论文部分内容阅读
本文主要由两部分组成: 首先研究了水面传输时选择性衰落对数字微波120路系统的影响;利用广义函数的概念把衰落模型从频域变到时域,简化了系统模型,进行了计算机模拟得出了有选择性衰落时数字微波系统的均方误差曲线和准“特征”曲线。然后探讨了数字微波自适应均衡器常用的迫零算法和最小均方误差准则之间的关系;根据计算机模拟的结果,提出了一种用于数字微波的自适应均衡器结构,并比较了同步解调
This paper mainly consists of two parts: Firstly, the influence of selective fading on 120-channel digital microwave system is studied. By using the concept of generalized function, the fading model is changed from frequency domain to time domain, the system model is simplified and the computer simulation The mean square error curve and quasi-characteristic curve of digital microwave system with selective fading are obtained. Then the relationship between zero-forcing algorithm and minimum mean square error criterion commonly used in digital microwave adaptive equalizer is discussed. According to the result of computer simulation, an adaptive equalizer structure for digital microwave is proposed, and the synchronization demodulation