Helmut Bölcskei
Professor Group: Communication Theory Group AddressETH Zürich Room: ETF E 122 Tel.:
+41 44 63 23433 Email: boelcskei (add ) 
Additional Information
Helmut Bölcskei was born in Mödling, Austria on May 29, 1970, and received the Dipl.Ing. and Dr. techn. degrees in electrical engineering from Vienna University of Technology, Vienna, Austria, in 1994 and 1997, respectively. In 1998 he was with Vienna University of Technology. From 1999 to 2001 he was a postdoctoral researcher in the Information Systems Laboratory, Department of Electrical Engineering, and in the Department of Statistics, Stanford University, Stanford, CA. He was in the founding team of Iospan Wireless Inc., a Silicon Valleybased startup company (acquired by Intel Corporation in 2002) specialized in multipleinput multipleoutput (MIMO) wireless systems for highspeed Internet access, and was a cofounder of Celestrius AG, Zurich, Switzerland. From 2001 to 2002 he was an Assistant Professor of Electrical Engineering at the University of Illinois at UrbanaChampaign. He has been with ETH Zurich since 2002, where he is a Professor of Electrical Engineering. He was a visiting researcher at Philips Research Laboratories Eindhoven, The Netherlands, ENST Paris, France, and the Heinrich Hertz Institute Berlin, Germany. His research interests are in information theory, mathematical signal processing, machine learning, and statistics.
He received the 2001 IEEE Signal Processing Society Young Author Best Paper Award, the 2006 IEEE Communications Society Leonard G. Abraham Best Paper Award, the 2010 Vodafone Innovations Award, the ETH "Golden Owl" Teaching Award, is a Fellow of the IEEE, a 2011 EURASIP Fellow, was a Distinguished Lecturer (20132014) of the IEEE Information Theory Society, an Erwin Schrödinger Fellow (19992001) of the Austrian National Science Foundation (FWF), was included in the 2014 Thomson Reuters List of Highly Cited Researchers in Computer Science, and is the 2016 Padovani Lecturer of the IEEE Information Theory Society. He served as an associate editor of the IEEE Transactions on Information Theory, the IEEE Transactions on Signal Processing, the IEEE Transactions on Wireless Communications, and the EURASIP Journal on Applied Signal Processing. He was editorinchief of the IEEE Transactions on Information Theory during the period 20102013. He served on the editorial board of the IEEE Signal Processing Magazine and is currently on the editorial boards of "Foundations and Trends in Networking” and "Foundations and Trends in Communications and Information Theory”. He was TPC cochair of the 2008 IEEE International Symposium on Information Theory and the 2016 IEEE Information Theory Workshop and serves on the Board of Governors of the IEEE Information Theory Society. He has been a delegate of the president of ETH Zurich for faculty appointments since 2008.
Current research topics
 Wireless communication networks
 Shannon theory
 Superresolution
 Clustering and classification
 Deep machine learning
 Highdimensional statistics
Curriculum Vitae
Publications
 Book Chapters

A short course on frame theory
V. I. Morgenshtern and H. Bölcskei, Chapter in Mathematical Foundations for Signal Processing, Communications, and Networking, E. Serpedin, T. Chen, and D. Rajan, Eds., CRC Press, pp. 737789, 2012. 
Information theory of underspread WSSUS channels
G. Durisi, V. I. Morgenshtern, H. Bölcskei, U. G. Schuster, and S. Shamai (Shitz), Chapter in Wireless Communications over Rapidly TimeVarying Channels, F. Hlawatsch and G. Matz, Eds., Academic Press, pp. 65116, 2011. 
Principles of MIMOOFDM wireless systems
H. Bölcskei, Chapter in CRC Handbook on Signal Processing for Mobile Communications, M. Ibnkahla, Ed., Ch. 12, 2004. 
Orthogonal frequency division multiplexing based on offset QAM
H. Bölcskei, Chapter in "Advances in Gabor Analysis", H. G. Feichtinger and T. Strohmer, eds., Birkhäuser, pp. 321352, 2003. 
Multipleinput multipleoutput (MIMO) wireless systems
H. Bölcskei and A. J. Paulraj, Chapter in "The Communications Handbook", 2nd edition, J. Gibson, ed., CRC Press, pp. 90.1  90.14, 2002. 
Oversampled modulated filter banks
H. Bölcskei and F. Hlawatsch, Chapter in "Gabor Analysis and Algorithms: Theory and Applications", H. G. Feichtinger and T. Strohmer, eds., Birkhäuser, pp. 295322, 1998.

A short course on frame theory
 Journal Papers and Manuscripts

Characterizing degrees of freedom through additive combinatorics
D. Stotz and H. Bölcskei, IEEE Transactions on Information Theory, 2016, to appear. 
Degrees of freedom in vector interference channels
D. Stotz and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 62, No. 7, pp. 41724197, 2016. 
Robust subspace clustering via thresholding
R. Heckel and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 61, No. 11, pp. 63206342, 2015. 
A mathematical theory of deep convolutional
neural networks for feature extraction
T. Wiatowski and H. Bölcskei, IEEE Transactions on Information Theory, Dec. 2015, submitted. 
Almost lossless analog signal separation and probabilistic uncertainty relations
D. Stotz, E. Riegler, E. Agustsson, and H. Bölcskei, IEEE Transactions on Information Theory, Dec. 2015, submitted. 
Dimensionalityreduced subspace clustering
R. Heckel, M. Tschannen, and H. Bölcskei, Information and Inference, Dec. 2015, submitted. 
A theory of superresolution from shorttime Fourier transform measurements
C. Aubel, D. Stotz, and H. Bölcskei, Journal of Fourier Analysis and Applications, (revised version Jan. 2016), Sept. 2015, submitted. 
