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| Title | Improving differential detection of MDPSK by nonlinear noise prediction and sequence estimation |
| Publication Type | Journal Article |
| Year of Publication | 1999 |
| Authors | Schober, R., W. H. Gerstacker, and J. B. Huber |
| Journal | Communications, IEEE Transactions on |
| Volume | 47 |
| Pagination | 1161 -1172 |
| Date Published | aug. |
| ISSN | 0090-6778 |
| Keywords | additive white Gaussian noise, AWGN channel, AWGN channels, decision feedback equalisers, decision-feedback equalization, delayed decision-feedback sequence estimation, delays, differential detection, differential phase shift keying, filtering theory, finite impulse response, FIR filters, flat fading, IIR filters, IIR prediction-error filter, infinite impulse response, M-ary differential phase-shift keying, MDPSK, noise, noncoherent low-complexity receivers, nonlinear filters, nonlinear noise prediction, nonlinear time-variant FIR filter, optimum coefficients, prediction theory, Rayleigh fading, received signal representation, receivers, Rician fading, sequence estimation, sequential estimation, simulations, transmitted symbol sequence |
| Abstract | A new technique is proposed to improve the performance of differential detection (DD) of M-ary differential phase-shift keying (MDPSK) significantly, applying sequence estimation. In order to obtain an appropriate representation of the received signal, a nonlinear time-variant finite impulse response or infinite impulse response prediction-error filter is used. For both filter structures the optimum coefficients are derived, assuming transmission over an additive white Gaussian noise (AWGN) channel. Delayed decision-feedback sequence estimation (DDFSE) is employed to estimate the transmitted symbol sequence. It is shown by simulations that even for decision-feedback equalization, which is a simple special case of DDFSE, a significant performance improvement of conventional DD under AWGN conditions results. In contrast to other noncoherent low-complexity receivers proposed in literature, this receiver is very robust under flat fading (Rayleigh and Ricean) conditions |
| URL | http://dx.doi.org/10.1109/26.780452 |
| DOI | 10.1109/26.780452 |