[Zeng, Zhuanwu;Zhang, Guangfu;Li, Mengxing] Hunan City Univ, Commun & Elect Engn Sch, Yiyang 413000, Hunan, Peoples R China.^[Zhang, Liqiang] Zhengzhou Technol Coll, Zhengzhou 450121, Peoples R China.^[Huang, Longyang] Civil Aviat Flight Univ China, Air Traff Management Coll, Guanghan 618307, Sichuan, Peoples R China.