Dujuan Hu, Li Yang, Xiujun Zhang, Yan Xue, Xizhang Wei, Tairan Lin
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引用次数: 0
摘要
本文从理论上全面推导了同步发射和接收（STAR）阵列中基带数字消除、孔径级数字消除和波束成形空间消除模型的残余噪声功率和有效各向同性隔离（EII）信号模型。我们模拟并分析了在 32 元平面阵列中使用数字 SI 消除（SIC）和波束成形的 STAR 系统的隔离性能和自干扰（SI）噪声消除。仿真结果表明，在没有 SIC 或基带数字 SIC 的情况下，接收自适应波束成形（ABF）获得的 EII 比发射 ABF 获得的 EII 高 20 dB。在孔径级数字 SIC 的基础上，发射 ABF 和接收 ABF 获得的 EII 基本相同。基带数字 SIC 获得的 EII 分别比发射 ABF 和接收 ABF 低 22.5 dB 和 41.1 dB。因此，使用发射 ABF 和接收 ABF 时不需要基带数字 SIC 技术。
Comparative Analysis of Digital Self-Interference Cancellation Methods for Simultaneous Transmit and Receive Arrays
This paper provides a comprehensive theoretical derivation of the residual noise power and effective isotropic isolation (EII) signal models in baseband digital cancellation, aperture-level digital cancellation, and beamforming spatial cancellation models in simultaneous transmit and receive (STAR) arrays. We simulated and analyzed the isolation performance and self-interference (SI) noise cancellation of STAR systems using digital SI cancellation (SIC) and beamforming in a 32-element planar array. The simulation results show that in the absence of SIC or baseband digital SIC, the EII obtained by receive adaptive beamforming (ABF) is 20 dB higher than that obtained by transmit ABF. On the basis of aperture-level digital SIC, the EII obtained from transmit ABF and receive ABF is basically the same. The EII obtained by baseband digital SIC is 22.5 dB and 41.1 dB lower than that of transmit ABF and receive ABF, respectively. Therefore, baseband digital SIC technology is not required when using transmit ABF and receive ABF.
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