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System for detecting the presence of a pure signal in a discrete noisy signal measured at a constant average noise level with a probability of false detection below a predetermined false detection level

  • US 4,782,456 A
  • Filed: 04/23/1986
  • Issued: 11/01/1988
  • Est. Priority Date: 04/23/1985
  • Status: Expired due to Fees
First Claim
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1. A system for detecting the presence of a pure signal in a discrete noisy signal measured at a constant average noise level, comprising:

  • in series a converter for converting radiation received thereby into electrical pulses, a shaping means, a binary counting scale, a processing means, and a signalling means;

    said processing means comprising a processor, at least one memory, and an input-output circuit, said processor comprising means for measuring a counting rate N during successive equal time periods, means for estimating a value of an average noise level M, means for calculating a false detection probability PF as a function of said counting rate N and of the estimated average noise level M, and means for comparing said false detection probability PF with a predetermined false detection level TF, to thereby ascertain that a pure signal has been detected when said false detection probability PF is below said false detection level.

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