探空火箭通信系统最优信噪比切换阈值的设计

Subjects: Geosciences >> Space Physics submitted time 2016-05-13

陈萍 熊蔚明 于世强 陈志敏

Abstract： Combining with Nakagami fading channel model,Rayleigh channels and Rician channels were analyzed between sounding rockets and ground station during the flight course.It takes an example of a variable modulation system with four types of modulations,including BPSK,QPSK,16QAM and 64QAM,and proposes a method to acquire the optimum signal-to-noise ratio switch threshold,according to different elevation angles of ground receiving station. The optimum threshold could maximize the throughput,while satisfying BER goal.Furthermore, the paper analyzes and compares the throughput difference with optimum signal-to-noise ratio switch threshold,BPSK modulation method and constant-BER signal-to noise ratio threshold. The results show that,by adoption of the optimum threshold,system throughput is 3.89 times and 1.043 times higher than the other two methods,respectively. The results could provide reference and basis for the application of variable modulation technology into practical sounding rockets projects.

Peer Review Status:Awaiting Review

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