COMPUTER SIMULATION ON NOISE PROCESSES

来源 :Chinese Journal of Acoustics | 被引量 : 0次 | 上传用户:yjj_2323
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A method for generating a pseudo-random sequence with both a specified amplitude probabilitydistribution and a desired spectral property is described in this paper.This method is suitable forbeing used on a general-purpose digital computer.A pseudo-random sequence with perfectly satis-factory power spectrum is obtained by FFT first and is used as a reference sequence.Then a fun-damental sequence with a specified amplitude distribution is constructed to have the same spectralproperty as that of the reference one by the correlation transfer method(CT).The relationshipbetween the performance of the FFT-CT method and the sample number of a sequence is studied inthe paper.Some examples of simulating noise processes which have certain amplitude distributionsand desired spectral properties are given. A method for generating a pseudo-random sequence with both a specified amplitude probability distribution and a desired spectral property is described in this paper. This method is suitable for being used on a general-purpose digital computer. A pseudo-random sequence with perfectly satis-factory power spectrum is obtained by FFT first and is used as a reference sequence.Then a fun-damental sequence with a specified amplitude distribution is constructed to have the same spectralproperty as that of the reference one by the correlation transfer method (CT) .The relationshipbetween the performance of the FFT-CT method and the sample number of a sequence is studied inthe paper. Examples of simulating noise processes which have certain amplitude distributions and desired spectral properties are given.
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