TY - Journal of Beijing University of Posts and Telecommunications A1 - GUAN Ming-xiang, WANG Le, GUO Qing T1 - Multi-Layer Ring Cellular Structure for HAPS Communication Y1 - 2014-04-08 00:00:00.0 JF - Journal of Beijing University of Posts and Telecommunications JO - Journal of Beijing University of Posts and Telecommunications SP - 48 EP - 52 VL - 37 IS - 2 UR - {https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2014.02.011} N1 - 10.13190/j.jbupt.2014.02.011 ER -