Blind channel identification in high-data-rate pulse shaping OFDM/OQAM systems


Helmut Bölcskei, Pierre Duhamel, and Rima Hleiss


Proc. of IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Annapolis, MD, pp. 154-157, May 1999

DOI: 10.1109/SPAWC.1999.783042

[BibTeX, LaTeX, and HTML Reference]


Pulse shaping OFDM systems based on offset QAM (OFDM/OQAM) are particularly attractive for wireless high-data-rate applications. Since OFDM/OQAM schemes do not employ a cyclic prefix, equalization has to be performed. In this paper, we introduce an algorithm for blind channel identification in pulse shaping OFDM/OQAM systems. Our approach assumes that the receiver knows the transmitter pulse shaping filter. Exploiting cyclostationarity of the received OFDM signal blind channel identification is accomplished using second-order statistics only. The proposed method exhibits low noise sensitivity, is computationally efficient, and does not require knowledge of the channel order. Finally, we provide simulation results demonstrating the performance of the new algorithm.


OFDM, offset QAM, pulse shaping, cyclostationarity, blind channel estimation, subspace methods

Download this document:


Copyright Notice: © 1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.