CPFSK coherent optical receivers: impact of IF bandwidth and laser phase noise

26 May 1988

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 24 (11) , 715-717
https://doi.org/10.1049/el:19880484

Abstract

A detailed theoretical model for narrowband CPFSK receivers is presented. It accounts for the influence of IF bandwidth on the signal voltage, non-Gaussian statistics of the output noise, correlation between noise samples stemming from limited IF bandwidth, and the impact of laser phase noise. It is found that the IF bandwidth needed to avoid intersymbol interference is 2.2 times the bit rate for a modulation index of 1; it is higher for other modulation index values. The bit error ratio is within 1 dB of the shot noise limit for the modulation index of 1.

Keywords

OUTPUT NOISE
THEORETICAL MODEL
ISI
DIGITAL TRANSMISSION
BER
IF BANDWIDTH
CONTINUOUS PHASE FSK
INTERSYMBOL INTERFERENCE
BIT ERROR RATIO
LASER PHASE NOISE
SIGNAL VOLTAGE
NONGAUSSIAN STATISTICS
CPFSK COHERENT OPTICAL RECEIVERS

This publication has 0 references indexed in Scilit: