把消息转换成电信号。信源可分为模拟信源和数字信源。区分模拟信号和数字信号的准绳是看其取值是连续的还是离散的，而不是看时间。 信源编码：主要是利用信源的统计特性，解决信源的相关性，去掉信源冗余信息，提高系统有效性的目的。 信道编码：保证通信系统的传输可靠性，克服信道中的噪声和干扰。 调制：其主要目的是使经过编码的信号特性与-The message into electrical signals. Source can be divided into analog source and

matlab方程，一帧一帧读video frame的-For continuous-time systems, the system is converted to discrete time with a sample time of dt=t(2)-t(1)

离散时间信号的傅立叶变换的各个例子的算法,很不错的,希望对大家有用-The example of discrete time signals of Fourier transform algorithm, very good, hope useful for everyone

离散时间信号的傅立叶变换的各个例子的算法,很不错的,希望对大家有用-The example of discrete time signals of Fourier transform algorithm, very good, hope useful for everyone