The PCM System Based On Matlab Simulation
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(Grade 20##Class ##Major of Communication Engineering,School of Physics and
Telecommunication Engineering of Shaanxi University of Technology,Hanzhong
723003,Shaanxi)
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Abstract: In digital communication transmission system,using pulse code
modulation,Hereinafter
Referred to as PCM.PCM is carried out on the analog signal digital signal sampling,quantization
and coding.Periodically scan,an analogue signal sampling,that is,the continuous time signal into a
discrete time signal.Quantitative,is after sampling the instantaneous value of the amplitude of
discrete,which USES a set of rules of level,the instantaneous sampling value of the most close to
the level of value.An analog signal after sampling quantization has quantitative pulse amplitude
modulation signal,it is only a finite number of values.Coding,which is expressed in a group of
binary code group each have a fixed level of quantitative values.
Key words: PCM,quantization,coding,The compression law ofµ
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