Study of Performance Improvement of SC-FDE Using Duobinary Partial Response Filter

Abstract Frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion significantly improves the bit error rate (BER) performance of single-carrier (SC) transmission by suppressing the channel frequency-selectivity. Partial response (PR) filtering achieves higher spectral efficiency by permitting certain amount of inter-symbol interference (ISI). However, employing the MMSE-FDE solely is not sufficient to mitigate the effect of such amount of ISI occurred from PR filtering, and hence BER performance degrades. To reduce the effect of ISI, we introduce the SC-FDE transmission using duobinary PR filtering, together with either frequency-domain iterative ISI cancellation or time-domain maximum likelihood sequence estimation (MLSE) .Performance evaluation in terms of BER is evaluated by computer simulation. Keyword Frequency-domain equalization,Partial response filter,Frequency-domain ISI cancellation,MLSE

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