文献类型：期刊文献

英文题名：An Improved Multicell MMSE Channel Estimation in a Massive MIMO System

作者：Li, Ke[1];Song, Xiaoqin[2];Ahmad, M. Omair[3];Swamy, M. N. S.[3]

第一作者：李克

通讯作者：Li, K[1]

机构：[1]Beijing Union Univ, Coll Informat Technol, Beijing 100010, Peoples R China;[2]Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Nanjing 210016, Jiangsu, Peoples R China;[3]Concordia Univ, Dept Elect & Comp Engn, Montreal, PQ H3G 1M8, Canada

第一机构：北京联合大学智慧城市学院

通讯机构：[1]corresponding author), Beijing Union Univ, Coll Informat Technol, Beijing 100010, Peoples R China.|[1141734]北京联合大学智慧城市学院;[11417]北京联合大学;

年份：2014

卷号：2014

外文期刊名：INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION

收录：;EI(收录号：20142317785483);Scopus(收录号：2-s2.0-84901410242);WOS:【SCI-EXPANDED(收录号:WOS:000336152200001)】；

基金：This work was supported by the National Natural Science Foundation of China under Grant no. 61301103.

语种：英文

外文关键词：Energy efficiency - Large scale systems - MIMO systems

摘要：Massive MIMO is a promising technology to improve both the spectrum efficiency and the energy efficiency. The key problem that impacts the throughput of a massive MIMO system is the pilot contamination due to the nonorthogonality of the pilot sequences in different cells. Conventional channel estimation schemes cannot mitigate this problem effectively, and the computational complexity is increasingly becoming larger in views of the large number of antennas employed in a massive MIMO system. Furthermore, the channel estimation is always carried out with some ideal assumptions such as the complete knowledge of large-scale fading. In this paper, a new channel estimation scheme is proposed by utilizing interference cancellation and joint processing. Highly interfering users in neighboring cells are identified based on the estimation of large-scale fading and then included in the joint channel processing; this achieves a compromise between the effectiveness and efficiency of the channel estimation at a reasonable computational cost, and leads to an improvement in the overall system performance. Simulation results are provided to demonstrate the effectiveness of the proposed scheme.