Existing design approaches for hybrid precoding with dynamic array of subarrays architecture (DAoSA) implicitly rely on the assumption of infinite-resolution phase shifters (PSs) and digital to analog converters (DACs). However, ideal PSs and DACs are impractical and deviation from this assumption may lead to significant performance degradation. In this paper, we investigate the design of a DAoSA hybrid precoder that employs low-resolution PSs and DACs with adjustable switch connections. The design aims to minimize the power consumption while achieving high spectral efficiency under quantization constraints. To solve this complex problem, we develop a joint optimization approach comprised of three interwined algorithms: element-by-element quantized PS (EBE-QPS), DAC bit allocation (DAC-BA) and switch network design (SND). Numerical simulations show that our proposed approach for DAoSA hybrid precoder design with finite-resolution PSs and DACs leads to reduced power consumption compared to existing benchmarks while maintaining the required spectral efficiency.
A Dynamic Array-of-Subarrays Architecture With Quantized Phase Shifters and DACs
2023-10-10
1301364 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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