Document Type

Article

Publication Date

Fall 11-2010

Publication Source

IEEE Transactions on Consumer Electronics

Volume

56

Issue

4

Inclusive pages

2123-2131

DOI

10.1109/TCE.2010.5681081

Publisher

Institute of Electrical and Electronics Engineers

Place of Publication

United States

ISBN/ISSN

0098-3063

Peer Reviewed

yes

Abstract

In this work we explore flexible modulations toallow demodulation using receivers with different complexityand cost. More specifically, we study pulse-based ultrawideband (UWB) communications over channels with densemultipath effects using frequency shift keying (FSK) datamodulation. Our aim is to explore the performance tradeoffsbetween high and low complexity receivers. For this purposewe determine the performance of coherent, non-coherent andmismatched (e.g., non-coherent detection using templatesconsisting of a single path) demodulators. We take intoaccount the influence of the frequency response of the antennasystem and the effects of the frequency selectivity of themultipath channel. Given a specific channel condition, wederive expressions for the bit error rate for coherent, noncoherentand mismatched reception of correlated FSK signalswith unequal energies, and calculate the signal-to-noise ratio(SNR) degradation for different receiver's complexities with agiven FSK frequency deviation We show that UWB-FSK has aSNR degradation similar to other low-complexity receiversstudied in the literature.

Keywords

UWB, FSK, multipath channels

Disciplines

Engineering | Signal Processing | Systems and Communications

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