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Time-invariant joint transmit and receive beampattern optimization for polarization-subarray based frequency-diverse-array radar

Time-invariant joint transmit and receive beampattern optimization for polarization-subarray based frequency-diverse-array radar
Time-invariant joint transmit and receive beampattern optimization for polarization-subarray based frequency-diverse-array radar

We propose a polarization-subarray based frequency diverse array (FDA) radar with the subarray-based FDA as transmit (Tx) array and the polarization-sensitive subarray-based FDA (PSFDA) as the receive (Rx) array. The subarray-based FDA has the capability to achieve a single maximum beampattern at the target location, while the PSFDA can provide an extra degree of freedom to further suppress the interference and thus to improve the radar's signal-to-interference-plus-noise ratio (SINR). The time-dependent frequency offsets are designed for the proposed radar to realize the time-invariant beampattern at the desired target location over the whole pulse duration. To further improve the target detection performance, the time-invariant joint Tx-Rx beampattern design is considered based on the output SINR maximization. To effectively solve the nonconvex output SINR maximization problem, a suboptimal alternating optimization algorithm is proposed to iteratively optimize the FDA Tx beamforming, the PSFDA spatial pointings and the PSFDA Rx beamforming. Numerical experiments illustrate that the time-invariant and single-maximum joint Tx-Rx beampattern at the target location is achieved. Moreover, compared to the basic FDA and logarithmic frequency offset FDA as well as conventional phased array radars, the proposed polarization-subarray based FDA radar achieves a significant SINR improvement, particularly when the desired target and the interferences are spatially indistinguishable.

joint transmit-receive beampattern design, output SINR maximization, Polarization-subarray based FDA radar, time-invariant beampattern
1053-587X
1-16
Gong, Shiqi
28581532-77f4-4d05-9bad-1d20682a2730
Wang, Shuai
345081fb-5209-4dcc-90e3-0ed64b5fa1c3
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Xing, Chengwen
2477f24d-3711-47b1-b6b4-80e2672a48d1
Wei, Xing
f84a35cd-db8e-4aa1-9aac-283c5ba36ebb
Gong, Shiqi
28581532-77f4-4d05-9bad-1d20682a2730
Wang, Shuai
345081fb-5209-4dcc-90e3-0ed64b5fa1c3
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Xing, Chengwen
2477f24d-3711-47b1-b6b4-80e2672a48d1
Wei, Xing
f84a35cd-db8e-4aa1-9aac-283c5ba36ebb

Gong, Shiqi, Wang, Shuai, Chen, Sheng, Xing, Chengwen and Wei, Xing (2018) Time-invariant joint transmit and receive beampattern optimization for polarization-subarray based frequency-diverse-array radar. IEEE Transactions on Signal Processing, 1-16. (doi:10.1109/TSP.2018.2868041).

Record type: Article

Abstract

We propose a polarization-subarray based frequency diverse array (FDA) radar with the subarray-based FDA as transmit (Tx) array and the polarization-sensitive subarray-based FDA (PSFDA) as the receive (Rx) array. The subarray-based FDA has the capability to achieve a single maximum beampattern at the target location, while the PSFDA can provide an extra degree of freedom to further suppress the interference and thus to improve the radar's signal-to-interference-plus-noise ratio (SINR). The time-dependent frequency offsets are designed for the proposed radar to realize the time-invariant beampattern at the desired target location over the whole pulse duration. To further improve the target detection performance, the time-invariant joint Tx-Rx beampattern design is considered based on the output SINR maximization. To effectively solve the nonconvex output SINR maximization problem, a suboptimal alternating optimization algorithm is proposed to iteratively optimize the FDA Tx beamforming, the PSFDA spatial pointings and the PSFDA Rx beamforming. Numerical experiments illustrate that the time-invariant and single-maximum joint Tx-Rx beampattern at the target location is achieved. Moreover, compared to the basic FDA and logarithmic frequency offset FDA as well as conventional phased array radars, the proposed polarization-subarray based FDA radar achieves a significant SINR improvement, particularly when the desired target and the interferences are spatially indistinguishable.

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More information

Accepted/In Press date: 21 August 2018
e-pub ahead of print date: 6 September 2018
Keywords: joint transmit-receive beampattern design, output SINR maximization, Polarization-subarray based FDA radar, time-invariant beampattern

Identifiers

Local EPrints ID: 426916
URI: http://eprints.soton.ac.uk/id/eprint/426916
ISSN: 1053-587X
PURE UUID: e4860c6f-d35c-4d0e-8dcd-3cca6d01bc39

Catalogue record

Date deposited: 14 Dec 2018 17:30
Last modified: 06 Oct 2020 19:08

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Contributors

Author: Shiqi Gong
Author: Shuai Wang
Author: Sheng Chen
Author: Chengwen Xing
Author: Xing Wei

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