Limiter-discriminator detection of a coherent optical heterodyne M-ary CPFSK receiver

Author

Zhang, Xiupu ; Jiang, Peixuan

Author_Institution

Dept. of Radio Eng., Beijing Univ. of Posts & Telecommun., China

Volume

10

Issue

8

fYear

1992

fDate

8/1/1992 12:00:00 AM

Firstpage

1127

Lastpage

1131

Abstract

The performance of a coherent optical M-ary continuous-phase frequency-shift-keying (CPFSK) receiver using limiter-discriminator (L-D) detection is investigated. It is shown that L-D detection of CPFSK optical signals offers the best performance for a large normalized IF beat spectral linewidth, ΔνT. When the modulation index is unity, the receiver is immune to laser phase noise and can produce (M/4) exp (-SNR) symbol error probability, which may be considered as the upper bound if the optimal modulation index is used (SNR is the signal-to-noise ratio per symbol). Optimum modulation indexes are 0.8 and 1 at ΔνT=1% and ΔνT=2%, respectively, for M=4, 8, and 16

Keywords

discriminators; frequency shift keying; limiters; optical communication equipment; optical modulation; IF beat spectral linewidth; coherent optical heterodyne M-ary CPFSK receiver; continuous-phase frequency-shift-keying; laser phase noise; modulation index; optical signals; signal-to-noise ratio per symbol; symbol error probability; upper bound; Error probability; Frequency; Laser noise; Optical detectors; Optical mixing; Optical modulation; Optical noise; Optical receivers; Phase noise; Signal to noise ratio;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.156854

Filename

156854