Apparatus and method for generating low level noise signals

Details Apparatus and method for generating low level noise signals Apparatus and method for generating low level noise signals

1990-07-16

1991-04-09

Tarcza, Thomas H.

Cryptography

Key management

Having particular key generator

36422421, 364717, H04L 900

Patent

active

050070860

ABSTRACT:
A method and apparatus for generating low level noise signals are provided. Two random numbers X.sub.1 and Y.sub.1 are first generated and bits 0-4 of the first random number X.sub.1 are extracted to produce a number X.sub.2. A number X.sub.3 is further computed by the formula: X.sub.3 =2.sup.-N (X.sub.2 .multidot.I), where N is a predetermined number and 1.ltoreq.I.gtoreq.2.sup.N -1. Bit 7 of the second random number Y.sub.1 is then extracted and combined as a sign bit with the computed number X.sub.3 to produce a sign-magnitude eight bit number W representing a sample of low level noise encoded in accordance with .mu.-law.

REFERENCES:
patent: 4545024 (1985-10-01), Maher
Brown, A.D.E.; "Generate Gaussian Noise with a DSP Chip", EDN Magazine, Jun. 23, 1988.

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