Coded Aperture compressive high dynamic range modulation for laser communication

Laser communication technology plays an important role in the aerospace application, such as deep-space exploration relay communication, satellite-to-ground quantum communication, gravitational wave measurement and so on. All of those are based on the establishment of satellite-to-ground high-speed laser communication link, which needs to maintain high speed, high precision and high sensitivity. Also that is an enormous challenge in scenarios like high dynamic range, low signal-to-noise ratio(SNR), high-speed movement, high-precision tracking, etc. This paper proposes a method of dynamic range compressive modulation with coded aperture to improve the accuracy, rate and sensitivity of signal acquisition in high-speed laser communication links. Furthermore, the method can improve effectively the performance of Acquisition, Tracking and Pointing (ATP). Finally, the proposed method was verified by the simulation experiment with well-designed region of interest(ROI) modulation matrix, which provides the more opportunity and possibility for its wide application.