On the optimality of classical coherent receivers of differentially encoded M-PSK

Author

Simon, Marvin K. ; Divsalar, Dariush

Author_Institution

Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA

Volume

1

Issue

3

fYear

1997

fDate

5/1/1997 12:00:00 AM

Firstpage

67

Lastpage

70

Abstract

This paper demonstrates that the classical receiver used for coherent detection of differentially encoded M-ary phase-shift keying (M-PSK), namely, the one that makes optimum coherent decisions on two successive symbol phases and then differences these to arrive at a decision on the information phase is suboptimum when M>2. However, this receiver structure can be arrived at by a suitable approximation of the likelihood function used to derive the true optimum receiver whose structure is also given.

Keywords

approximation theory; demodulation; differential phase shift keying; maximum likelihood estimation; receivers; signal detection; M-PSK modulation; MAP approach; classical receiver; coherent detection; coherent receivers; differentially encoded M-ary phase-shift keying; information phase; likelihood function approximation; optimality; optimum coherent decisions; optimum receiver; successive symbol phases; AWGN; Additive white noise; Demodulation; Encoding; Logic; Phase detection; Phase modulation; Phase shift keying; Tracking loops; Transmitters;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.585799

Filename

585799