Design and performance of cyclic delay diversity in UWB-OFDM systems

Authors:
Poramate Tarasak;Khiam-Boon Png;Xiaoming Peng;Francois Chin
Affiliations:
Institute for Infocomm Research, Singapore;Institute for Infocomm Research, Singapore;Institute for Infocomm Research, Singapore;Institute for Infocomm Research, Singapore
Venue:
EURASIP Journal on Wireless Communications and Networking
Year:
2008

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Abstract

This paper addresses cyclic delay diversity (CDD) in an ultra-wideband communication system based on orthogonal frequency division multiplexing (OFDM) technique. Symbol error rate and outage probability have been derived. It is shown that with only two transmit antennas, CDD effectively improves SER performance and reduces outage probability significantly especially when the channel delay spread is short. Both simulation and analytical results agree well in all considered cases. The selection of delay times for CDD is also addressed for some special cases.