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A Laser Carrier Heterodyne DPSK System's Design in Free Space Optical Communications

Tao Zhang

Abstract

A coherent communication system in the free space optical communications is introduced,through the amplitude shift keying(ASK),frequency shift keying(FSK),phase shift keying(PSK),differential phase shift keying(DPSK) four kinds of coherent optical carrier modulation analysis and comparison,the simulation results that PSK modulation has better error performance,then a laser carrier heterodyne differential phase shift keying(DPSK) system is proposed.

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Available abstract

Key concepts: Frequency-shift keying, Keying, Heterodyne (poetry), Amplitude and phase-shift keying, Phase-shift keying, Amplitude-shift keying, Free-space optical communication, Computer science