Real-Time Algorithm for Low-Orbit Satellite Laser Communication(Invited)
We optimized the clock recovery algorithm and forward error correction code to address the challenges associated with an autonomous clock source and intricate transmission channel in a real-time,low-power-consumption scenario for low-orbit satellite laser communication.The successful implementation of this optimization includes an all-digital clock recovery algorithm and a low-density parity check(LDPC)compilation code,demonstrating minimal resource consumption,low latency,and power consumption of only 0.129 W and 1.199 W,respectively.Subsequently,we constructed a desktop demonstration system that effectively showcases real-time spatial optical transmission using binary phase shift keying(BPSK)modulation and coherent detection at a communication rate of 1.024 Gbit/s.Notably,the clock error in this system is approximately 1.50×10-4.This achievement reflects a fine balance between performance and efficiency in the context of low-orbit satellite laser communication.
low-orbit satellitecoherent optical communicationreal-timelow power consumption
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