Energy-Efficient Bit Allocation for Resolution-Adaptive ADC in Multiuser Large-Scale MIMO Systems: Global Optimality
|Title:||Energy-Efficient Bit Allocation for Resolution-Adaptive ADC in Multiuser Large-Scale MIMO Systems: Global Optimality||Authors:||Nguyen, Kien-Giang; Vu, Quang-Doanh; Tran, Le-Nam; Juntti, Markku||Permanent link:||http://hdl.handle.net/10197/11914||Date:||8-May-2020||Online since:||2021-02-01T18:13:48Z||Abstract:||We consider uplink multiuser wireless communications systems, where the base station (BS) receiver is equipped with a large-scale antenna array and resolution adaptive analog-to-digital converters (ADCs). The aim is to maximize the energy efficiency (EE) at the BS subject to constraints on the users' quality-of-service. The approach is to jointly optimize both the number of quantization bits at the ADCs and the on/off modes of the radio frequency (RF) processing chains. The considered problem is a discrete nonlinear program, the optimal solution of which is difficult to find. We develop an efficient algorithm based on the discrete branch-reduce-and-bound (DBRnB) framework. It finds the globally optimal solutions to the problem. In particular, we make some modifications, which significantly improve the convergence performance. The numerical results demonstrate that optimizing jointly the number of quantization bits and on/off mode can achieve remarkable EE gains compared to only optimizing the number of quantization bits.||Funding Details:||Science Foundation Ireland
University College Dublin
|Type of material:||Conference Publication||Publisher:||IEEE||Copyright (published version):||2020 IEEE||Keywords:||Wireless communications; Resolution-adaptive ADC; Large-scale antenna systems; Energy efficiency; Discrete branch-reduce-and-bound||DOI:||10.1109/ICASSP40776.2020.9052945||Language:||en||Status of Item:||Peer reviewed||Is part of:||ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings||Conference Details:||The 45th International Conference on Acoustics, Speech, and Signal Processing, Barcelona, Spain, 4-8 May 2020||ISBN:||9781509066315||ISSN:||1520-6149||This item is made available under a Creative Commons License:||https://creativecommons.org/licenses/by-nc-nd/3.0/ie/|
|Appears in Collections:||Electrical and Electronic Engineering Research Collection|
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