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首页> 外文会议>IEEE International symposium on Personal, Indoor, and Mobile Radio Communications >Robust beamforming method for SDMA with interleaved subarray hybrid beamforming
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Robust beamforming method for SDMA with interleaved subarray hybrid beamforming

机译：具有交错子阵列混合波束形成的SDMA鲁棒波束形成方法

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This paper considers millimeter-wave access network systems with space division multiple access using an interleaved subarray hybrid beamforming structure, where antenna elements in each subarray scatter uniformly over the whole antenna array. The structure can provide high system capacity by multiplexing users in the space domain with narrow beams. However, imperfect user direction estimation might cause system capacity degradation due to interference between the beams. In particular, severe interference is experienced in the interleaved subarray configuration because many grating lobes are observed due to the wide element spacing in each subarray. Therefore, we propose a robust beamforming method in order to provide high system capacity even if user direction estimation is inaccurate. In the proposed method, multiple subarrays form beams to a common direction when the peaks of beams directed to the respective user directions are overlapped. We conduct computer simulations to evaluate the proposed method with a non-ideal beam search. The simulation results demonstrate that the proposed method can improve system capacity in the SDMA systems with the interleaved subarray hybrid beamforming structure.
机译：本文考虑了使用交错子阵列混合波束成形结构的空分多址毫米波接入网络系统，其中每个子阵列中的天线元件在整个天线阵列上均匀地散射。通过在空间域中用窄波束复用用户，该结构可以提供高系统容量。但是，不完善的用户方向估计可能会由于波束之间的干扰而导致系统容量下降。特别是，在交错的子阵列配置中会遇到严重的干扰，因为由于每个子阵列中较宽的元素间距而观察到许多光栅波瓣。因此，我们提出了一种鲁棒的波束成形方法，以便即使用户方向估计不准确也能提供高系统容量。在所提出的方法中，当指向各个用户方向的光束的峰值重叠时，多个子阵列形成朝着公共方向的光束。我们进行计算机仿真，以通过非理想的光束搜索来评估所提出的方法。仿真结果表明，所提出的方法可以提高具有交错子阵列混合波束形成结构的SDMA系统的系统容量。

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