Compensating frequency drift in DPSK systems via baseband signal processing

Author

Choi, Zae Yong ; Lee, Yong Hoon

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea

Volume

45

Issue

8

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

921

Lastpage

924

Abstract

A new baseband signal processing method for compensating frequency shift in differential phase-shift keying (DPSK) systems is introduced. This method consists of a signal processor for the initial acquisition of frequency shift and a simple adaptive equalizer for tracking. The former is based on the observation that the effect of frequency shift can be eliminated by using boundary values of the received baseband signal between symbol periods. The latter is a single tap equalizer employing the least mean-square (LMS) adaptation algorithm. Computer simulation results demonstrate that the proposed frequency shift compensation technique outperforms existing methods, and works well for a wide range of frequency shift

Keywords

adaptive equalisers; adaptive signal processing; demodulation; differential phase shift keying; least mean squares methods; signal processing; DPSK demodulation; DPSK systems; LMS; adaptive equalizer; baseband signal processing; boundary values; computer simulation results; differential phase-shift keying; frequency drift compensation; frequency shift acquisition; least mean-square adaptation algorithm; received baseband signal; signal processor; single tap equalizer; symbol periods; tracking; Adaptive equalizers; Adaptive signal processing; Baseband; Computer simulation; Differential phase shift keying; Differential quadrature phase shift keying; Frequency shift keying; Least squares approximation; Signal processing; Signal processing algorithms;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.618294

Filename

618294