Identification of sparse linear operators
R. Heckel and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 59, No. 12, pp. 79858000, Dec. 2013. 
Timefrequency foundations of communications
G. Matz, H. Bölcskei, and F. Hlawatsch, IEEE Signal Processing Magazine, Vol. 30, No. 6, pp. 8796, Nov. 2013. 
Capacity prelog of noncoherent SIMO channels via Hironaka's Theorem
V. I. Morgenshtern, E. Riegler, W. Yang, G. Durisi, S. Lin, B. Sturmfels, and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 59, No. 7, pp. 42134229, July 2013. 
On the sensitivity of continuoustime noncoherent fading channel capacity
G. Durisi, V. I. Morgenshtern, and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 58, No. 10, pp. 63726391, Oct. 2012. 
Diversitymultiplexing tradeoff in twouser fading interference channels
C. Akçaba and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 58, No. 7, pp. 44624480, July 2012. 
Recovery of sparsely corrupted signals
C. Studer, P. Kuppinger, G. Pope, and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 58, No. 5, pp. 31153130, May 2012. 
Uncertainty relations and sparse signal recovery for pairs of general signal sets
P. Kuppinger, G. Durisi, and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 58, No. 1, pp. 263277, Jan. 2012. 
Informationtheoretic analysis of MIMO channel sounding
D. S. Baum and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 57, No. 11, pp. 75557577, Nov. 2011. 
On the complexity distribution of sphere decoding
D. Seethaler, J. Jaldén, C. Studer, and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 57, No. 9, pp. 57545768, Sept. 2011. 
HighSNR capacity of wireless communication
channels in the noncoherent setting: A primer
G. Durisi and H. Bölcskei, International Journal of Electronics and Communications (AEÜ), Vol. 65, Issue 8, pp. 707712, Aug. 2011. 
Algorithms for interpolationbased QR decomposition in MIMOOFDM systems
D. Cescato and H. Bölcskei, IEEE Transactions on Signal Processing, Vol. 59, No. 4, pp. 17191733, Apr. 2011. 
Softinput softoutput single treesearch sphere decoding
C. Studer and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 56, No. 10, pp. 48274842, Oct. 2010. 
QR decomposition of Laurent polynomial matrices sampled on the unit circle
D. Cescato and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 56, No. 9, pp. 47544761, Sept. 2010. 
Blocksparse signals: Uncertainty relations and efficient recovery
Y. Eldar, P. Kuppinger, and H. Bölcskei, IEEE Transactions on Signal Processing, Vol. 58, No. 6, pp. 30423054, June 2010. 
Performance and complexity analysis of infinitynorm spheredecoding
D. Seethaler and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 56, No. 3, pp. 10851105, Mar. 2010. 
Noncoherent capacity of underspread fading channels
G. Durisi, U. G. Schuster, H. Bölcskei, and S. Shamai (Shitz), IEEE Transactions on Information Theory, Vol. 56, No. 1, pp. 367395, Jan. 2010. 
Capacity bounds for peakconstrained multiantenna wideband channels
U. G. Schuster, G. Durisi, H. Bölcskei, and H. V. Poor, IEEE Transactions on Communications, Vol. 57, No. 9, pp. 26862696, Sept. 2009. 
Quantization of filter bank frame expansions through moving horizon optimization
D. E. Quevedo, H. Bölcskei, and G. C. Goodwin, IEEE Transactions on Signal Processing, Vol. 57, No. 2, pp. 503515, Feb. 2009. 
Softoutput sphere decoding: Algorithms and VLSI implementation
C. Studer, A. Burg, and H. Bölcskei, IEEE Journal on Selected Areas in Communications, Vol. 26, No. 2, pp. 290300, Feb. 2008. 
Crystallization in large wireless networks
V. I. Morgenshtern and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 53, No. 10, pp. 33193349, Oct. 2007. 
Ultrawideband channel modeling on the basis of informationtheoretic criteria
U. G. Schuster and H. Bölcskei, IEEE Transactions on Wireless Communications, Vol. 6, No. 7, pp. 24642475, July 2007. 
Multipleaccess strategies for frequencyselective MIMO channels
S. Visuri and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 52, No. 9, pp. 39803993, Sept. 2006. 
MIMOOFDM wireless systems: Basics, perspectives, and challenges
H. Bölcskei, IEEE Wireless Communications, Vol. 13, Issue 4, pp. 3137, Aug. 2006, (invited paper). 
Capacity scaling laws in MIMO relay networks
H. Bölcskei, R. U. Nabar, Ö. Oyman, and A. J. Paulraj, IEEE Transactions on Wireless Communications, Vol. 5, No. 6, pp. 14331444, June 2006. 
ASIC implementation of a MIMOOFDM transceiver for 192 Mbps WLANs
D. Perels, S. Haene, P. Luethi, A. Burg, N. Felber, W. Fichtner, and H. Bölcskei, European SolidState Circuits Conference (ESSCIRC), pp. 215218, Sept. 2005. 
