Novel time-frequency differential space-time modulation for multi-antenna OFDM systems
Tian Jifeng, Jiang Haining, Song Wentao, Lwo Hanwen & Xu Youyun
Journal of Systems Engineering and Electronics . 2006, (1): 54 -58 .  DOI: 10.1016/S1004-4132(06)60010-8