Affiliation:
1. School of Air Defense and Missile Defense, Air Force Engineering University, Xi’an 710051, China
2. College of Information and Communication, National University of Defense Technology, Wuhan 430010, China
Abstract
This paper proposes two data-independent phase-only beamforming algorithms for frequency diverse array multiple-input multiple-output radar against swarm interference. The proposed strategy can form a deep null at the interference area to achieve swarm interference suppression by tuning the phase of the weight vector, which can effectively reduce the hardware cost of the receiver. Specifically, the first algorithm imposes constant modulus constraint and sidelobe level constraint, and the phase-only weight vector is solved. The second algorithm performs a constant modulus decomposition of the weight vector to obtain two phase-only weight vectors, and uses two parallel phase shifters to synthesize one beamforming weight. Both methods can obtain the phase-only weight to realize suppression for swarm interference. Simulation results demonstrate that our strategy shows superiority in beam shape, output signal-to-interference-noise ratio, and phase shifter quantization performance, and has the potential for use in many applications, such as radar countermeasures and electronic defense.
Funder
National Nature Science Foundation of China
Natural Science Foundation of Shaanxi Province
Subject
General Earth and Planetary Sciences
Cited by
2 articles.
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