MLSE Post-Detection for ISI Mitigation and Synchronization in UWB Low Complexity Receivers
AuthorsFlorian Trösch and Armin Wittneben
ReferenceIEEE Vehicular Technology Conference, VTC Spring 2007, Dublin, Ireland, Apr. 2007
AbstractA wireless body area network with an average throughput of 1 Mbps is considered based on ultra-wideband pulse position modulation. For a long battery autonomy, a low duty cycle operation of the nodes and thus, a high peak data rate is essential. Due to the moderate path loss, a peak data rate in excess of 50 Mbps is feasible within the Federal Communications Commission's transmit power constraints. However, with current low complexity pulse position detectors, such as the energy detector, the peak data rate is constrained to much lower values, because they are very sensitive to intersymbol interference. To overcome this constraint a simple post-detection maximum-likelihood sequence estimator is introduced which significantly reduces the impact of intersymbol interference. The same maximum likelihood sequence estimator is then used to replace cumbersome synchronization algorithms at the expense of slight performance losses.
KeywordsMLSE, UWB, Impulse Radio, Energy Detector, Low Complexity
Download this document:
Copyright Notice: © 2007 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.