Diversity and outage performance in spacetime block coded Ricean MIMO channels
R. U. Nabar, H. Bölcskei, and A. J. Paulraj, IEEE Transactions on Wireless Communications, Vol. 4, No. 5, pp. 25192532, Sept. 2005. 
Noncoherent spacefrequency coded MIMOOFDM
M. Borgmann and H. Bölcskei, IEEE Journal on Selected Areas in Communications, Vol. 23, No. 9, pp. 17991810, Sept. 2005. 
VLSI implementation of MIMO detection using the sphere decoding algorithm
A. Burg, M. Borgmann, M. Wenk, M. Zellweger, W. Fichtner, and H. Bölcskei, IEEE Journal of SolidState Circuits, Vol 40, No. 7, pp. 15661577, July 2005, (invited paper). 
Fading relay channels: Performance limits and spacetime signal design
R. U. Nabar, H. Bölcskei, and F. W. Kneubühler, IEEE Journal on Selected Areas in Communications, Vol. 22, No. 6, pp. 10991109, Aug. 2004. 
An overview of MIMO communications  A key to Gigabit wireless
A. J. Paulraj, D. A. Gore, R. U. Nabar, and H. Bölcskei, Proceedings of the IEEE, Vol. 92, No. 2, pp. 198218, Feb. 2004, (invited paper). 
Characterizing the statistical properties of mutual information in MIMO channels
Ö. Oyman, R. U. Nabar, H. Bölcskei, and A. J. Paulraj, IEEE Transactions on Signal Processing, Vol. 51, No. 11, pp. 27842795, Nov. 2003. 
Orthogonalization of OFDM/OQAM pulse shaping filters using the discrete Zak transform
H. Bölcskei, P. Duhamel, and R. Hleiss, Signal Processing, Vol. 83, No.7, pp. 13791391, July 2003. 
Geometrically uniform frames
Y. Eldar and H. Bölcskei, IEEE Transactions on Information Theory, Vol. 49, No. 4, pp. 9931006, Apr. 2003. 
Impact of the propagation environment on the performance of spacefrequency coded MIMOOFDM
H. Bölcskei, M. Borgmann, and A. J. Paulraj, IEEE Journal on Selected Areas in Communications, Vol. 21, No. 3, pp. 427439, Apr. 2003. 
Outdoor MIMO wireless channels: Models and performance prediction
D. Gesbert, H. Bölcskei, D. A. Gore, and A. J. Paulraj, IEEE Transactions on Communications, Vol. 50, No. 12, pp. 19261934, Dec. 2002. 
Performance of multiantenna signaling strategies using dualpolarized antennas:
Measurement results and analysis
R. U. Nabar, V. Erceg, H. Bölcskei, and A. J. Paulraj, Wireless Personal Communications, Vol. 23, Issue 1, pp. 3144, Oct. 2002, (invited paper). 
Performance of multiantenna signaling techniques in the presence of polarization diversity
R. U. Nabar, H. Bölcskei, V. Erceg, D. Gesbert, and A. J. Paulraj, IEEE Transactions on Signal Processing, Vol. 50, No. 10, pp. 25532562, Oct. 2002. 
Technologies and performance for nonlineofsight broadband wireless access networks
D. Gesbert, L. Haumonte, H. Bölcskei, R. Krishnamoorthy, and A. J. Paulraj, IEEE Communications Magazine, Vol. 40, No. 4, pp. 8695, Apr. 2002. 
On the capacity of OFDMbased spatial multiplexing systems
H. Bölcskei, D. Gesbert, and A. J. Paulraj, IEEE Transactions on Communications, Vol. 50, No. 2, pp. 225234, Feb. 2002. 
Blind channel identification and equalization in OFDMbased multiantenna systems
H. Bölcskei, R. W. Heath Jr., and A. J. Paulraj, IEEE Transactions on Signal Processing, Vol. 50, No. 1, pp. 96109, Jan. 2002. 
A subspacebased approach to blind channel identification in pulse shaping OFDM/OQAM systems
H. Bölcskei, P. Duhamel, and R. Hleiss, IEEE Transactions on Signal Processing, Vol. 49, No. 7, pp. 15941598, July 2001. 
Blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems
H. Bölcskei, IEEE Transactions on Communications, Vol. 49, No. 6, pp. 988999, June 2001. 
Fixed broadband wireless access: State of the art, challenges, and future directions
H. Bölcskei, A. J. Paulraj, K. V. S. Hari, R. U. Nabar, and W. W. Lu, IEEE Communications Magazine, Vol. 39, No. 1, pp. 100108, Jan. 2001, (invited paper). 
Noise reduction in oversampled filter banks using predictive quantization
H. Bölcskei and F. Hlawatsch, IEEE Transactions on Information Theory, Vol. 47, No. 1, pp. 155172, Jan. 2001. 
Design of orthogonal and biorthogonal lapped transforms satisfying perception related constraints
H. Bölcskei, R. Heusdens, R. Theunis, and A. J. E. M. Janssen, IEEE Trans. Image Processing, Vol. 9, No. 5, pp. 760772, May 2000. 
Gabor frames, unimodularity, and window decay
H. Bölcskei and A. J. E. M. Janssen, The Journal of Fourier Analysis and Applications, Vol. 6, No. 3, pp. 255276, May 2000. 
