Non-Linear UWB Receivers With MLSE Post-Detection

Authors

Florian Trösch, Thomas Zasowski, and Armin Wittneben

Reference

IEEE Vehicular Technology Conference, VTC Spring 2008, Singapore, Singapore, May 2008.

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Abstract

A wireless body area network with an average throughput of 500 kbps is considered based on ultra-wideband (UWB) pulse position modulation. For a long battery autonomy ultra low power consumption is essential. In [1] a FCC compliant ultra low power UWB communication system was presented. By means of a 1% duty cycle at 50 Mbps peak data rate, the power consumption of the system is estimated below 1 mW. To increase inter-symbol interference (ISI) robustness as well as for synchronization a simple post-detection maximum-likelihood sequence estimator (MLSE) has been presented [2], [3]. In this work, we extend this MLSE approach to over-sampled energy detectors and non-ideal integration windows. Furthermore, we present optimal MLSE metrics based on partial channel state information as a performance benchmark.

Keywords

ultra-wideband, impulse radio, inter-symbol interference,non-linear receiver, viterbi decoder, MLSE post-detection

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