Title :
Optimum CPFSK systems with postdetection filtering and better than matched filter performance
Author_Institution :
Telecomm. Res. Lab., Horsholm, Denmark
Abstract :
A rigorous theoretical model for CPFSK receivers with post-detection filtering is presented. The sensitivity is within 0.3 dB of the best result (i.e. 36 received photons for a 10-9 error probability) for modulation index between 1.5 and 5. The sensitivity is better than the matched filter sensitivity in some cases. The phase noise tolerance is significantly improved.
Keywords :
filtering and prediction theory; frequency shift keying; noise; optical filters; optical receivers; CPFSK receivers; matched filter sensitivity; modulation index; optical bandpass filtering; phase noise tolerance; postdetection filtering; preamplification; sensitivity; theoretical model;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921479
