TY - GEN
T1 - Weighted graph coloring based softer pilot reuse for TDD massive MIMO systems
AU - Chang, Wenson
AU - Chan, Han Wei
N1 - Funding Information:
This work was jointly supported by the ministry of science and technology, Taiwan, under the contracts 105-2221-E-006-034 and 105-2221-E-006-032.
Publisher Copyright:
© 2018 IEEE.
PY - 2018/6/8
Y1 - 2018/6/8
N2 - In the massive multiple-input multiple-output (MIMO) systems, the serious pilot contamination problem severely restricts its ability to boost the spectrum utilization. To tackle this problem, the conventional concept of softly reusing the spectrum resources for the inner regions of the neighboring cells has been extended to reuse the pilot resources so as to accommodate more users. Alternatively, properly selecting the users to reuse the pilots among the neighboring cells can alleviate the pilot contamination problem as well. In this paper, we delicately integrate these two concepts to properly reuse the pilots allocated to the outer regions of the cells. By well designing the hazard-and secure-edge regions to manage the pilot reuse, the increment of interference can be effectively suppressed; and, consequently, the more accommodated users can contribute to the remarkably higher sum data rates.
AB - In the massive multiple-input multiple-output (MIMO) systems, the serious pilot contamination problem severely restricts its ability to boost the spectrum utilization. To tackle this problem, the conventional concept of softly reusing the spectrum resources for the inner regions of the neighboring cells has been extended to reuse the pilot resources so as to accommodate more users. Alternatively, properly selecting the users to reuse the pilots among the neighboring cells can alleviate the pilot contamination problem as well. In this paper, we delicately integrate these two concepts to properly reuse the pilots allocated to the outer regions of the cells. By well designing the hazard-and secure-edge regions to manage the pilot reuse, the increment of interference can be effectively suppressed; and, consequently, the more accommodated users can contribute to the remarkably higher sum data rates.
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U2 - 10.1109/WCNC.2018.8377094
DO - 10.1109/WCNC.2018.8377094
M3 - Conference contribution
AN - SCOPUS:85049194337
T3 - IEEE Wireless Communications and Networking Conference, WCNC
SP - 1
EP - 6
BT - 2018 IEEE Wireless Communications and Networking Conference, WCNC 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE Wireless Communications and Networking Conference, WCNC 2018
Y2 - 15 April 2018 through 18 April 2018
ER -