US 12,436,269 B2
Radar imaging method, and radar using such a method
Pascal Cornic, Brest (FR); Renan Le Gall, Brest (FR); and Yves Audic, Brest (FR)
Assigned to THALES, Courbevoie (FR)
Appl. No. 17/920,718
Filed by THALES, Courbevoie (FR)
PCT Filed Apr. 16, 2021, PCT No. PCT/EP2021/059875
§ 371(c)(1), (2) Date Oct. 21, 2022,
PCT Pub. No. WO2021/219398, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 2004262 (FR), filed on Apr. 29, 2020.
Prior Publication US 2023/0194698 A1, Jun. 22, 2023
Int. Cl. G01S 13/89 (2006.01); G01S 7/35 (2006.01); G01S 13/58 (2006.01)
CPC G01S 13/89 (2013.01) [G01S 7/354 (2013.01); G01S 7/356 (2021.05); G01S 13/584 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An imaging method using a doppler radar using an active antenna comprising N transmission channels and M reception channels, said antenna covering an angular domain of given solid angle during a detection time interval of duration T, said time unit corresponding to a detection block wherein the N transmission channels are focused successively in pointing directions (dei) taken from a set of De pointing directions, wherein
the pointing direction on transmission (dei) is modified from recurrence to recurrence;
each detection block of duration T comprises a periodic repetition of a number C of pointing cycles on transmission, each of these cycles comprising a number P of recurrences, the set of these P recurrences covering the De pointing directions (dei) of said set;
the order of the pointings is modified in a pseudo-random manner from pointing cycle to pointing cycle during a same detection block on transmission so as to create an irregular time interval between two pointings in a same direction;
at least one beam is formed in reception on each recurrence in a direction included in said focused angular domain in transmission in the pointing direction corresponding to said recurrence.