TY - GEN
T1 - QAM constellation division based user grouping transmission for massive MIMO uplink systems
AU - Zong, Jingjie
AU - Han, Gangtao
AU - Zhang, Dalong
AU - Zhang, Di
AU - Mu, Xiaomin
N1 - Funding Information:
This paper is supported by National Science and Technology Major Projects of China under Grant No. 2017ZX03001001-004 and the Science and Technology Development Project of Henan Province under Grant No. 192102210090.
Publisher Copyright:
© 2019 IEEE.
PY - 2019/8
Y1 - 2019/8
N2 - In this paper, a novel QAM constellation division based user grouping communication scheme is proposed for the massive MIMO uplink systems. In the proposed scheme, orthogonal pilot sequences are assigned to adjacent cells to eliminate the pilot contamination between adjacent cells, while the users in the same cell are divided into groups and each group uses one pilot sequence. In each group, a QAM constellation is divided into two PAM constellations for the two users to implement uplink transmission. With the help of the pilot sequences, the base station (BS) firstly estimates the sum channel of each group, and then executes signal detection by adopting the matched filter detector based on the estimated sum channel as well as the asymptotic orthogonality between different channels while the number of BS antennas goes to infinity. Furthermore, the effect of the large-scale fading coefficients of the channels on the average symbol error rate (SER) of all the users is investigated, and an explicit and concrete user grouping approach is proposed to decrease the average SER. Finally, computer simulations illustrate that our proposed communication scheme performs well and the proposed user grouping approach is obviously effective.
AB - In this paper, a novel QAM constellation division based user grouping communication scheme is proposed for the massive MIMO uplink systems. In the proposed scheme, orthogonal pilot sequences are assigned to adjacent cells to eliminate the pilot contamination between adjacent cells, while the users in the same cell are divided into groups and each group uses one pilot sequence. In each group, a QAM constellation is divided into two PAM constellations for the two users to implement uplink transmission. With the help of the pilot sequences, the base station (BS) firstly estimates the sum channel of each group, and then executes signal detection by adopting the matched filter detector based on the estimated sum channel as well as the asymptotic orthogonality between different channels while the number of BS antennas goes to infinity. Furthermore, the effect of the large-scale fading coefficients of the channels on the average symbol error rate (SER) of all the users is investigated, and an explicit and concrete user grouping approach is proposed to decrease the average SER. Finally, computer simulations illustrate that our proposed communication scheme performs well and the proposed user grouping approach is obviously effective.
KW - Constellation division
KW - Massive MIMO
KW - Pilot contamination
KW - User grouping
UR - http://www.scopus.com/inward/record.url?scp=85074088187&partnerID=8YFLogxK
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U2 - 10.1109/ICCChina.2019.8855893
DO - 10.1109/ICCChina.2019.8855893
M3 - Conference contribution
AN - SCOPUS:85074088187
T3 - 2019 IEEE/CIC International Conference on Communications in China, ICCC 2019
SP - 818
EP - 822
BT - 2019 IEEE/CIC International Conference on Communications in China, ICCC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE/CIC International Conference on Communications in China, ICCC 2019
Y2 - 11 August 2019 through 13 August 2019
ER -