METHOD OF DETECTING NON-COHERENT SIGNAL PACKETS WITH CONSTANT FALSE ALARM LEVEL Russian patent published in 2010 - IPC G01S7/36 

Abstract RU 2391681 C1

FIELD: physics.

SUBSTANCE: in the method of detecting non-coherent signal packets with constant false alarm level, in which in each of N repetition periods the non-coherent packets the following is carried out: a window is created from Nw range elements lying symmetrically relative the inspected k-th range element, where interference power in the inspected range element is evaluated from the average value of squares of the envelope curve of interference in the window from Nw range elements, the square of the envelope curve is normalised in the inspected range element to interference power evaluation After that normalisation results are averaged in N repetition periods of the non-coherent packet. Availability of a non-coherent signal packet in the inspected range element is indicated by the averaged normalisation result overshooting the threshold level C. The following is carried out: from results of normalizing zk,n in N repetition periods of the non-coherent packet, an ordered sample is formed, elements of this sample with rank r from N-Ns+1 to N, where Ns<N, weighted with a fixed coefficient d, defined by permissible loss value of detecting a non-coherent signal packet in the presence of noise, are compared with an element of an ordered sample with rank N-Ns, that way checking fulfillment of the condition for r=N,…N-N2+1. If the given condition is met, a signal which is not synchronous with the repetition period is detected in the i-th repetition period of the non-coherent packet, where i is found from the expression The normalising result zk,i related to presence of the said signal which is not synchronous with the repetition period is excluded from the averaged normalizing results. The number of times m, where 0≤m<Ns, when the said condition is met is calculated. The threshold level C is varied depending on the number m so as to ensure the given probability value of false alarm.

EFFECT: lower level of false alarm.

2 dwg

Similar patents RU2391681C1

Title Year Author Number
METHOD OF DETECTING SIGNALS WITH CONSTANT FALSE ALARM LEVEL (VERSIONS) 2008
  • Lozovskij Igor' Filippovich
RU2392637C1
METHOD OF MEASURING INTERPERIOD FACTOR OF PASSIVE INTERFERENCE CORRELATION 2009
  • Lozovskij Igor' Filippovich
RU2419809C1
METHOD OF DETECTING SIGNALS WITH CONSTANT FALSE ALARM LEVEL 2009
  • Lozovskij Igor' Filippovich
RU2411535C2
METHOD FOR SPECTRAL-CORRELATION DETECTION OF AIRCRAFT BY QUASI-CONTINUOUS PULSE SIGNALS OF ON-BOARD AVIONIC SYSTEMS 2021
  • Balandin Ivan Aleksandrovich
  • Kuznetsov Kirill Evgenevich
  • Lavrentev Aleksandr Mikhailovich
  • Kirichenko Aleksandr Andreevich
RU2768370C1
INTERFERENCE SUPPRESSION METHOD 2009
  • Lozovskij Igor' Filippovich
RU2413238C1
METHOD OF MULTIPLE-RUNDOWN SIGNAL ACCUMULATION IN RADAR STATION WHEN DETECTING AERIAL TARGETS IN PULSE-DOPPLER MODE 2019
  • Kolbasko Ivan Vasilevich
RU2730182C1
METHOD FOR INCOHERENT EXTREME ACCUMULATION-DETECTION OF A SIGNAL IN PULSE-DOPPLER RADAR 2019
  • Kolbasko Ivan Vasilevich
RU2694809C1
METHOD OF MOVING TARGET DETECTING WITH SPEED AND MANEUVERABILITY PARAMETERS DISTINCTION 2015
  • Shatalov Aleksandr Andreevich
  • Yastrebkov Aleksandr Borisovich
  • Samotonin Dmitrij Nikolaevich
  • Zaborovskij Igor Stanislavovich
  • Shatalova Valentina Aleksandrovna
RU2619056C2
METHOD FOR POSTDETECTOR PROCESSING OF VOBULATED RADIO PULSE BURST AND DEVICE FOR ITS REALIZATION 2002
  • Dyranov Ju.V.
  • Kostrov V.V.
  • Antuf'Ev R.V.
  • Kostrova T.G.
RU2237259C2
METHOD OF SUPPRESSING NOISE 2009
  • Lozovskij Igor' Filippovich
RU2420754C2

RU 2 391 681 C1

Authors

Lozovskij Igor' Filippovich

Dates

2010-06-10Published

2008-12-02Filed