Equivalence of two methods for constructing tight Gabor frames
A. J. E. M. Janssen and H. Bölcskei, IEEE Signal Processing Letters, Vol. 7, No. 4, pp. 7982, Apr. 2000. 
A necessary and sufficient condition for dual WeylHeisenberg frames to be compactly supported
H. Bölcskei, The Journal of Fourier Analysis and Applications, Vol. 5, No. 5, pp. 409419, 1999. 
Frametheoretic analysis of oversampled filter banks
H. Bölcskei, F. Hlawatsch, and H. G. Feichtinger, IEEE Trans. Signal Processing, Vol. 46, No. 12, pp. 32563268, Dec. 1998. 
Oversampled cosine modulated filter banks with perfect reconstruction
H. Bölcskei and F. Hlawatsch, IEEE Trans. Circuits and Systems II, Vol. 45, No. 8, pp. 10571071, Aug. 1998. 
Discrete Zak transforms, polyphase transforms, and applications
H. Bölcskei and F. Hlawatsch, IEEE Trans. Signal Processing, Vol. 45, No. 4, pp. 851866, Apr. 1997. 
Oversampled Wilson expansions
H. Bölcskei, K. Gröchenig, F. Hlawatsch, and H. G. Feichtinger, IEEE Signal Processing Letters, Vol. 4, No. 4, pp. 106108, Apr. 1997. 
Covariant timefrequency distributions based on conjugate operators
F. Hlawatsch and H. Bölcskei, IEEE Signal Processing Letters, Vol. 3, No. 2, pp. 4446, Feb. 1996.

Characterizing degrees of freedom through additive combinatorics
 Conference, Symposium, and Workshop Papers

Canonical conditions for K/2 degrees of freedom
D. Stotz, S. A. Jafar, H. Bölcskei, and S. Shamai (Shitz), Proc. of IEEE International Symposium on Information Theory (ISIT), Barcelona, Spain, July 2016, to appear. 
Deep convolutional neural networks on cartoon functions
P. Grohs, T. Wiatowski, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Barcelona, Spain, pp. 11631167, July 2016. 
Deterministic performance analysis of subspace methods for cisoid parameter estimation
C. Aubel and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Barcelona, Spain, July 2016, to appear. 
Lossless linear analog compression
G. Alberti, H. Bölcskei, C. De Lellis, G. Koliander, and E. Riegler, Proc. of IEEE International Symposium on Information Theory (ISIT), Barcelona, Spain, July 2016, to appear. 
Discrete deep feature extraction: A theory and new architectures
T. Wiatowski, M. Tschannen, A. Stanić, P. Grohs, and H. Bölcskei, Proc. of International Conference on Machine Learning (ICML), New York, USA, pp. 21492158, June 2016. 
Deep convolutional neural networks based on semidiscrete frames
T. Wiatowski and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Hong Kong, China, pp. 12121216, June 2015. 
Density criteria for the identification of linear timevarying systems
C. Aubel and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Hong Kong, China, pp. 25682572, June 2015. 
Informationtheoretic limits of matrix completion
E. Riegler, D. Stotz, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Hong Kong, China, pp. 18361840, June 2015. 
Nonparametric nearest neighbor random process clustering
M. Tschannen and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Hong Kong, China, pp. 12071211, June 2015. 
Explicit and almost sure conditions for K/2 degrees of freedom
D. Stotz and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Honolulu, HI, pp. 471475, July 2014. 
Subspace clustering of dimensionalityreduced data
R. Heckel, M. Tschannen, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Honolulu, HI, pp. 29973001, July 2014. 
Compressive nonparametric graphical model selection for time series
A. Jung, R. Heckel, H. Bölcskei, and F. Hlawatsch, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), pp. 769773, May 2014. 
Neighborhood selection for thresholdingbased subspace clustering
R. Heckel, E. Agustsson, and H. Bölcskei, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), pp. 67616765, May 2014. 
Superresolution from shorttime Fourier transform measurements
C. Aubel, D. Stotz, and H. Bölcskei, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Florence, Italy, pp. 3640, May 2014. 
Almost lossless analog signal separation
D. Stotz, E. Riegler, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Istanbul, Turkey, pp. 106  110, July 2013. 
Noisy subspace clustering via thresholding
R. Heckel and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Istanbul, Turkey, pp. 13821386, July 2013. 
Subspace clustering via thresholding and spectral clustering
R. Heckel and H. Bölcskei, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vancouver, Canada, pp. 32633267, May 2013. 
Degrees of freedom in vector interference channels
D. Stotz and H. Bölcskei, Allerton Conference on Communication, Control, and Computing, Monticello, IL, pp. 1755  1760, Oct. 2012. 
Joint sparsity with different measurement matrices
R. Heckel and H. Bölcskei, Allerton Conference on Communication, Control, and Computing, Monticello, IL, pp. 698702, Oct. 2012, (invited paper). 
Sparse signal recovery in Hilbert spaces
G. Pope and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Boston, MA, pp. 14631467, July 2012. 
Sparse signal separation in redundant dictionaries
C. Aubel, C. Studer, G. Pope, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Boston, MA, USA, pp. 2047  2051, July 2012. 
