基于labview的数字通信系统.docVIP

摘 要 本文主要研究内容是基于LABVIEW的通信原理系统仿真，不单介绍了虚拟仪器的概念和LABVIEW仿真环境，并详细阐述了基于LABVIEW软件对通信系统的部分过程进行仿真的设计过程。首先对信号发生器进行了原理分析和设计，通过信号发生器可以产生正弦波、方波、三角波、直流信号和斜波几种基本信号波形；接着对频谱分析仪进行了原理分析和设计，对正弦波、锯齿波、方波和三角波的频谱通过傅里叶变换进行了分析；然后对数字带通传输系统中的二进制数字调制的过程进行仿真，其中包括二进制振幅键控调制(2ASK)、二进制频移键控调制和二进制相移键控调制(2PSK)。并且对正交振幅调制的过程进行了设计，从而实现了正弦载波数字调制；最后利用LABVIEW软件对整个系统的设计进行分析和显示，将整个系统的仿真过程和结果完整，准确地表述了出来。 关键词：LABVIEW；信号发生器；频谱分析；二进制数字调制；正交振幅调制 Abstract In this paper communication principle system based on LABVIEW is mainly investigated. It not only introduces the concept of virtual instrument and the LABVIEW software, but also state part of the process of communication system simulation based on the software. First of all ,this paper analyses the signal generator principle and designes the process of simulation. Through the signal generator can generate sine wave, square wave, triangle wave, the dc signal and oblique wave several basic signal waveform. Then the principle of spectrum analyzer is analysed and design the mathod of sine wave, sawtooth wave, square wave and the spectrum of the triangle wave by the analysis of Fourier transform .And then this paper introduce the process of simulation to the digital modulation kind of binary,which includes binary frequency shife keying, binary amplitude shife keying and phase shift keying .It also introduce the design process of orthogonal amplitude modulation which fulfilling the sine carrier digital modulation. Finally,the paper analyses the whole system design analysis and display by the LABVIEW software. easy to debug and other advantages, the process of simulation of the system and the results.The whole system and the results of the simulation process is complete and accurate to express out. Keywords:LABVIEW; Signal generator; Spectrum analysis; Binary digital modulation; Orthogonal amplitude modulation 目 录 摘 要 I Abstract II 1 引言 1 1.1 研究的目的和意义 1 1.2 该课题目前的现状 2 1.3 研究的内容及具体安排 2 2 LABVIEW功能介绍 4 2.1 LABVIEW简介 4 2.1.1 LABVIEW概述 4 2.1.2 虚拟仪器VI概述 5 2.1.3