Analysis of dense array massive MIMO with practical constraints
Conference: WSA & SCC 2023 - 26th International ITG Workshop on Smart Antennas and 13th Conference on Systems, Communications, and Coding
02/27/2023 at Braunschweig, Germany
Proceedings: ITG-Fb. 308: WSA & SCC 2023
Pages: 6Language: englishTyp: PDF
Authors:
Deshpande, Nitish Vikas; Castellanos, Miguel R.; Heath, Robert W. Jr. (ECE Department, NC State University, Raleigh, USA)
Khosravirad, Saeed R.; Du, Jinfeng; Viswanathan, Harish (Nokia Bell Labs, USA)
Abstract:
Practical constraints on hardware limit the benefit of super-directive dense antenna arrays for massive MIMO. We analyze the signal-to-noise ratio (SNR) at the receiver and its dependence on the matching network strategy with a constraint on the total power supplied by power amplifiers (PA) as opposed to that of the radiated power. We consider several beamforming strategies and derive optimal PA current based on (a) phase-only versus phase and magnitude beamforming and (b) frequency-flat versus frequency-selective beamforming. Through simulations, we study the impact of variation in number of antennas/ interantenna spacing, frequency, angle, matching network strategy, and beamforming strategy on the received SNR.