Title :
Channel coding for coherent lightwave binary FSK communications
Author :
Golanbari, Michael ; Fonseka, John P.
Author_Institution :
Sch. of Eng. & Comput. Sci., Texas Univ., Dallas, TX, USA
Abstract :
The authors evaluate the performance of several channel coding schemes for a weakly coherent optical communications system that employs binary frequency shift keying (FSK). For the detection of signals, a double-filtering receiver structure is considered. Numerical results computed for BCH codes, Reed-Solomon codes, convolutional codes, and a concatenated code show that coding can provide a very economical solution for greatly improving the performance of such a system and for making it widely tolerant to laser phase noise. The codes evaluated demonstrated that the effects of various system impairments, such as laser phase noise and AWGN (additive white Gaussian noise), can be successfully ameliorated, providing significant relaxation of various system requirements such as SNR (signal-to-noise ratio), IF (intermediate frequency) filter bandwidth, and laser linewidth
Keywords :
encoding; error correction codes; frequency shift keying; light coherence; optical links; AWGN; BCH codes; BFSK; IF filter bandwidth; Reed-Solomon codes; SNR; additive white Gaussian noise; binary FSK; binary frequency shift keying; channel coding; coherent optical communications system; concatenated code; convolutional codes; double-filtering receiver structure; intermediate frequency; laser linewidth; laser phase noise; signal detection; signal-to-noise ratio; AWGN; Channel coding; Frequency shift keying; Laser noise; Optical fiber communication; Optical receivers; Phase noise; Reed-Solomon codes; Signal detection; Signal to noise ratio;
Conference_Titel :
Global Telecommunications Conference, 1991. GLOBECOM '91. 'Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-87942-697-7
DOI :
10.1109/GLOCOM.1991.188420
