Integrated Communications and Localization for Massive MIMO LEO Satellite Systems - You, Li; Qiang, Xiaoyu; Zhu, Yongxiang; Jiang, Fan; Tsinos, Christos G.; Wang, Wenjin; Wymeersch, Henk; Gao, X.; Ottersten, Björn E. (IEEE Transactions on Wireless Communications, 2024)