TY - GEN
T1 - Sectoring in multi-cell massive MIMO systems
AU - Shahsavari, Shahram
AU - Hassanzadeh, Parisa
AU - Ashikhmin, Alexei
AU - Erkip, Elza
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/7/2
Y1 - 2017/7/2
N2 - In this paper, the downlink of a typical massive MIMO system is studied when each base station is composed of three antenna arrays with directional antenna elements serving 120° of the two-dimensional space. A lower bound for the achievable rate is provided. Furthermore, a power optimization problem is formulated and as a result, centralized and decentralized power allocation schemes are proposed. The simulation results reveal that using directional antennas at base stations along with sectoring can lead to a notable increase in the achievable rates by increasing the received signal power and decreasing 'pilot contamination' interference in multi-cell massive MIMO systems. Moreover, it is shown that using optimized power allocation can significantly increase the 0.95-likely rate in the system.
AB - In this paper, the downlink of a typical massive MIMO system is studied when each base station is composed of three antenna arrays with directional antenna elements serving 120° of the two-dimensional space. A lower bound for the achievable rate is provided. Furthermore, a power optimization problem is formulated and as a result, centralized and decentralized power allocation schemes are proposed. The simulation results reveal that using directional antennas at base stations along with sectoring can lead to a notable increase in the achievable rates by increasing the received signal power and decreasing 'pilot contamination' interference in multi-cell massive MIMO systems. Moreover, it is shown that using optimized power allocation can significantly increase the 0.95-likely rate in the system.
UR - http://www.scopus.com/inward/record.url?scp=85051017815&partnerID=8YFLogxK
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U2 - 10.1109/ACSSC.2017.8335510
DO - 10.1109/ACSSC.2017.8335510
M3 - Conference contribution
AN - SCOPUS:85051017815
T3 - Conference Record of 51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017
SP - 1050
EP - 1055
BT - Conference Record of 51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017
A2 - Matthews, Michael B.
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017
Y2 - 29 October 2017 through 1 November 2017
ER -