关键词: 干扰抑制, 自适应波束成形, 模拟数字转换器, 模拟数字混合

Abstract: The anti-jamming capacity of traditional digital beamforming system is limited by the quantization accuracy of the analog-to-digital converter (ADC). To address this situation, we propose a novel hybrid analog-digital adaptive beamforming method. The interference is suppressed preliminarily by introducing the analog beamforming at the RF channel, which prevents sampling saturation. Subsequently, the interference is suppressed with the digital beamforming technology. We carried out a theoretical derivation of the proposed analog-digital hybrid method, and analyzed its anti-interference performance. The simulation results demonstrate that the proposed method can effectively reduce the impact of quantization accuracy and achieve excellent performance for different interference intensity. Compared with traditional digital beamforming method, the superiority of the proposed method for blanket jamming suppression is also demonstrated.

Key words: jamming suppression, adaptive beamforming, ADC, hybrid analog-digital