Performance of Multiband OFDM Systems with Extra Diversity

Jee-Hyun KIM  Sang-Tae KIM  Hyoung-Kyu SONG  Young-Hwan YOU  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E91-A   No.5   pp.1293-1295
Publication Date: 2008/05/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e91-a.5.1293
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Communication Theory and Signals
multiband OFDM,  ultra-wideband,  frequency diversity,  

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This letter presents the performance of ultra-wideband multi-band orthogonal frequency division multiplexing (UWB MB-OFDM) systems with an extra diversity. To fully obtain diversity gain in the current MB-OFDM system when a time-domain spreading (TDS) is adopted, two consecutive OFDM symbols are designed to be cyclic shifted against each other. Simulation results indicate that the MB-OFDM system using additional frequency diversity outperforms conventional MB-OFDM system.