Compressive identification of linear operators
R. Heckel and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), St. Petersburg, Russia, pp. 14121416, Aug. 2011. 
Noncoherent SIMO prelog via resolution of singularities
E. Riegler, V. I. Morgenshtern, G. Durisi, S. Lin, B. Sturmfels, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), St. Petersburg, Russia, pp. 20202024, Aug. 2011. 
Sparse signal recovery from sparsely corrupted measurements
C. Studer, P. Kuppinger, G. Pope, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), St. Petersburg, Russia, pp. 14221426, Aug. 2011. 
The SIMO prelog can be larger than the SISO prelog
V. I. Morgenshtern, G. Durisi, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Austin, TX, pp. 320324, June 2010. 
Where is randomness needed to break the squareroot bottleneck?
P. Kuppinger, G. Durisi, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Austin, TX, pp. 15781582, June 2010. 
Improved sparsity thresholds through dictionary splitting
P. Kuppinger, G. Durisi, and H. Bölcskei, Proc. of IEEE Information Theory Workshop, Taormina, Italy, pp. 338342, Oct. 2009, (invited paper). 
Interference alignment with limited feedback
J. Thukral and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Seoul, South Korea, pp. 17591763, June 2009. 
On the achievable diversitymultiplexing tradeoff in interference channels
C. Akçaba and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Seoul, South Korea, pp. 16041608, June 2009. 
On the sensitivity of noncoherent capacity to the channel model
G. Durisi, V. I. Morgenshtern, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Seoul, South Korea, pp. 21742178, June 2009. 
Tail behavior of spheredecoding complexity in random lattices
D. Seethaler, J. Jaldén, C. Studer, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Seoul, South Korea, pp. 729733, June 2009. 
Finite latticesize effects in MIMO detection
C. Studer, D. Seethaler, and H. Bölcskei, Proc. of Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, pp. 20322037, Oct. 2008, (invited paper). 
Capacity bounds for peakconstrained multiantenna wideband channels
U. G. Schuster, G. Durisi, H. Bölcskei, and H. V. Poor, Proc. of IEEE International Symposium on Information Theory (ISIT), Toronto, ON, Canada, pp. 15821586, July 2008. 
Diversitymultiplexing tradeoff in selectivefading multipleaccess MIMO channels
P. Coronel, M. Gärtner, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Toronto, ON, Canada, pp. 915919, July 2008. 
Infinitynorm spheredecoding
D. Seethaler and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Toronto, ON, Canada, pp. 20022006, July 2008. 
Softinput softoutput sphere decoding
C. Studer and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Toronto, ON, Canada, pp. 20072011, July 2008. 
Distributed spatial multiplexing with 1bit feedback
J. Thukral and H. Bölcskei, Allerton Conference on Communication, Control, and Computing, Monticello, IL, pp. 502509, Sept. 2007, (invited paper). 
Distributed transmit diversity in relay networks
C. Akçaba, P. Kuppinger, and H. Bölcskei, IEEE Information Theory Workshop (ITW), Bergen, Norway, pp. 233237, July 2007. 
Capacity of underspread noncoherent WSSUS fading channels under peak signal constraints
G. Durisi, H. Bölcskei, and S. Shamai (Shitz), Proc. of IEEE International Symposium on Information Theory (ISIT), Nice, France, pp. 156160, June 2007. 
Diversitymultiplexing tradeoff in selectivefading MIMO channels
P. Coronel and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Nice, France, pp. 28412845, June 2007. 
On the "critical rate" in Ricean MIMO channels
M. Gärtner and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Nice, France, pp. 526530, June 2007. 
Softoutput sphere decoding: Performance and implementation aspects
C. Studer, M. Wenk, A. Burg, and H. Bölcskei, Proc. of Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, pp. 20712076, Nov. 2006, (invited paper). 
Random matrix analysis of large relay networks
V. I. Morgenshtern and H. Bölcskei, Allerton Conference on Communication, Control, and Computing, Monticello, IL, pp. 106112, Sept. 2006, (invited paper). 
Capacity of underspread WSSUS fading channels in the wideband regime
G. Durisi, H. Bölcskei, and S. Shamai (Shitz), Proc. of IEEE International Symposium on Information Theory (ISIT), Seattle, WA, pp. 15001504, July 2006. 
Multiuser spacetime/frequency code design
M. Gärtner and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Seattle, WA, pp. 28192823, July 2006. 
Capacity of large amplify and forward relay networks
V. I. Morgenshtern and H. Bölcskei, IEEE Communication Theory Workshop, May 2006, (invited paper). 
Advanced receiver algorithms for MIMO wireless communications
A. Burg, M. Borgmann, M. Wenk, C. Studer, and H. Bölcskei, Proc. Design, Automation, and Test in Europe Conf. (DATE), Vol. 1, pp. 593598, Mar. 2006, (invited paper). 
Distributed orthogonalization in large interference relay networks
V. I. Morgenshtern, H. Bölcskei, and R. U. Nabar, Proc. IEEE Int. Symposium on Information Theory (ISIT), Adelaide, Australia, pp. 12111215, Sept. 2005. 
On the capacity of noncoherent wideband MIMOOFDM systems
M. Borgmann and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Adelaide, Australia, pp. 651655, Sept. 2005. 
On the value of cooperation in interference relay networks
V. I. Morgenshtern and H. Bölcskei, Allerton Conference on Communication, Control, and Computing, Monticello, IL, pp. 19391949, Sept. 2005, (invited paper). 
