基于Simulink的匹配滤波器设计设计报告

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通信系统课程设计报告

匹配滤波器设计

摘要

在数字通信系统中，滤波器是其中重要部件之一，滤波器特性的选择直接影响数字信号的恢复。在数字信号接收中，滤波器的作用有两个方面：使滤波器输出有用信号成分尽可能强；抑制信号带外噪声，使滤波器输出噪声成分尽可能小，减小噪声对信号判决的影响。通信系统的误码率与输出的信噪比有关，接收端输出信噪比越大，则系统的误码率越小。因此，如果在每次判决前，输出的信噪比都是最大的，则该系统一定是误码率最小的系统。遵从这种考虑原则，，我们可以通过simulink对匹配滤波器进行模拟仿真。

关键词：匹配滤波器;Simulink;模拟;信噪比

Abstract

In a digital communication system, wherein the filter is one of the important means to select the filter characteristics directly affect the recovery of digital signals. In the digital signal reception, the role of the filter has two aspects: the filter output as strong useful signal components; suppress signal band noise, the filter output noise components as small as possible, to reduce the impact of noise on the signal judgment . Signal to noise ratio and bit error rate on the output communication system, the receiver output signal to noise ratio, the smaller the system error rate. Thus, if each time before judgment, the output signal to noise ratio is the biggest, the system must be a minimum of system error rate. Comply with the principles of this consideration, we can through the matched filter simulink simulation.

Keywords: matched filter; Simulink; SNR

1.引言................................................................ - 1 -

2.课程设计目的........................................................ - 1 -

2.1目的....................................................................... - 1 -

2.2要求（设计任务）........................................................... - 1 -

2.2.1任务： ................................................................ - 1 -

2.2.2要求： ................................................................ - 1 - 3．分析（分析如何设计）：............................................. - 1 -

3.1理论....................................................................... - 1 -

3.2匹配滤波器应满足的条件：................................................... - 2 -

3.3匹配滤波器的设计........................................................... - 2 -

3.4匹配滤波器的方框图......................................................... - 3 -

4.仿真................................................................ - 3 -

4.1参数设置................................................................... - 4 -

4.2仿真结果................................................................... - 7 -

4.3结论：..................................................................... - 7 -

4.4匹配滤波器电路的接受原理分析：............................................. - 7 - 5．总结............................................................... - 8 -参考文献.............................................................. - 9 -

基于Simulink的匹配滤波器设计 设计报告

基于Simulink的匹配滤波器设计设计报告