TY - GEN
T1 - Channel reciprocity based frequency domain CQI feedback algorithm in TD-LTE-A systems
AU - Wu, Xuanli
AU - Fu, Nannan
AU - Sun, Lukuan
AU - Wang, Ye
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/10/2
Y1 - 2015/10/2
N2 - In TD-LTE-A systems, feedback information of uplink channel is of importance for eNodeB to perform downlink scheduling, beamforming, and adaptive Modulation and Coding Scheme (MCS). Channel quality indicator (CQI) is the most important parameter in all feedback information, and therefore, how to improve the accuracy of CQI feedback is a key issue for system configuration. In this paper, we propose a frequency domain CQI feedback algorithm, using channel capacity invariability criterion and channel reciprocity. Simulations show that periodic feedback with frequency domain CQI feedback algorithm can reduce system first retransmission ratio by about 4% and improve system throughput by about 7%, compared with normal periodic feedback Mode 1-1. In addition, compared with aperiodic feedback Mode 3-1, the proposed CQI feedback algorithm costs less signaling overhead, while keeping similar performance in terms of system first retransmission ratio.
AB - In TD-LTE-A systems, feedback information of uplink channel is of importance for eNodeB to perform downlink scheduling, beamforming, and adaptive Modulation and Coding Scheme (MCS). Channel quality indicator (CQI) is the most important parameter in all feedback information, and therefore, how to improve the accuracy of CQI feedback is a key issue for system configuration. In this paper, we propose a frequency domain CQI feedback algorithm, using channel capacity invariability criterion and channel reciprocity. Simulations show that periodic feedback with frequency domain CQI feedback algorithm can reduce system first retransmission ratio by about 4% and improve system throughput by about 7%, compared with normal periodic feedback Mode 1-1. In addition, compared with aperiodic feedback Mode 3-1, the proposed CQI feedback algorithm costs less signaling overhead, while keeping similar performance in terms of system first retransmission ratio.
KW - TD-LTE-A
KW - channel capacity invariability criterion
KW - channel reciprocity
KW - frequency domain CQI feedback
UR - https://www.scopus.com/pages/publications/84949486510
U2 - 10.1109/IWCMC.2015.7289249
DO - 10.1109/IWCMC.2015.7289249
M3 - 会议稿件
AN - SCOPUS:84949486510
T3 - IWCMC 2015 - 11th International Wireless Communications and Mobile Computing Conference
SP - 1174
EP - 1179
BT - IWCMC 2015 - 11th International Wireless Communications and Mobile Computing Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 11th International Wireless Communications and Mobile Computing Conference, IWCMC 2015
Y2 - 24 August 2015 through 28 August 2015
ER -