Pilot Assignment for Joint Uplink-Downlink Spectral Efficiency Enhancement in Massive MIMO Systems With Spatial Correlation

• Published in: IEEE transactions on vehicular technology Vol. 70; no. 8; pp. 8292 - 8297
• Main Authors: Nguyen, Tien Hoa, Chien, Trinh Van, Ngo, Hien Quoc, Tran, Xuan Nam, Bjornson, Emil
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.08.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Channel estimation; Closed-form expression; Combinatorial optimization; Combinatorial optimization problems; Contamination; Correlated Rayleigh fading channels; Data communication; Data transmission; Downlink; Downlinking; Efficiency; Ergodic spectral efficiencies; Fading channels; Heuristic algorithms; Interference; Massive MIMO; Massive multiple-input- multiple-output system (MIMO); max-min fairness optimization; MIMO systems; Optimization; Optimization problems; pilot assignment; Power control; Rayleigh fading; Sequential algorithm; Signal to noise ratio; Spectral efficiencies; Uplink; max-min fairness optimization; pilot assignment; Channel estimation; Interference; Massive MIMO; Downlink; Data communication; Uplink; Contamination; Signal to noise ratio

This paper proposes a flexible pilot assignment method to jointly optimize the uplink and downlink data transmission in multi-cell Massive multiple input multiple output (MIMO) systems with correlated Rayleigh fading channels. By utilizing a closed-form expression of the ergodic spectral efficiency...