This work is supported in part by the National Science Foundation of China (No.61601509) and the China Postdoctoral Science Foundation Grant (No.2016M603045). Thanks for the reviewers’ comments.
机构署名：
本校为其他机构
院系归属：
国家数字化学习工程技术研究中心
摘要：
Downlink channel state information (CSI) is critical in a frequency division duplexing (FDD) massive multiple-input multiple-output (MIMO) system. We exploit the reciprocity between uplink and downlink channels in angular domain and diagnose the supports of downlink channel from the estimated uplink channel. While the basis mismatch effects will damage the sparsity level and the path angle deviations between uplink and downlink transmission paths will induce differences in channel supports, a downlink support diagnosis algorithm based on the DBSCAN (density-based spatial clustering of applicat...
