Laser & Optoelectronics Progress, Volume. 60, Issue 1, 0103001(2023)
Quadrature Phase Shift Keying Coherent Receiving Technology Based on Field Programmable Gate Array
Coherent laser communication has the advantages of high speed and long-distance transmission capabilities, both of which play an important role in inter-satellite communication. A coherent optical communication system makes full use of information on light intensity, phase, frequency, and polarization, which cannot only improve the efficiency of frequency band utilization, but also extend the relay distance across which optical communication is possible. As a type of multi band modulation, quadrature phase shift keying (QPSK) modulation and demodulation can greatly improve the utilization of spectrum resources. Aiming to resolve the problem of the response rate of QPSK modulation and demodulation in coherent optical laser communication, an improved Costas loop is proposed in this study. The results of the experiment verify the entire QPSK modulation and demodulation system and the performance feasibility of the improved Costas loop.
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Baishuo Zhang, Yansong Song, Lei Xiao, Dechun Zhao. Quadrature Phase Shift Keying Coherent Receiving Technology Based on Field Programmable Gate Array[J]. Laser & Optoelectronics Progress, 2023, 60(1): 0103001
Category: COHERENCE OPTICS AND STATISTICAL OPTICS
Received: Sep. 30, 2021
Accepted: Nov. 29, 2021
Published Online: Dec. 5, 2022
The Author Email: Song Yansong (654799650@qq.com)