Power-Efficient Analog Front-End Interference Suppression With Binary Antennas
Power-Efficient Analog Front-End Interference Suppression With Binary Antennas
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DOI：
10.1109/twc.2022.3212937
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发表时间：
2023-04
影响因子：
10.4
通讯作者：
Sajjad Nassirpour;Agrim Gupta;Alireza Vahid;Dinesh Bharadia
中科院分区：
文献类型：
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作者：
Sajjad Nassirpour;Agrim Gupta;Alireza Vahid;Dinesh Bharadia
数字和模拟波束形成是众所周知的使用多天线结构抑制干扰的方法，但它们具有实际局限性：(i)数字波束形成需要多个模数转换器（adc）来实现数字转换，这增加了成本和复杂性；（ii）虽然模拟波束成形不需要昂贵的adc，但它使用移相器，这会导致量化误差、插入损耗和功率效率降低。在本文中，我们考虑了$K$用户上行干扰信道，并提出了一种低复杂度的算法干扰抑制方案，该方案依赖于接收器上基于简单开关的可重构天线。我们利用开关来启用/禁用天线，以最大化每个用户的信噪比（SINR）。我们提出了一种逼近最优解的优化方法。为了评估结果，我们将我们的方法与相关基准进行了比较。此外，我们推导了每个接收机最小天线单元数的下界，以达到所需的信噪比，并通过仿真验证了研究结果。
Digital and analog beamforming are well-known methods to suppress interference using multiple-antenna structures, but they have practical limitations: (i) Digital beamforming requires multiple analog-to-digital converters (ADCs) to enable digital conversion, which increases the cost and complexity; (ii) Although analog beamforming does not require expensive ADCs, it uses phase shifters, which cause quantization errors, insertion losses, and reduced power efficiency. In this paper, we consider a $K$ -user uplink interference channel and propose a low-complexity algorithmic interference-suppression solution relying on simple switch-based reconfigurable antennas at the receivers. We utilize switches to enable/disable antennas to maximize each user’s signal-to-interference-plus-noise ratio (SINR). We present an optimization approach to approximate the optimal solution. To evaluate the results, we compare our method with relevant benchmarks. Moreover, we derive a lower bound on the minimum number of antenna elements per receiver to attain the desired SINR and verify the findings via simulations.