Ultrawideband channel modeling on the basis of informationtheoretic criteria
U. G. Schuster, H. Bölcskei, and G. Durisi, Proc. of IEEE International Symposium on Information Theory (ISIT), Adelaide, Australia, pp. 97101, Sept. 2005. 
How different are UWB channels from conventional wideband channels?
U. G. Schuster and H. Bölcskei, International Workshop on Convergent Technologies (IWCT), Oulu, Finland, June 2005, (invited paper). 
Interpolationbased QR decomposition in MIMOOFDM systems
D. Cescato, M. Borgmann, H. Bölcskei, J. Hansen, and A. Burg, Proc. of IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications (SPAWC), New York, NY, USA, pp. 945949, June 2005, (invited paper). 
Multistep optimal quantization in oversampled filter banks
D. E. Quevedo, G. C. Goodwin, and H. Bölcskei, Proc. of IEEE Conference on Decision and Control (CDC), Atlantis, Paradise Island, Bahamas, pp. 14421447, Dec. 2004. 
Interpolationbased efficient matrix inversion for MIMOOFDM receivers
M. Borgmann and H. Bölcskei, Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, pp. 1941  1947, Vol. 2, Nov. 2004, (invited paper). 
Capacity scaling laws in asynchronous relay networks
R. U. Nabar and H. Bölcskei, Allerton Conference on Communication, Control, and Computing, Monticello, IL, pp. 502511, Oct. 2004, (invited paper). 
Ergodic capacity and outage properties of CDMA in multipleaccess fading channels
M. Gärtner and H. Bölcskei, Proc. of International Symposium on Information Theory and its Applications (ISITA), Parma, Italy, pp. 722727, Oct. 2004. 
Impact of phase noise on MIMO channel measurement accuracy
D. S. Baum and H. Bölcskei, Proc. of IEEE Vehicular Technology Conference (VTC) Fall, Los Angeles, CA, USA, Vol. 3, pp. 16141618, Sept. 2004, (invited paper). 
On multiple accessing for frequencyselective MIMO channels
S. Visuri and H. Bölcskei, European Signal Processing Conference (EUSIPCO), Vienna, Austria, pp. 523527, Sept. 2004, (invited paper). 
A geometrical investigation of the rank1 Ricean MIMO channel at high SNR
J. Hansen and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Chicago, IL, USA, pp. 64, June 2004. 
MIMOOFDM multiple access with variable amount of collision
S. Visuri and H. Bölcskei, Proc. of IEEE International Conference on Communications (ICC), Paris, France, pp. 286291, June 2004. 
Realizing MIMO gains without user cooperation in large singleantenna wireless networks
H. Bölcskei and R. U. Nabar, Proc. of IEEE International Symposium on Information Theory (ISIT), Chicago, IL, USA, pp. 20, June 2004. 
Semicoherent PPM for wideband communications
U. G. Schuster, M. Borgmann, and H. Bölcskei, Proc. of IEEE International Symposium on Information Theory (ISIT), Chicago, IL, USA, pp. 383, June 2004. 
System capacity of wideband OFDM communications over fading channels without channel knowledge
D. Schafhuber, H. Bölcskei, and G. Matz, Proc. of IEEE International Symposium on Information Theory (ISIT), Chicago, IL, USA, pp. 389, June 2004. 
Performance limits of amplifyandforward based fading relay channels
R. U. Nabar, F. W. Kneubühler, and H. Bölcskei, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Montreal, Quebec, Canada, Vol. 4, pp. 565568, May 2004. 
Diversity performance of Ricean MIMO channels
R. U. Nabar, H. Bölcskei, and A. J. Paulraj, ITG Workshop on Smart Antennas, Munich, Germany, pp. 253256, Mar. 2004. 
Spacetime signal design for fading relay channels
R. U. Nabar and H. Bölcskei, Proc. of IEEE Global Telecommunications Conference (GLOBECOM), San Francisco, CA, Vol. 4, pp. 19521956, Dec. 2003. 
Capacity scaling laws in MIMO wireless networks
R. U. Nabar, Ö. Oyman, H. Bölcskei, and A. J. Paulraj, Allerton Conference on Communication, Control, and Computing, Monticello, IL, pp. 378389, Oct. 2003, (invited paper). 
Spacefrequency coded MIMOOFDM with variable multiplexingdiversity tradeoff
H. Bölcskei, M. Borgmann, and A. J. Paulraj, Proc. of IEEE International Conference on Communications (ICC), Anchorage, AK, Vol. 4, pp. 28372841, May 2003. 
Structured group frames
Y. Eldar and H. Bölcskei, Proc. of 2003 Workshop on Sampling Theory and Applications (SampTA'03), May 2003. 
Cutoff rate based transmit optimization for spatial multiplexing on general MIMO channels
R. U. Nabar, H. Bölcskei, and A. J. Paulraj, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vol. 5, pp. V61V64, Apr. 2003. 
Characterizing the statistical properties of mutual information in MIMO channels: Insights into diversitymultiplexing tradeoff
Ö. Oyman, R. U. Nabar, H. Bölcskei, and A. J. Paulraj, Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Vol. 1, pp. 521525, Nov. 2002. 
