	US 12,276,718 B1
	Method for detecting and tracking low-observable target with boost-to-glide trajectory under condition of ambiguous slant range
Xiangyu Zhang, Yantai (CN); Hongsen Xie, Yantai (CN); Guochen Ding, Yantai (CN); Jie Yu, Yantai (CN); Changwen Zhan, Yantai (CN); and Fengyuan Liu, Yantai (CN)
Assigned to Naval Aeronautical University, Yantai (CN)
Filed by Naval Aeronautical University, Yantai (CN)
Filed on Nov. 26, 2024, as Appl. No. 18/961,230.
Application 18/961,230 is a continuation of application No. PCT/CN2024/072751, filed on Jan. 17, 2024.
Claims priority of application No. 202311266320.7 (CN), filed on Sep. 27, 2023.
Int. Cl. G01S 13/58 (2006.01); G01S 7/41 (2006.01)

CPC G01S 13/58 (2013.01) [G01S 7/418 (2013.01)]

10 Claims

1. A method for detecting and tracking a low-observable target with a boost-to-glide trajectory under a condition of slant range ambiguity, wherein the method comprises:

S1: configuring an alternating pulse repetition frequency model for radar ranging:

S1.1: measuring an ambiguous slant range of the target by alternately transforming a pulse repetition frequency; and

S1.2: restoring a true range of the target;

S2: defining an extended non-coherent accumulation model in a distance-time plane for target detection:

S2.1: defining the extended non-coherent accumulation model;

S2.2: selecting the distance-time plane;

S2.3: extending a non-coherent accumulation detection mode based on distance-time Hough transform; and

S2.4: detecting the low-observable target; and

S3: configuring an S-type recursive energy tracking model for target tracking:

S3.1: configuring an S-type motion model; and

S3.2: designing a recursive energy filter, conducting update by recursive energy to keep target tracking at a high signal-to-noise ratio, and obtaining a target trajectory by using a filter algorithm.