DocumentCode :
1482912
Title :
The effect of error control coding in multichannel FSK coherent lightwave communication systems influenced by laser phase noise
Author :
Hao, Miin-Jong ; Wicker, Stephen B.
Author_Institution :
Nat. Kaohsiung Inst. of Technol., Taiwan
Volume :
14
Issue :
12
fYear :
1996
fDate :
12/1/1996 12:00:00 AM
Firstpage :
2648
Lastpage :
2656
Abstract :
It has been shown that coherent optical fiber receivers with a two-filter structure (TFS) consisting of a wide-band IF filter and a narrow-band postdetection filter are less susceptible to the influence of phase noise. However, the expanded IF bandwidth required to achieve optimum sensitivity performance is large, particularly in multichannel FSK systems. Forward error control coding can relax the laser linewidth requirement and improve receiver sensitivity. In this paper a multichannel asynchronous FSK scheme equipped with (31, k) Reed-Solomon codes is used to verify the coding benefit. A systematic error probability analysis is developed and a stable and accurate performance evaluation procedure is provided. The sensitivity penalties due to the combined phase noise and interchannel crosstalk for both coded and uncoded systems are calculated for comparison. The results show that the performance reduction due to phase noise can be largely alleviated by choosing a proper code rate and an optimum value of the expanded IF bandwidth
Keywords :
Reed-Solomon codes; encoding; frequency division multiplexing; frequency shift keying; optical filters; optical modulation; optical noise; optical receivers; phase noise; sensitivity; IF bandwidth; Reed-Solomon codes; coding benefit; coherent optical fiber receivers; error control coding; forward error control coding; interchannel crosstalk; laser linewidth requirement; laser phase noise; multichannel FSK coherent lightwave communication systems; multichannel FSK systems; multichannel asynchronous FSK scheme; narrow-band postdetection filter; optimum sensitivity; performance evaluation procedure; phase noise; receiver sensitivity; sensitivity penalties; stable; systematic error probability analysis; two-filter structure; wide-band IF filter; Bandwidth; Error correction; Frequency shift keying; Laser noise; Narrowband; Optical fiber filters; Optical fibers; Optical receivers; Phase noise; Wideband;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/50.545783
Filename :
545783
Link To Document :
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