A Sample Diversity Decision-Feedback-Equalisation For Multipath Channels

Abstract

A new Decision-Feedback-Equalisation (DFE) technique is introduced, namely, the Sample-Diversity (SD) DFE. To realise a sample-diversity at the DFE input,N samples are taken from each symbol and these samples are used to drive N different DFE’s. A simple selection mechanism is introduced to select the best sampling phase and DFE to be used in the tracking mode. Through simulations, for normalized-rms-delay-spread over the range from 0.01 to 1, the SDDFE is shown to have a much better performance than a conventional DFE. Being a combination of diversity and equalisation techniques, the SD approach is shown as a promising technique for symbol detection in multipath fading channels.