Uplink sum rate analysis of multi‐user massive MIMO–OFDM/OQAM systems in Ricean fading. Issue 11 (1st July 2020)

• Record Type: Journal Article
• Authors: Singh, Shivani; Singh, Prem; Vasudevan, Kasturi
• Is Part Of: IET communications. Volume 14:Issue 11(2020)
• Page Start: 1773
• Page End: 1782
• Publication Date: 2020-07-01
• Subjects: quadrature amplitude modulation -- OFDM modulation -- least mean squares methods -- channel estimation -- MIMO communication -- Rician channels -- radio receivers -- diversity reception -- multi‐access systems -- radiofrequency interference -- approximation theory -- statistical analysis -- cellular radio; uplink sum rate analysis -- Ricean fading -- offset quadrature amplitude modulation -- single‐cell multiuser massive multiple‐input multiple‐output systems -- uplink training‐based minimum mean square error channel estimation -- second‐order statistical characteristics -- achievable uplink sum rate -- MMSE channel estimate -- base station -- maximum‐ratio combining receiver -- multiuser massive MIMO–OQAM system -- closed‐form approximations -- multiuser massive MIMO–OFDM system -- zero‐forcing receiver -- orthogonal frequency division -- classic cyclic‐prefix OFDM‐based massive MIMO systems -- Ricean‐ K factor -- uplink rates; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2019.0913
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : This study investigates the uplink performance of offset quadrature amplitude modulation (OQAM)‐based orthogonal frequency division multiplexing (OFDM) waveform in single‐cell multi‐user massive multiple‐input multiple‐output (MIMO) systems over Ricean fading. An uplink training‐based minimum mean square error (MMSE) channel estimation by exploiting the inherent characteristics of OFDM/OQAM waveform is briefly presented. By leveraging the second‐order statistical characteristics of the intrinsic interference, the achievable uplink sum rates and corresponding closed‐form approximations are derived in the presence of MMSE channel estimate at the base station with zero‐forcing (ZF) and maximum‐ratio combining (MRC) receivers. Based on the above analytical results for the uplink rates, power scaling laws are also investigated. The effect of Ricean‐ K factor on the achievable uplink sum rate is also examined analytically for both the MRC and ZF receivers. Numerical results compare the performance of OFDM/OQAM and classic cyclic‐prefix OFDM‐based massive MIMO systems and also validate the various analytical expressions derived in this work.