Tight lower bounds on the ergodic capacity of Rayleigh fading MIMO channels
Ö. Oyman, R. U. Nabar, H. Bölcskei, and A. J. Paulraj, Proc. of IEEE Global Telecommunications Conference (GLOBECOM), Taipei, Taiwan, R.O.C., Vol. 2, pp. 11721176, Nov. 2002. 
Code design for noncoherent MIMOOFDM systems
H. Bölcskei and M. Borgmann, Allerton Conf. on Communication, Control, and Computing, Monticello, IL, pp. 237246, Oct. 2002, (invited paper). 
Performance of spacefrequency coded broadband OFDM under realworld propagation conditions
H. Bölcskei, M. Borgmann, and A. J. Paulraj, European Signal Processing Conference (EUSIPCO), Sept. 2002, Toulouse, France, Vol. 2, pp. 413416, Sept. 2002, (invited paper). 
Coding and modulation for underspread fading channels
H. Bölcskei, R. Koetter, and S. Mallik, Proc. of IEEE International Symposium on Information Theory (ISIT), Lausanne, Switzerland, pp. 358, June 2002. 
Outage properties of spacetime block codes in correlated Rayleigh or Ricean fading environments
R. U. Nabar, H. Bölcskei, and A. J. Paulraj, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Orlando, FL, Vol. 3, pp. 23812384, May 2002. 
Influence of propagation conditions on the outage capacity of spacetime block codes
R. U. Nabar, H. Bölcskei, and A. J. Paulraj, European Wireless 2002, Florence, Italy, Vol. 1, pp. 629634, Feb. 2002. 
Transmit optimization for spatial multiplexing in the presence of spatial fading correlation
R. U. Nabar, H. Bölcskei, and A. J. Paulraj, IEEE Global Telecommunications Conference (GLOBECOM), San Antonio, TX, Vol. 1, pp. 131135, Nov. 2001. 
Performance of multiantenna signaling strategies using dualpolarized antennas: Measurement results and analysis
R. U. Nabar, V. Erceg, H. Bölcskei, and A. J. Paulraj, International Symposium on Wireless Personal Multimedia Communications (WPMC), Aalborg, Denmark, pp. 175180, Sept. 2001, (invited paper). 
Spacefrequency codes for broadband fading channels
H. Bölcskei and A. J. Paulraj, Proc. of IEEE International Symposium on Information Theory (ISIT), Washington, D.C., pp. 219, June 2001. 
Performance of spatial multiplexing in the presence of polarization diversity
H. Bölcskei, R. U. Nabar, V. Erceg, D. Gesbert, and A. J. Paulraj, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Salt Lake City, UT, Vol. 4, pp. 24372440, May 2001. 
Spacetime signaling and frame theory
R. W. Heath Jr., H. Bölcskei, and A. J. Paulraj, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Salt Lake City, UT, Vol. 4, pp. 24452448, May 2001. 
MIMO wireless channels: Capacity and performance prediction
D. Gesbert, H. Bölcskei, D. A. Gore, and A. J. Paulraj, IEEE Global Telecommunications Conference (GLOBECOM), San Francisco, CA, Vol. 2, pp. 10831088, Nov. 2000. 
Blind equalization in OFDMbased multiantenna systems
H. Bölcskei, R. W. Heath Jr., and A. J. Paulraj, Adaptive Systems for Signal Processing, Communications, and Control Symposium 2000 (ASSPCC), Lake Louise, Alberta, CA, pp. 5863, Oct. 2000, (invited paper). 
Performance evaluation for scattering MIMO channel models
D. Gesbert, H. Bölcskei, D. A. Gore, and A. J. Paulraj, Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove (CA), Vol. 1, pp. 748752, Oct. 2000, (invited paper). 
Performance of spacetime codes in the presence of spatial fading correlation
H. Bölcskei and A. J. Paulraj, Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove (CA), Vol. 1, pp. 687693, Oct. 2000, (invited paper). 
Preequalization for MIMO wireless channels with delay spread
H. Sampath, H. Bölcskei, and A. J. Paulraj, IEEE Vehicular Technology Conference (VTC) Fall, Boston (MA), Vol. 3, pp. 11751178, Sept. 2000. 
Spacefrequency coded broadband OFDM systems
H. Bölcskei and A. J. Paulraj, IEEE Wireless Communications and Networking Conference (WCNC) 2000, Vol. 1, pp. 16, Sept. 2000, (invited paper). 
On the capacity of OFDMbased multiantenna systems
H. Bölcskei, D. Gesbert, and A. J. Paulraj, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Istanbul, Turkey, Vol. 5, pp. 25692572, June 2000. 
Blind channel estimation in spatial multiplexing systems using nonredundant antenna precoding
H. Bölcskei, R. W. Heath Jr., and A. J. Paulraj, Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove (CA), Vol. 2, pp. 11271132, Oct. 1999. 
Efficient design of pulse shaping filters for OFDM systems
H. Bölcskei, SPIE Proc., "Wavelet Applications in Signal and Image Processing VII", Denver (CO), July 1999, Vol. 3813, pp. 625636, July 1999, (invited paper). 
Design of pulse shaping OFDM/OQAM systems for high datarate transmission over wireless channels
H. Bölcskei, P. Duhamel, and R. Hleiss, Proc. of IEEE International Conference on Communications (ICC), Vancouver B.C., Canada, Vol. 1, pp. 559564, June 1999. 
