抑制载波边带幅度的调制和解调的实现.docVIP

毕 业 设 计 论 文 题目 抑制载波双边带幅度的调制和解调的实现 院（系部） 专业名称 学生姓名 学生学号 指导教师 摘 要 我们知道，由各种信号源所产生的基带信号并不能在大多数信道内直接传输,而是需要经过调制之后再送到信道中去.在接收端就必须通过相反的过程,即调制或解调.调制是使信号m(t)控制载波的某一个（或几个）参数，使这个参数按照信号m(t)的规律变化的过程。载波可以是正弦波或脉冲序列。在AM信号中载波分量并不携带信息，信息完全由边带传送。如果将载波抑制，不附加直流分量，既可以得到抑制载波双边带信号，简称双边带信号（DSB）。而从高频信号中恢复出调制信号的过程又叫做解调.MATLAB软件是美国mathworks公司出品的商业数学软件，用于数学开发，数学可视化，数据分析以及数值计算的高级技术计算语言和交互式环境，它主要包括MATLAB和Simulink两大部分。 本文主要研究了在通信原理中和软件MATLAB中调幅和解调的原理以及为何进行解调的问题。本文着重研究了抑制载波双边带调幅和解调的问题，并通过运用MATLAB软件进行仿真模拟，加深了对所学通信原理知识的理解，并熟悉了MATLAB软件的运行环境。 关键词： 调制、解调、抑制载波双边带、信号、MATLAB、仿真 ABSTRACT We know, generated by various sources of baseband signal and cannot be transmitted directly in most channels, but need to go through the modulation in later sent to the channel. In the receiver must through the opposite process, namely the demodulation or modulation modulation signal are the M (T) and control one (or carrier a few) parameters, make this parameter according to the signals of M (T) process of change. The carrier can be sine wave or pulse sequence. In the AM signal carrier component does not carry information, information completely by the sideband transmission. If the carrier suppression, no additional DC component, which can get double sideband suppressed carrier signal, referred to as the double-sideband signal (DSB). And from the high-frequency signal recovery process of modulation signal demodulation of.MATLAB software is also called the United States of America commercial mathematical software produced by MathWorks company, used in mathematics development, mathematics visualization, data analysis and numerical calculation of senior technical computing language and interactive environment, it mainly includes two parts of MATLAB and Simulink. This paper mainly studied on the principle of amplitude modulation in the MATLAB and software of the communication principle and demodulation and the problem of why the demodulation. This paper focuses on the pr