AWGN噪声中正弦信号的检测与仿真

文档编号:DZXX049  文档字数:8228,页数:22

摘要

 随着技术的发展,现代无线通信系统功能日趋强大,性能指标越来越高,无线通信系统越来越复杂其工作的过程描述又很抽象。与此相对应的是,研制费用不断上升,对各部分及系统的研究变得更加困难。如果无线通信系统的研究全部用实际设备来实现,人力、物力、财力花费都是巨大的,而且研制周期也会增加,此外有的研究实际的设备也不一定能有效地实现。因此,通信信号模拟仿真以其经济、灵活和逼真等特点逐渐成为通信系统的设计分析过程中不可或缺的手段。
   本文第一章主要讲述了通信系统的检测和仿真的重要性。第二章主要从理论层次上论述了通信中信号在AWGN噪声中的检测的方法，具体的以ASK信号为模型，通过对其最佳接收机的建立和最优判决门限的设定，得到信号的检测目的。最后第三章介绍了system view软件虚拟仪器建立的方法，进行ASK信号进行的仿真检测，验证理论的正确性。

关键词： AWGN，ASK，System View，仿真分析

ABSTRACT

 With the development of technology, the functions of modern wireless communication system are becoming much stronger and the performance index of wireless are much higher. Complexity of communication system is increasing and the procedure description is very abstract. Corresponding to this, the cost of development is increase and the system of each part of the study become much more difficult. If the study of a wireless communication system to achieve with full practical equipment, ,not only costs of human、 material and financial resources are huge, but also increases the development cycle, besides some research facilities are not can effectively achieve. Therefore, analysis process plays an important part in design of communication system because of its economic simulation, flexible and lifelike features.
 This first chapter described the importance of testing and simulation in communication system basically. The second chapter basically discussed the method to detect sinusoidal signal with AWGN noise, as ASK signals for example. This chapter also described how to calculate or set the best judgment threshold of receiver. The third chapter presented the method to detect and simulate signal using System View .The result of simulation is in accordance with the theory..

Keywords: AWGN, ASK, System View, Simulation

 目录
摘要 I
ABSTRACT II
第1章 引言 1
 1.1研究的背景 1
 1.1.1 理论背景 1
 1.1.2 仿真背景 2
 1.2 研究内容 2
第2章 理论分析 4
 2.1 接收机模型 4
 2.2 信号的匹配滤波器 5
 2.3 信号的判决门限 6
 2.4最佳差错性能 7
 2.5 ASK系统的误码率 8
第3章 系统软件设计 11
 3.1动态系统仿真软件System View简介 11
 3.2 System View软件进行通信系统的动态仿真步骤 11
 3.3 系统的分步说明 11
 3.3.1 积分清除滤波器 11
 3.3.2 重采样 12
 3.3.3 门限判决 12
 3.4 系统设计 13
 3.4.1 说明 13
 3.4.2 定时与参数设置 13
 3.4.3 全局参数关联 14
 3.4.4 系统图 15
 3.5 仿真分析 15
 3.6 FSK仿真结果 16
第4章 系统设计总结 17
致谢 18
参考文献 19

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