Blind channel identification in highdatarate pulse shaping OFDM/OQAM systems
H. Bölcskei, P. Duhamel, and R. Hleiss, Proc. of IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Annapolis, MD, pp. 154157, May 1999. 
Blind highresolution uplink synchronization of OFDMbased multiple access schemes
H. Bölcskei, Proc. of IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Annapolis, MD, pp. 166169, May 1999. 
Blind estimation of symbol timing and carrier frequency offset in pulse shaping OFDM systems
H. Bölcskei, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Phoenix, Arizona, Vol. 5, pp. 27492752, Mar. 1999. 
Oversampling in wavelet subspaces
H. Bölcskei, Proc. of IEEE International Symposium on TimeFrequency and TimeScale Analysis (TFTS), Pittsburgh (PA), pp. 489492, Oct. 1998. 
Quantization noise reduction in oversampled filter banks
H. Bölcskei and F. Hlawatsch, Proc. of IEEE International Symposium on TimeFrequency and TimeScale Analysis (TFTS), Pittsburgh (PA), pp. 509512, Oct. 1998. 
Error floor of pulse amplitude modulation with adaptive sampling phase in timedispersive fading channels
A. F. Molisch and H. Bölcskei, Proc. of IEEE Personal, Indoor and Mobile Radio Communications Conference (PIMRC), Boston (MA), Vol. 2, pp. 884890, Sept. 1998. 
Subband image coding using cosine modulated filter banks with perfect reconstruction and linear phase
H. Bölcskei, T. Stranz, F. Hlawatsch, and R. Sucher, Proc. of IEEE International Conference on Image Processing (ICIP), Santa Barbara (CA), Vol. 2, pp. 594597, Oct. 1997. 
Oversampled cosine modulated filter banks with linear phase
H. Bölcskei and F. Hlawatsch, Proc. of IEEE International Symposium on Circuits and Systems (ISCAS), Hong Kong, Vol. 1, pp. 357360, June 1997. 
Oversampled filter banks: Optimal noise shaping, design freedom, and noise analysis
H. Bölcskei and F. Hlawatsch, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Munich, Germany, Vol. 3, pp. 24532456, Apr. 1997. 
Oversampled Wilsontype cosine modulated filter banks with linear phase
H. Bölcskei and F. Hlawatsch, Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove (CA), pp. 9981002, Nov. 1996. 
Discretetime Wilson expansions
H. Bölcskei, H. G. Feichtinger, K. Gröchenig, and F. Hlawatsch, Proc. of IEEE International Symposium on TimeFrequency and TimeScale Analysis, Paris (France), pp. 525528, June 1996. 
Frametheoretic analysis and design of oversampled filter banks
H. Bölcskei, F. Hlawatsch, and H. G. Feichtinger, Proc. of IEEE International Symposium on Circuits and Systems (ISCAS), Atlanta (GA), Vol. 2, pp. 409412, May 1996. 
Oversampled FIR and IIR DFT filter banks and WeylHeisenberg frames
H. Bölcskei, F. Hlawatsch, and H. G. Feichtinger, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Atlanta (GA), Vol. 3, pp. 13911394, May 1996. 
Wignertype ab and timefrequency analysis based on conjugate operators
F. Hlawatsch, T. Twaroch, and H. Bölcskei, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Atlanta (GA), Vol. 3, pp. 13951398, May 1996. 
Diagonalizing the Gabor frame operator
H. Bölcskei, H. G. Feichtinger, and F. Hlawatsch, Proc. IEEE UK Sympos. Applications of TimeFrequency and TimeScale Methods, Univ. of Warwick, Coventry, UK, pp. 249255a, Aug. 1995. 
Timefrequency distributions based on conjugate operators
F. Hlawatsch and H. Bölcskei, Proc. IEEE UK Sympos. Applications of TimeFrequency and TimeScale Methods, Univ. of Warwick, Coventry (UK), pp. 187193a, Aug. 1995. 
Equivalence of DFT filter banks and Gabor expansions
H. Bölcskei, F. Hlawatsch, and H. G. Feichtinger, SPIE Proc. Vol. 2569, "Wavelet Applications in Signal and Image Processing III", San Diego (CA), pp. 128139, July 1995. 
Displacementcovariant timefrequency energy distributions
F. Hlawatsch and H. Bölcskei, Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Detroit (MI), Vol. 2, pp. 10251028, May 1995. 
Timefrequency analysis of frames
F. Hlawatsch and H. Bölcskei, Proc. of IEEE International Symposium on TimeFrequency and TimeScale Analysis (TFTS), Philadelphia (PA), pp. 5255, Oct. 1994. 
Unified theory of displacementcovariant timefrequency analysis
F. Hlawatsch and H. Bölcskei, Proc. of IEEE International Symposium on TimeFrequency and TimeScale Analysis (TFTS), Philadelphia (PA), pp. 524527, Oct. 1994.

Canonical conditions for K/2 degrees of freedom
 Theses

Oversampled filter banks and predictive subband coders
H. Bölcskei, PhD thesis, Vienna University of Technology, Nov. 1997. 
Gabor expansion and frame theory
H. Bölcskei, Diploma thesis, Vienna University of Technology, Sept. 1994.

Oversampled filter banks and predictive subband coders