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针对卫星通信系统的特点,研究了结合CDMA和随机接入协议的扩频随机接入方式。在卫星通信的传播时延较长和短数据通信为主的情况下,这种接入技术能根据分组数据等业务的不同需求,实现满足多优先级业务的接入。理论分析和仿真结果表明,这种接入技术可以提高系统的综合性能。
According to the characteristics of satellite communication system, we study the spread spectrum random access method combining CDMA with random access protocol. In the case of long propagation delay of satellite communications and short data communications, this access technology can provide access to multiple priority services according to the different needs of services such as packet data. Theoretical analysis and simulation results show that this access technology can improve the overall performance of the system.