一种用于卫星通信的空间分集信号合成方法  

Method of space diversity signal combination for satellite communication

作　　者：高超垒[1] 宋振宇[1] 战勇杰[1] 

机构地区：[1]北京卫星信息工程研究所,北京100086

出　　处：《电子技术应用》2013年第12期111-113,117,共4页Application of Electronic Technique

摘　　要：简要地介绍了卫星通信中宽带信号空间分集合成技术的信号处理方法。对合成方法、时域均衡等方面进行了分析研究。在现有的自适应判决反馈均衡器(DFE)的基础上,提出了一种改进的均衡结构,使其适用于高速数据的接收。提出了一种LMS算法来实现最大信噪比合成。此方法无需信噪比估计,可自适应地更新信号合成系数。仿真结果表明,通过该合成方法获得的合成效果与理论值相比存在0.3 dB以下的损失,但系统仍能在-3 dB信噪比的条件下正常工作。该合成方法可应用于高数据速率卫星通信中。This paper briefly introduces the signal process method of the broadband space diversity signal combining techniques for satellite communications. It analyzes the aspects of the method of signal combination and equalization techniques. It put forward an improved method based on DFE for equalization, in order to be applied in the condition of high data rate. It also put forward an MRC method by LMS algorithm for signal combination. It do not need to estimate the SNR of every signal, and could adaptive- ly update coefficient of signal combination. Simulation results show that the signal combination effect by this method compared with the theoretical value has 0.3 dB loss, but the system can still work in the SNR is -3 dB conditions. This signal combination method can be applied to satellite communications with high data rate.

关 键 词：空间分集 信号合成 时域均衡 

分 类 号：TN911.23[电子电信—通信与信息系统]