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matlab程序,可实现脉冲编码调制,模拟信号的数字传输:抽样、量化、编码-matlab program to achieve pulse code modulation, digital transmission of analog signals: sampling, quantization, coding
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脉冲编码调制(PCM)实现
编程实现PCM技术的三个过程:采样、量化与编码。
采样:低通连续信号采样,以 x=sin(200*t) m=x./(200*t) m=m.*m 为例说明低通采样定理,绘出信号时、频图形;带通连续信号采样,以x=sin(20*t) m=x./t 为例说明带通采样定理,绘出信号时、频图形。
量化:均匀量化,以幅度 的正弦信号为例实现为64级电平的均匀量化;非均匀量化,输入A律PCM编码器的正弦信号 ,采样序列为 ,将其进行PCM编码,给出编码器的输出码组序列
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构成不同频率的调制信号,从先验概率中采样,计算权重,代码里有很完整的注释和解释,包括AHP,因子分析,回归分析,聚类分析,毕业设计有用,在MATLAB中求图像纹理特征,用于时频分析算法。- Constituting the modulated signals of different frequencies, Sampling a priori probability, calculate the weight, Code, there are very complete notes and
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一个求demon谱图的程序,对已知的采样信号找出其demon谱,从而找到里面的频率信息,已经封装为EXE程序,源代码是用MATLAB写的-A program for demon spectra to known sampling signals to find the demon spectrum, frequency of inside information, has been encapsulated in the EXE program, source code is written i
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