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在许多小型用户中,固定色迹“拓展频谱随机存取(SSRA)”卫星通信系统是一种引人注意的通信系统。由于该系统的信道是按雷分配的,故它可比同时存取的最大数量提供更多的用户。通过测量多路随机存取的收、发伪码的相位差,可不难测出卫星和地面站之间的距离。本文叙述了该系统的功能,用超高频ATS-I应答机进行卫星通信的试验结果,并讨沦了这一系统所惑兴趣的一些课题,如信道间的互相关噪声等。
Among many small users, the fixed-color track “Extended Spectrum Random Access (SSRA)” satellite communication system is an attractive communication system. Since the system’s channel is allocated by ray, it can provide more users than the maximum number of simultaneous accesses. By measuring the phase difference between multiple random access received and sent pseudo-code, it is not difficult to measure the distance between the satellite and the ground station. This paper describes the function of the system, the experimental results of satellite communication using the ultra-high frequency ATS-I transponder, and discusses some issues of interest to the system, such as cross-correlation noise between channels.