Spectral‐Energy Efficiency Tradeoff in Mixed‐ADC Massive MIMO Uplink with Imperfect CSI. Issue 3 (1st May 2019)

• Record Type: Journal Article
• Authors: Ding, Qingfeng; Jing, Yindi
• Is Part Of: Chinese journal of electronics. Volume 28:Issue 3(2019)
• Page Start: 618
• Page End: 624
• Publication Date: 2019-05-01
• Subjects: Massive MIMO -- Mixed‐ADC receiver -- Spectral‐energy efficiency tradeoff -- Gradient search -- Imperfect channel state information; analogue‐digital conversion -- channel estimation -- MIMO communication -- optimisation -- radio links -- radiofrequency interference; mixed‐ADC massive MIMO uplink -- imperfect CSI -- uplink multiuser -- multioutput system -- imperfect Channel state information -- closed‐form approximation -- general mixed ADC structure -- ADC resolution profile optimization problem -- ADC resolution design -- SE‐EE tradeoff -- spectral‐energy efficiency tradeoff -- analog‐to‐digital converter architecture -- spectral efficiency -- base station antenna -- SE region -- receive power consumption -- receive energy efficiency -- uniform‐ADC architecture; Electronics -- Periodicals; Electronics -- China -- Periodicals; Electronics; China; Periodicals; 621.38105
• DOI: 10.1049/cje.2019.02.010
• Languages: English
• ISSNs: 1022-4653

Abstract

Abstract : An uplink multi‐user massive Multi‐input multi‐output (MIMO) system is considered with a mixed Analog‐to‐digital converter (ADC) architecture under imperfect Channel state information (CSI). A closed‐form approximation for the Spectral efficiency (SE) is derived for a general mixed ADC structure with any resolution profile. To achieve a balance between the SE and receive Energy efficiency (EE) of the system, the ADC resolution profile optimization problem that maximizes a linear combination of the SE and the Base station (BS) receive power consumption is formulated. An algorithm based on gradient search is proposed whose complexity is linear in the number of BS antennas. Numerical results verify that the proposed ADC resolution design largely outperforms the two‐level structure especially in the lower SE region and provides more choices than the uniform‐ADC architecture for resolving the SE‐EE tradeoff.