期刊名称：IAENG International Journal of Computer Science
印刷版ISSN：1819-656X
电子版ISSN：1819-9224
出版年度：2021
卷号：48
期号：4
语种：English
出版社：IAENG - International Association of Engineers
摘要：The universal digital simulator of a random signal with the required three-dimensional probability distribution of its discrete values is introduced. The simulation algorithm is based on a double chain Markov model of the signal samples. Thus, at the simulator output, a sequence of binary codes of the samples with the required probabilistic and correlation properties of the three adjacent random or pseudo-random values is generated. A technique for determining the parameters of the double chain Markov model is considered. It is based either on the specified threedimensional probability density or on the experimental sampling of a simulated random process. The block diagram for the hardware implementation of the simulator is proposed. It is built using microprocessors or field-programmable gate arrays that can provide a high sampling rate. It is shown that the computational procedure is simple and that it can be implemented using rather inexpensive typical components. The replacement of the model of the simulated random signals is carried out by either reloading the memory device by the pre-generated data array or by switching to memory pages where the necessary arrays are stored. The properties of the simulator including its probabilistic and correlation characteristics are studied. It is established that a high accuracy of coincidence between the theoretical threedimensional probability distribution of the simulated model and the histogram built on the sequence of generated random signal samples is provided. It is also pointed out that the proposed simulator can be used in research, development and testing of electronic equipment of various purposes, including different measurers and radio path simulators.
关键词：Random signal simulator;three-dimensional probability distribution;discrete values;Markov model
