公开(公告)号：US20220091249A1

公开(公告)日：2022-03-24

申请号：US17479641

申请日：2021-09-20

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Ramachandran S. Raghavan

IPC: G01S13/524 ,  G01S7/02 ,  G01S7/292

Abstract: A radar system provides a transmitter that transmits a sequence of transmitted pulses in a transmit beam, receiving antenna array comprised of more than one element, and a receiver communicatively coupled to the receiving antenna area to receive received signal that comprises in-phase and quadrature samples collected of a reflected version of the sequence of transmitted pulses. A signal processing and target detection module resolves a received signal-plus-interference into different range cells based on a time delay between the transmitted pulse and the received signal, wherein a response from a range cell to a transmitted pulse is due to a target within the transmit beam and moving at an unknown velocity. An interference suppression module suppresses interference and test for presence of a target tested at each of a set of hypothesized azimuth angles and Doppler frequencies.

公开(公告)号：US11747434B2

公开(公告)日：2023-09-05

申请号：US17211253

申请日：2021-03-24

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Ramachandran S. Raghavan

IPC: G01S7/02 ,  G01S13/524 ,  G01S7/41

CPC classification number: G01S7/023 ,  G01S7/414 ,  G01S13/5246

Abstract: Detection of a radar target from a received radar signal includes computing a vector of filter weights dependent upon a steering vector and determining a threshold value dependent upon a designated probability of false alarm. The vector of filter weights is applied to samples of the received radar signal at a test cell, corresponding to a test range, to provide a filtered test signal and a test power of the filtered test signal is computed. The weights are also applied to samples of the received radar signal at a number of reference cells, to produce filtered reference signals. A reference power is computed from the filtered reference signals and the radar target is detected at the test range when a ratio of the test power to the reference power exceeds the threshold value.

公开(公告)号：US20210208270A1

公开(公告)日：2021-07-08

申请号：US17211253

申请日：2021-03-24

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Ramachandran S. Raghavan

IPC: G01S13/524

Abstract: Detection of a radar target from a received radar signal includes computing a vector of filter weights dependent upon a steering vector and determining a threshold value dependent upon a designated probability of false alarm. The vector of filter weights is applied to samples of the received radar signal at a test cell, corresponding to a test range, to provide a filtered test signal and a test power of the filtered test signal is computed. The weights are also applied to samples of the received radar signal at a number of reference cells, to produce filtered reference signals. A reference power is computed from the filtered reference signals and the radar target is detected at the test range when a ratio of the test power to the reference power exceeds the threshold value.