Decision-feedback differential demodulation of bit-interleaved coded MDPSK

TitleDecision-feedback differential demodulation of bit-interleaved coded MDPSK
Publication TypeJournal Article
Year of Publication1999
AuthorsLampe, L., and R. Schober
JournalElectronics Letters
Pagination2170 -2171
Date Publisheddec.
Keywordsautomatic repeat request, bit-interleaved coded MDPSK, calculated bit metric, channel state information, computational complexity, convolutional codes, decision-feedback differential demodulation, demodulation, differential phase shift keying, error correction, flat Rayleigh fading channels, interleaved codes, Iterative Decoding, M-ary differential phase shift keying, power efficiency gains, Rayleigh channels, Viterbi algorithm, Viterbi decoding

A novel simple receiver structure for M-ary differential phase shift keying (MDPSK) transmission over flat Rayleigh fading channels without channel state information is proposed. Convolutional codes are used for error correction and bit-interleaving as an appropriate means to combat the effects of fading, and the hard decisions of the Viterbi algorithm are fed back during the decoding process in order to improve the calculated bit metric. Iterative decoding with this decision-feedback differential demodulation, (DF-DM) results in significant power efficiency gains compared to those achieved using conventional differential demodulation, while the computational complexity remains low


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