摘要
在多光束发射系统中,发送天线获得信道状态信息能够提高信道增益,有效克服大气湍流对星地激光通信的影响,提高系统的误码率性能。文章提出一种基于信道互易理论让发送天线获得信道状态信息的方法,然后根据信道状态信息,对发送光束进行最优选择,提高发射功率的利用率,改善信噪比,降低误码率。仿真结果表明,在发送端对发送天线进行最优选择,能够降低星地激光通信的误码率,提高通信系统的性能。
In multi-beam transmission system, transmitting antenna obtains channel state information to improve the channel gain, which can effectively overcome the atmospheric turbulence on satellite-ground laser communication, and enhance BER performance of the system. In this paper, transmitting antenna gets the channel state information（CSI） based on the channel reciprocity theory, and then the optimal choice for the transmission beam according to the CSI increases the transmission power efficiency,which is able to improve SNR and reduce the BER.The simulation results show that the transmitting antenna of optimal selection can reduce the BER of the satellite-ground laser communication, which can significantly improve the communication performance of the system.
出处
《现代电信科技》
2013年第10期43-47,共5页
Modern Science & Technology of Telecommunications
