Non-Guard Interval based and Genetic Algorithm Assisted Frequency Domain Equalization for DS-UWB Systems

A genetic algorithm (GA) based frequency domain equalization (FDE) scheme referred to as FDE-GA, which does not require a guard interval (GI), is proposed for direct sequence ultra wideband (DS-UWB) wireless communication systems and is shown to significantly outperform the RAKE receiver and the RAKE-GA receiver proposed in a previous work, in terms of bit error rate (BER) at a similar complexity. The FDE-GA structure achieves much higher bandwidth efficiency than conventional FDE methods, because the interblock-interference (IBI), as a result of the absence of GI, is removed effectively within each block before the GA. The effect of pilot symbols on the BER performance of the FDE-GA receiver is also investigated and presented in this work.

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