Small Signal Anti-Jamming Scheme Based on a DMA Linear Array under Strong Jamming

Considering the difficulty of receiving small signals under strong electromagnetic jamming, this paper proposes a small-signal anti-jamming scheme based on single dynamic metamaterial antenna (DMA). Our uses dynamic-adjustable characteristics DMA to perform spatial filtering at radio frequency (RF) front-end, suppress jamming in advance and improve receiver’s ability receive demodulate signals. Specifically, we take maximization signal-to-interference-plus-noise ratio (SINR) as optimization goal, transform fractional non-convex objective function model into quasi-convex semi-definite relaxation (SDR) problem, use Charnes-Cooper (CC) algorithm find optimal array-element codeword-state matrix. Simulation results show that has better spatial-beamforming capability than traditional arrays, proposed can resist jamming. realizes effect digital beamforming back end communication system, advantages digital-spatial filtering, further improves