Hybrid Precoding for HAP Massive MIMO Systems. - Pingping Ji; Lingge Jiang; Chen He 001; Di He 002 (SINC, 2019)

Graph Based User Clustering for HAP Massive MIMO Systems With Two-stage Beamforming. - Pingping Ji; Lingge Jiang; Chen He 001; Di He 002 (WPMC, 2019)

Two-Stage Precoding Design in Rician Channel for HAP Massive MIMO Systems. - Di Zong; Lingge Jiang; Chen He 001; Pingping Ji; Di He 002 (WPMC, 2019)

SLNR Based Hybrid Precoding for HAP Massive MIMO Systems with Limited RF Chains. - Jian Zhang; Lingge Jiang; Pingping Ji; Chen He 001; Di He 002; Wenjun Wu (ISCAS, 2020)

A Modified K-means User Grouping Design for HAP Massive MIMO Systems. - Guorong Zhang; Lingge Jiang; Pingping Ji; Shiyi Zou; Chen He 001; Di He 002 (NaNA, 2021)

Beam Selection Algorithm for Beamspace HAP-MIMO Systems Based on Statistical CSI. - Shiyi Zou; Lingge Jiang; Pingping Ji; Chen He 001; Di He 002; Guorong Zhang (NaNA, 2021)

Energy-Efficient Beamforming for Beamspace HAP-NOMA Systems. - Pingping Ji; Lingge Jiang; Chen He 001; Zhuxian Lian; Di He 002 (IEEE Commun. Lett., 2021)

Geometry-Based UAV-MIMO Channel Modeling Assisted by Intelligent Reflecting Surface. - Zhuxian Lian; Pingping Ji; Yajun Wang 002; Yinjie Su; Biao Jin; Zhenkai Zhang; Zhibin Xie; Si Li (IEEE Trans. Veh. Technol., 2022)

A Novel Geometry-Based 3-D Wideband Channel Model and Capacity Analysis for IRS-Assisted UAV Communication Systems. - Zhuxian Lian; Yinjie Su; Yajun Wang 002; Pingping Ji; Biao Jin; Zhenkai Zhang; Zhibin Xie (IEEE Trans. Wirel. Commun., 2023)

Dynamic Hybrid Beamforming-Based HAP Massive MIMO with Statistical CSI. - Pingping Ji; Lingge Jiang; Chen He 001; Di He 002; Zhuxian Lian (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024)

SLNR-Based Joint Precoding for RIS Aided Beamspace HAP-NOMA Systems. - Pingping Ji; Lingge Jiang; Chen He 001; Di He 002; Zhuxian Lian (IEICE Trans. Commun., 2024)

A Novel Beam Channel Model and Capacity Analysis for UAV-Enabled Millimeter-Wave Communication Systems. - Zhuxian Lian; Yajun Wang 002; Yinjie Su; Pingping Ji (IEEE Trans. Wirel. Commun., 2024)

Active RIS Aided NOMA for HAP-MISO Systems. - Pingping Ji; Lingge Jiang; Chen He 001; Zhuxian Lian; Di He 002 (IEEE Wirel. Commun. Lett., 2024)