一种用于高保真波束和零点形成阵列的自校准SDR
A Self-Calibrating SDR for High Fidelity Beam- and Null-forming Arrays
AI总结：
本文提出了一种自校准SDR架构，用于实现高保真零点形成，通过紧凑的参考发射机定向耦合到天线馈源，通过仿真和实验验证了其有效性，适用于3.0-3.5GHz频段的频谱共享应用。
摘要：
零点形成在现代无线系统中日益重要，用于频谱共享、抗干扰和隐蔽通信，特别是在对抗性和拥挤环境中。然而，实现深度零点比传统波束成形更具挑战性：零点本质上狭窄，甚至微小的相位、定时或增益失配也会显著降低抑制性能。本文开发并验证了一种自校准SDR架构，专门用于高保真零点形成，利用紧凑的参考发射机定向耦合到天线馈源。通过在3.0至3.5GHz的SDR平台上进行仿真和实验测量，证明了该方法的有效性。该频段对国防频谱共享计划日益重要。
英文摘要：
Null forming is increasingly essential in modern wireless systems for spectrum-sharing, anti-jamming, and covert communications in contested and congested environments. Achieving deep nulls, however, is far more demanding than conventional beam steering: nulls are intrinsically narrow, and even small phase, timing, or gain mismatches across RF chains can significantly degrade suppression. This work develops and validates a self-calibrating SDR architecture tailored for high-fidelity null forming using a compact reference transmitter directionally coupled to the antenna feeds. We demonstrate the effectiveness of the approach through simulation and experimental measurements on an SDR platform operating from 3.0 to 3.5GHz, a band of growing importance for Department of Defense spectrum-sharing initiatives.
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