Adaptive linear equalization combined with noncoherent detection for MDPSK signals

TitleAdaptive linear equalization combined with noncoherent detection for MDPSK signals
Publication TypeJournal Article
Year of Publication2000
AuthorsSchober, R., W. H. Gerstacker, and J. B. Huber
JournalCommunications, IEEE Transactions on
Pagination733 -738
Date Publishedmay.
Keywordsadaptive equalisers, adaptive linear equalization, coherent linear MMSE equalizer, decision-feedback differential detector, differential phase shift keying, equalizer coefficients, feedback, feedback symbols, intersymbol interference, intersymbol interference channels, least mean squares methods, M-ary differential phase-shift keying, MDPSK signals, minimum mean-squared-error equalizer, modified least mean square algorithm, modified LMS algorithm, modified recursive least squares algorithm, modified RLS algorithm, noncoherent detection, noncoherent receiver, optimum equalizer coefficients, receiver performance, signal detection

A novel noncoherent receiver for M-ary differential phase-shift keying signals transmitted over intersymbol interference channels is presented. The noncoherent receiver consists of a linear equalizer and a decision-feedback differential detector. A significant performance gain over a previously proposed noncoherent receiver can be observed. For an infinite number of feedback symbols, the optimum equalizer coefficients can be calculated analytically, and the performance of the proposed receiver approaches that of a coherent linear minimum mean-squared-error equalizer. Moreover, a modified least mean square and a modified recursive least squares algorithm for adaptation of the equalizer coefficients are discussed


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