Method of detecting and processing pulsed signals in a radio signal

Patent 7336736 Issued on February 26, 2008. Estimated Expiration Date:

November 26, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

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Inventors

Assignee

Thales

Application

No. 10250758 filed on 11/26/2002

US Classes:

375/342, Locating predetermined portion of pulse375/237, PULSE NUMBER MODULATION375/238, PULSE WIDTH MODULATION375/147, Receiver375/340, Particular pulse demodulator or detector375/316, RECEIVERS375/348, Intersymbol interference375/353, PULSE AMPLITUDE MODULATION375/239, PULSE POSITION, FREQUENCY, OR SPACING MODULATION342/20, Detection of surveilance329/311, PULSE OR INTERRUPTED CONTINUOUS WAVE DEMODULATOR329/312, Pulse width demodulator329/313, Pulse position, frequency, phase or spacing demodulator342/379, Side lobe elimination455/306Filter in at least one path

Examiners

Primary: Fan, Chieh M.
Assistant: Fotakis, Aristocratis

Attorney, Agent or Firm

Lowe, Hauptman, Ham & Berner, LLP

Foreign Patent References

0 583 967 EP 02/01/1994

International Class

G01R 23/14

Abstract

The invention allows the detection and processing in a radio signal received by a receiver, of any signal of “pulsed” type present in radio signals applied to the input of a radiofrequency receiver, the receiver having an analogue/digital converter for performing the coding into digital on N bits of P successive samples of the analogue signal applied to the input of the receiver and a computer for processing the said digital signals, characterized in that on the basis of a histogram of the rate of occupancy of the digitized samples, graded in ranges Fx of amplitude-increasing sample levels, is determined, from among the ranges Fx, a range Fn onwards of which the total number of digitized samples Nnor contained in the ranges Fn and those below Fn is greater than or equal to a normality threshold Nn, Nn being a number predetermined as a function of the sensitivity of the detection of pulsed signals that one wishes to achieve.

Other References

Abimoussa et al; “Anti-Jamming Solution to Narrowband CDMA Interference Problem”; 2000 Canadian Conference on Electrical and Computing Engineering. Conference Proceeding. Navigation to New Era (Cat. No. 00^TH8492); pp. 1057-1062, vol. 2, XP002214232.