摘要
卫星成对载波多址技术可使2个卫星终端在同一时间使用相同频带实现通信,从而使频率资源利用率倍增。然而随着频率资源的匮乏,卫星成对载波多址系统可能没有授权频谱可用。针对这一状况,提出了干扰受限的卫星成对载波多址系统。该系统在不对授权频谱用户产生有害干扰的情况下,占用该频段进行信息的传输。此外,对干扰受限的卫星成对载波系统在瑞利信道下的中断概率进行了分析,得到了近似闭式解,从而为实际系统提供有价值的理论参考。
Two satellite terminals can communicate with each other simultaneously within the same frequency band u- sing paired carrier multiple access （PCMA） technology, whichmakes the utilization rate of frequency doubled correspond- ingly. However, due to the lack of the frequency resources, PCMA systems may not have authorized frequency bands. To solve this problem,the interference-limited PCMA systems are proposed. The system transmits massages by occupying fre- quency resources of other authorized systems while the interference is permitted. Furthermore, the outage probability of the system is derived and analyzed in Rayleigh channel and the approximated closed-form expression is obtained, which provides valuable reference for practical systems.
出处
《空间电子技术》
2015年第4期15-18,共4页
Space Electronic Technology
关键词
卫星通信系统
成对载波
频谱共享
中断概率
Satellite communications system
Paired carrier multiple access
Spectrum sharing
Outage probability
