Pulse Position Pre-Coding Exploiting UWB Power Constraints
AuthorsFlorian Trösch, Frank Althaus, and Armin Wittneben
Reference6th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2005, New York, June 2005
AbstractDue to dense multipath channels, coherent receivers in Ultra-Wideband Impulse Radio (UWB-IR) technology are high in hardware complexity and power consumption. This makes coherent receivers in downlink transmission of Low Data Rate (LDR) applications, where a more complex node communicates with many basic sensors, unreasonable. Pre-coding schemes are known solutions to transfer receiver complexity to transmitter side, while maintaining receiver performance. We sketch performance and scalability potential of pre-coding schemes in LDR systems in presence of drastic Federal Communications Commission's (FCC) power constraints. This is done by Symbol Error Rate (SER) analysis of an easily realizable Pulse Position Pre-coding (PPP) scheme, supported by simulation results over measured UWB channels. Under realistic conditions, PPP gains up to 9dB are demonstrated, and it is shown that already a few PPP pulses are sufficient to significantly reduce receiver complexity, at the expense of more transmit power.
KeywordsUWB, Impulse Radio, Pulse Position Precoding, Pulse Position Modulation, Low Data Rate, Senor Networks, Scalability
Download this document:
Copyright Notice: © 2005 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.