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The performance of fast frequency hopping OFDM (FFH-OFDM) is evaluated under UWB channels with several types of receivers. It is shown that FFH-OFDM has a significant improvement over a conventional OFDM system. The receiver algorithms for the FFH-OFDM considered in this paper are zero-forcing (ZF), minimum mean square error (MMSE), QR- MMSE and sorted QR-MMSE (SQR-MMSE). Soft-output metric computation...
Fast frequency hopping OFDM (FFH-OFDM) is a recently proposed concept to enhance conventional OFDM performance without using channel coding by fully exploiting frequency diversity available within one OFDM symbol. Previously, a linear receiver of FFH-OFDM requires zero-forcing (ZF) or minimum mean squared error (MMSE) detection algorithm. This paper introduces QR-based receivers for FFH-OFDM systems...
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