System and method of radar location
First Claim
1. A system for radar location comprising:
- radar signal emission means, configured to emit a radar signal comprising at least one emitted pulse, an emitted pulse having a duration T1 and an associated index i and starting at an instant T2(i), said pulse being modulated by at least one code preserving good autocorrelation properties when a fraction of the said code is used;
means for receiving reflected radar signals;
means for determining a correlation between a reconstruction of the at least one emitted pulse and the radar signal received during a time interval starting at T2(i)+2*T1 and finishing at T2(i+1);
said means for determining the correlation being further adapted for;
reconstructing a set, of at least one truncated pulse j, a truncated pulse j being of duration T3(j), smaller than the duration of the emitted pulse T1 and corresponding to a final part of the said emitted pulse, said truncated pulses being of increasing respective durations,determining at least one first correlated signal j by correlation of said truncated pulse j and of the reflected radar signal received during the time interval starting at T2(i)+T1 and finishing at T2(i)+T1+T3(j),determining a second signal, on the basis of all or part of the set of correlated signals j, by copying the time interval, of said correlated signals j, starting at T2(i)+T1+T3(j−
1) and finishing at T2(i)+T1+T3(j), onto the time interval, of said second signal, starting at T2(i)+T1+T3(j−
1) and finishing at T2(i)+T1+T3(j).
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method of radar location comprises radar signal emission means, an emitted pulse of duration T1 and index i starting at instant T2(i); means receiving reflected radar signals; means determining correlation between reconstruction of an emitted pulse and signal received during the time interval between T2(i)+2*T1 and T2(i+1). The means determining a correlation can reconstruct a set, of at least one truncated pulse j of duration T3(j), less than T1, corresponding to the final part of said emitted pulse, said truncated pulses having increasing respective durations, determining at least one first correlated signal j by correlation of said truncated pulse j and signal received during time interval between T2(i)+T1 and T2(i)+T1+T3(j) and determining a second signal, based on first correlated signals j, by copying the time interval, of said correlated signal j, between T2(i)+T1+T3(j) and T2(i)+T1+T3(j+1), onto the time interval, of said second signal, between T2(i)+T1+T3(j) and T2(i)+T1+T3(j+1).
-
Citations
8 Claims
-
1. A system for radar location comprising:
-
radar signal emission means, configured to emit a radar signal comprising at least one emitted pulse, an emitted pulse having a duration T1 and an associated index i and starting at an instant T2(i), said pulse being modulated by at least one code preserving good autocorrelation properties when a fraction of the said code is used; means for receiving reflected radar signals; means for determining a correlation between a reconstruction of the at least one emitted pulse and the radar signal received during a time interval starting at T2(i)+2*T1 and finishing at T2(i+1); said means for determining the correlation being further adapted for; reconstructing a set, of at least one truncated pulse j, a truncated pulse j being of duration T3(j), smaller than the duration of the emitted pulse T1 and corresponding to a final part of the said emitted pulse, said truncated pulses being of increasing respective durations, determining at least one first correlated signal j by correlation of said truncated pulse j and of the reflected radar signal received during the time interval starting at T2(i)+T1 and finishing at T2(i)+T1+T3(j), determining a second signal, on the basis of all or part of the set of correlated signals j, by copying the time interval, of said correlated signals j, starting at T2(i)+T1+T3(j−
1) and finishing at T2(i)+T1+T3(j), onto the time interval, of said second signal, starting at T2(i)+T1+T3(j−
1) and finishing at T2(i)+T1+T3(j). - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of radar location using a radar location system including a radar signal emission means and means for receiving reflected radar signals, said radar signal emission means are adapted for using a set of different frequencies for the emission of the said pulses of said radar signals and said reception means for receiving are adapted for receiving said pulses of said reflected radar signals on said different frequencies the method comprising the following steps:
-
detecting, using the means for receiving the reflected radar signals, a possible jamming source, in the case of non-detection of the jamming source, emitting, usinq the radar signal emission means, and receiving, using the means for receiving the reflected radar signals, a radar signal among the reflected radar signals for which the pulses forming part of one and the same group of successive pulses use an identical emission frequency, the emission frequency varying from one group to the next, and in the case of detection of the jamming source, emitting, using the radar signal emission means, and receiving, using the means for receiving the reflected radar signals, the radar signal using different frequencies for two successive pulses, the frequencies following a periodic or nonperiodic distribution law.
-
Specification