Title :
A regressive algorithm for multiple-symbol differential-detection of DPSK
Author :
Mei, Lin ; Boukli-Hacene, M. ; Padgett, Jay E.
Author_Institution :
Dept. of Electr. Eng., Polytech.. Univ., Brooklyn, NY, USA
Abstract :
Research in early 1990s showed that multiple-symbol demodulation of DPSK could provide a gain of 1 to 2 dB over conventional DPSK techniques. However, the demand on additional hardware is very high. We propose a regressive algorithm that takes advantages of the redundancy in the demodulated data to improve upon the “optimal” algorithm by Divsalar (1990). This algorithm also has two modes of operation, which cuts down the error propagation. By selecting only the most essential information needed in the maximum-likelihood differential-detection (ML-DD), it can also reduce the receiver hardware significantly. Computer simulation results are also presented. With reduced hardware complexity, our algorithm still outperforms the “optimal” ML-DD algorithm
Keywords :
demodulation; differential phase shift keying; maximum likelihood detection; DPSK; computer simulation results; demodulated data redundancy; error propagation; maximum-likelihood differential-detection; multiple-symbol demodulation; multiple-symbol differential-detection; optimal algorithm; receiver hardware; reduced hardware complexity; regressive algorithm; Bit error rate; Computer errors; Computer simulation; Demodulation; Differential phase shift keying; Differential quadrature phase shift keying; Hardware; Maximum likelihood detection; Phase modulation; Redundancy;
Conference_Titel :
Global Telecommunications Conference, 1997. GLOBECOM '97., IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-4198-8
DOI :
10.1109/GLOCOM.1997.632569
