摘要
短波天波传播存在严重的多径效应。在短波扩频通信中,采用Rake接收技术可利用多径信号的有效能量提高输出信噪比,改善短波通信质量。Rake接收的关键在于多径信号的识别和分离,论文针对短波信道传播特性,对短波扩频通信中的Rake接收技术进行了研究,设计了有效的多径分离和合并方法,仿真结果表明采用Rake接收技术后,误比特性能有了明显的改善。
Serious multi-path effect exists in HF sky-wave propagation. In HF spread spectrum communication, Rake receive technology can be used, through utilizing the effective energy of multi-path signal, to improve output SNR and the quality of HF communication. The identified and separated multi-path signal is the key of the Rake receive technology. In this paper, according to the propagation characteristics of HF channel, Rake receive technology in HF spread spectrum communication is studied, and the effective methods for separation and combination of multi-path are designed. The simulation indicates that the BER is obviously improved by the adoption of Rake receive technology.
出处
《信息安全与通信保密》
2007年第6期77-80,共4页
Information Security and Communications Privacy
关键词
短波通信
RAKE接收技术
多径分离
多径合并
HF communication
Rake receive technology
multi-path separation
multi-path combination
