用于OFDM-ISAC中距离-多普勒旁瓣抑制的全息波束成形
Holographic Beamforming for Range-Doppler Sidelobe Suppression in OFDM-ISAC
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中文总结 AI 辅助
本文针对OFDM-ISAC系统的RD旁瓣抑制问题，联合设计数字馈precoder与可重构全息表面幅度，提出交替 successive convex approximation 方法，数值结果表明增大孔径比增加馈源更利于降低旁瓣电平。
中文摘要 AI 辅助
本文研究了可重构全息表面（RHS）辅助的集成感知与通信系统中的距离-多普勒（RD）旁瓣抑制问题。我们联合设计数字馈 precoder 与 RHS 幅度，在发射功率、目标照射及通信约束下最小化集成 RD 旁瓣电平。为此，我们开发了交替 successive convex approximation 方法，通过二次子问题更新两类变量。数值结果表明，增加馈源会产生收益递减，而增大孔径更有效，可通过 RHS 设计降低旁瓣电平。
英文摘要
This paper investigates range--Doppler (RD) sidelobe suppression in an integrated sensing and communications system with a reconfigurable holographic surface (RHS). We jointly design the digital feed precoders and RHS amplitudes to minimize the integrated RD sidelobe level subject to transmit-power, target-illumination, and communication constraints. For this, we develop an alternating successive convex approximation method updating both variable blocks through quadratic subproblems. Numerical results reveal diminishing returns from additional feeds, while increasing the aperture remains more effective and allows the RHS design to reduce sidelobe level.
