Title :
Decision feedback differential phase detection of M-ary DPSK signals
Author :
Adach, Fumiyuki ; Sawahashi, Mamoru
Author_Institution :
Dept. of R&D, NTT Mobile Commun. Network Inc., Yokosuka, Japan
fDate :
5/1/1995 12:00:00 AM
Abstract :
Multiple-symbol differential phase detection (DFDPD) based on decision feedback of past detected symbols is presented for M-ary DPSK modulation. Adopting a Gaussian phase noise assumption, we obtain the a posteriori joint probability density function (PDF) of the outputs of L DPD defectors of orders of 1 to L symbols and derive a DF-DPD algorithm which is based on feeding back the L-1 past detected symbols and minimizing the sum of phase errors of L DPD detectors. A practical implementation of the DF-DPD receiver is presented that uses a single conventional (one-symbol) DPD detector. The bit error rate (BER) performance in an additive white Gaussian noise (AWGN) channel is analyzed taking into account decision error propagation. Performance improvements are evaluated by computer simulations in AWGN and Rayleigh fading channels
Keywords :
Gaussian channels; Rayleigh channels; automatic repeat request; demodulation; differential phase shift keying; error statistics; fading; phase noise; radio receivers; signal detection; AWGN channel; BER performance; DF-DPD receiver; Gaussian phase noise; M-ary DPSK signals; Rayleigh fading channels; additive white Gaussian noise; bit error rate; computer simulation; decision error propagation; decision feedback; multiple-symbol differential phase detection; past detected symbols; performance; phase errors; probability density function; AWGN; Bit error rate; Computer errors; Detectors; Differential quadrature phase shift keying; Feedback; Phase detection; Phase modulation; Phase noise; Probability density function;
Journal_Title :
Vehicular Technology, IEEE Transactions on
