Adaptive noncoherent linear minimum ISI equalization for MDAPSK signals

TitleAdaptive noncoherent linear minimum ISI equalization for MDAPSK signals
Publication TypeConference Paper
Year of Publication2000
AuthorsSchober, R., W. H. Gerstacker, and J. B. Huber
Conference NameCommunications, 2000. ICC 2000. 2000 IEEE International Conference on
Pagination1681 -1686 vol.3
Keywordsadaptive equalisers, adaptive noncoherent linear minimum ISI equalization, amplitude shift keying, decision-feedback differential detector, differential detection, differential phase shift keying, digital simulation, eigenvalue problem, equalizer output signal, feedback, frequency offset robustness, intersymbol interference, least mean squares methods, M-ary differential amplitude/phase-shift keying, M-ary differential phase-shift keying, MDAPSK signals, modified least-mean-square algorithm, modified LMS algorithm, optimum equalizer coefficients, performance, recursive adaptation, simulations
Abstract

A novel noncoherent linear equalization scheme is introduced and analyzed. The proposed scheme is not only applicable for M-ary differential phase-shift keying (MDPSK) but also for M-ary differential amplitude/phase-shift keying (MDAPSK) and minimizes the variance of intersymbol interference (ISI) in the equalizer output signal. The optimum equalizer coefficients may be calculated directly from an eigenvalue problem. For an efficient recursive adaptation of the equalizer coefficients, a modified least-mean-square (LMS) algorithm is proposed. Simulations confirm the good performance of the considered noncoherent equalization scheme and its robustness against frequency offset

URLhttp://dx.doi.org/10.1109/ICC.2000.853780
DOI10.1109/ICC.2000.853780

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