TY - GEN
T1 - A two-stage interference alignment scheme for two-cell downlink MIMO cellular network with delayed CSIT
AU - Xu, Liyu
AU - Liao, Xuewen
AU - Gao, Zhenzhen
AU - Wan, Jingke
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/7/5
Y1 - 2016/7/5
N2 - In this paper, we study the degree of freedom(DoF) for the two-cell downlink multiple-input multiple-output(MIMO) interference multiple access channel(IMAC) with the delayed channel state information at the transmitters(CSIT). We propose a two-stage interference alignment scheme(TSIA) which makes full use of both the outdated and the current CSIT to align not only the interference from the adjacent cell onto the zero space, but also the intra-cell interference onto the subspace spanned by the previously received interference signals, respectively. Based on the TSIA method, we characterize the sum DoF of the network and the result shows the significant gain compared with the traditional TDMA-ZF scheme. Furthermore, the trend of the sum rate of the network well coincides with the analysis of DoF, which verifies our work.
AB - In this paper, we study the degree of freedom(DoF) for the two-cell downlink multiple-input multiple-output(MIMO) interference multiple access channel(IMAC) with the delayed channel state information at the transmitters(CSIT). We propose a two-stage interference alignment scheme(TSIA) which makes full use of both the outdated and the current CSIT to align not only the interference from the adjacent cell onto the zero space, but also the intra-cell interference onto the subspace spanned by the previously received interference signals, respectively. Based on the TSIA method, we characterize the sum DoF of the network and the result shows the significant gain compared with the traditional TDMA-ZF scheme. Furthermore, the trend of the sum rate of the network well coincides with the analysis of DoF, which verifies our work.
UR - https://www.scopus.com/pages/publications/84979774672
U2 - 10.1109/VTCSpring.2016.7504115
DO - 10.1109/VTCSpring.2016.7504115
M3 - 会议稿件
AN - SCOPUS:84979774672
T3 - IEEE Vehicular Technology Conference
BT - 2016 IEEE 83rd Vehicular Technology Conference, VTC Spring 2016 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 83rd IEEE Vehicular Technology Conference, VTC Spring 2016
Y2 - 15 May 2016 through 18 May 2016
ER -