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Pseudonoise with Arbitrary Amplitude Distribution¿Part II: Hardware Implementation
April 1972 (vol. 21 no. 4)
pp. 346-352
John S. Sobolewski, Departments of Electrical Engineering and Computer Science, and the Computing Center, Washington State University, Pullman, Wash. 99163.
W. H. Payne, Department of Computer Science and the Computing Center, Washington State University, Pullman, Wash. 99163.
A hardwired device that produces a voltage with arbitrary amplitude distribution was constructed using a ``conditional bit'' algorithm to sample from an arbitrary voltage amplitude distribution. The sampling algorithm and hardware processor are independent of the distribution sampled. Only a small read-only memory ROM needs to be changed to alter the distribution sampled. It is possible to compute the accuracy of the sampled random variables from knowledge of the read-only memory contents. The sampling accuracy of the device may be arbitrarily increased by varying any of several design parameters. Our particular pseudonoise generator produced 200 000 random seven-bit variables/s. Contents of read-only memories for both a Gaussian and an arbitrary density were computed so that the maximum error was less than 2.73 percent. Both the sampling speed and accuracy of a conditional bit pseudonoise generator can be increased much in excess of our implementation.
Citation:
John S. Sobolewski, W. H. Payne, "Pseudonoise with Arbitrary Amplitude Distribution¿Part II: Hardware Implementation," IEEE Transactions on Computers, vol. 21, no. 4, pp. 346-352, April 1972, doi:10.1109/TC.1972.5008974
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