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arXiv · 1904.08614

Multi-stage Antenna Selection for Adaptive Beamforming in MIMO Arrays

Hamed Nosrati·Elias Aboutanios·David Smith
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Abstract

Increasing the number of transmit and receive elements in multiple-input-multiple-output (MIMO) antenna arrays imposes a substantial increase in hardware and computational costs. We mitigate this problem by employing a reconfigurable MIMO array where large transmit and receive arrays are multiplexed in a smaller set of k baseband signals. We consider four stages for the MIMO array configuration and propose four different selection strategies to offer dimensionality reduction in post-processing and achieve hardware cost reduction in digital signal processing (DSP) and radio-frequency (RF) stages. We define the problem as a determinant maximization and develop a unified formulation to decouple the joint problem and select antennas/elements in various stages in one integrated problem. We then analyze the performance of the proposed selection approaches and prove that, in terms of the output SINR, a joint transmit-receive selection method performs best followed by matched-filter, hybrid and factored selection methods. The theoretical results are validated numerically, demonstrating that all methods allow an excellent trade-off between performance and cost.

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Hamed Nosrati, Elias Aboutanios, David Smith. 2019-04-18. Multi-stage Antenna Selection for Adaptive Beamforming in MIMO Arrays. https://doi.org/10.1109/tsp.2020.2973544

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