论文部分内容阅读
由于远距离短波通信的复杂性,使得接收信号的幅度、相位发生剧烈的变化,这样在接收端就必须采用抗信道衰落的技术。各种抗衰落技术中,又属分集接收技术为最有效的抗击衰落的技术之一。针对一种远距离短波通信的多台站接收模型下,简单分析了分集技术下3种合并方式的性能,但由于分集接收实现过于复杂的缺点,参照该模型提出了一种在实际环境下易于实现的解码后合并方法,仿真给出了该方法的性能上下界,结果表明该方法在低信噪比环境下能够取得接近甚至优于3种分集合并的性能,给实际通信过程中合并方式的选择提出了有效的参考。
Due to the complexity of long-range shortwave communication, the amplitude and phase of the received signal undergo a drastic change, so anti-channel fading technology must be adopted at the receiving end. Among the various anti-fading technologies, it is also one of the most effective anti-fading technologies for diversity reception. Aiming at a multi-station receiving model of long-range shortwave communication, the performance of the three kinds of combining schemes under diversity technology is simply analyzed. However, due to the complexity of diversity receiving, this paper presents a new scheme that is easy to implement under real environment The results show that the proposed method can achieve near or even better performance than the three kinds of diversity combining in low signal-to-noise ratio environment, and the merging method in the actual communication Choose to put forward a valid reference.