Foward error correction and its impact on high-data-rate, free-space laser communication system design

Farhad Hemmati; Robert G. Marshalek; Dilip K. Paul

doi:10.1117/12.18200

1 July 1990 Foward error correction and its impact on high-data-rate, free-space laser communication system design

Farhad Hemmati, Robert G. Marshalek, Dilip K. Paul

Proceedings Volume 1218, Free-Space Laser Communication Technologies II; (1990) https://doi.org/10.1117/12.18200
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

This paper discusses the use of forward error correction (FEC) in a 300 to 1000 Mbit/s free-space optical communications link. It also considers the tradeoffs involved in applying block codes or convolutional codes, emphasizing the peak and average power limitations of GaAlAs diode laser sources. Direct-detection optical receivers are assumed throughout. The application of FEC technology to a high-data-rate optical communications system is discussed, including available coding gain, correction for both random errors and mispointing-induced burst errors, and electronic implementation difficulties. This is followed by a discussion of the major system benefits derivable from FEC. Consideration is given to using the available coding gain for reducing diode laser source power, aperture size, or fine tracking accuracy. Regarding optical system design, it is most favorable to apply the coding gain toward reducing diode laser power requirements.

Citation Download Citation

Farhad Hemmati, Robert G. Marshalek, and Dilip K. Paul "Foward error correction and its impact on high-data-rate, free-space laser communication system design", Proc. SPIE 1218, Free-Space Laser Communication Technologies II, (1 July 1990); https://doi.org/10.1117/12.18200

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