US 11,686,812 B2
Method for confusing the electronic signature transmitted by a radar, and transmission/reception device suitable for implementing same
Pascal Cornic, Brest (FR); Patrick Garrec, Merignac (FR); and Nicolas Porez, Merignac (FR)
Assigned to THALES, Courbevoie (FR)
Filed by THALES, Courbevoie (FR)
Filed on Dec. 4, 2019, as Appl. No. 16/703,810.
Claims priority of application No. 1872651 (FR), filed on Dec. 11, 2018.
Prior Publication US 2020/0182966 A1, Jun. 11, 2020
Int. Cl. G01S 7/38 (2006.01); G01S 7/02 (2006.01); G01S 7/36 (2006.01); G01S 13/00 (2006.01)
CPC G01S 7/38 (2013.01) [G01S 7/024 (2013.01); G01S 7/36 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for confusing the electronic signature of a signal transmitted by a radar, comprising the generation by the radar of a plurality of pulses, wherein the method comprises a step of modulation, in the pulse, of the polarization of the transmitted signal, according to two orthogonal or opposite polarizations, the modulation of the polarization being performed according to a predetermined modulation code, the modulation code being temporally inverted from one pulse to the next.
 
8. A transmission/reception device configured to implement the confusion method according to claim 1, and comprising:
a first reception channel suited to a first rectilinear polarization corresponding to a first polarization component (Ex) of the polarization of the transmitted signal; and
a second reception channel suited to a second rectilinear polarization corresponding to a second polarization component (Ey) of the polarization of the transmitted signal;
a correlator common to the first reception channel and to the second reception channel, and configured to perform a filtering suited to the modulation code.