Method for the processing of a digitally encoded pulse signal

Details Method for the processing of a digitally encoded pulse signal Method for the processing of a digitally encoded pulse signal

1991-12-19

1993-02-23

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

Determining distance

With frequency modulation

342145, 342189, 342378, G01S 7285, G01S 1328

Patent

active

051894289

ABSTRACT:
Disclosed is a method for the processing of a signal received directly or indirectly from a transmitter, sending out pulses that are digitally encoded according to a transmission code of N instants; said processing comprising notably an operation of filtering that is matched with the transmitted signal and an operation of detection by the comparison of the post-filtering level of the signal with a so-called detection threshold; wherein the signal received is subjected to two processing operations A and B, the processing operation A comprising a self-correlation and the processing operation B comprising an intercorrelation with a mismatched code having a length at least equal to 3N, the function of intercorrelation of this mismatched code with the transmission code giving a major central lobe and at least N side lobes that are zero on either side of this major lobe; and wherein it is decided that there is a detection relating to one of the instants of the correlation or of the intercorrelation only if the levels of the functions of self-correlation and intercorrelation of this very same instant are higher than the detection threshold.

REFERENCES:
patent: 4153900 (1979-05-01), Novak et al.
patent: 4259650 (1981-03-01), Donahue
patent: 4910719 (1990-03-01), Thubert
patent: 5047780 (1991-09-01), Dijkstra
Colloque Int'l Sur Le Radar, Paris, Dec. 4-8, 1978 pp. 60-67.
IEEE 1990 Int'l Radar Conference, Arlington, Va. May 7-10, 1990 pp. 249-252.

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