Communications: directive radio wave systems and devices (e.g. – With particular circuit – Digital processing
Patent
1994-11-02
1996-03-19
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Digital processing
342159, 342162, G01S 7292
Patent
active
055006477
ABSTRACT:
Disclosed is a method for determining the rank of ambiguity in terms of distance of radar echoes. In a sequence comprising a given number N of recurrences, the method consists, in a first step, in making a retrograde prediction of an echo for the P first recurrences on the basis of the echoes received in the Q last recurrences, in a second step in comparing the echoes actually received in the P first recurrences with the predicted echo and in a third step in determining the rank of ambiguity in distance as a function of the result of the comparison, the rank of ambiguity of an echo being the integer immediately greater than the highest rank of the first recurrences where the difference between the predicted echo and the actually received echo exceeds a threshold that is at least equal to the prediction noise multiplied by a factor of adjustment K. The sum of the numbers P and Q is smaller than or equal to the number N, and is preferably equal to this number N. Application to surveillance or tracking radar. FIG. 3.
REFERENCES:
patent: 4602258 (1986-07-01), Sarfati
patent: 4972194 (1990-11-01), Carrara et al.
patent: 5289192 (1994-02-01), Feedman et al.
patent: 5302955 (1994-04-01), Schutte et al.
patent: 5311189 (1994-05-01), Nagel
patent: 5341142 (1994-08-01), Reis et al.
"Thomson-CSF"
Sotomayor John B.
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