【作者】 宋立军； 唐友喜； 李少谦； 戚骥；

【Author】 Song Lijun Tang Youxi Li Shaoqian Qi JiNational Key Lab of Communication of UESTC, Chengdu, China, 610054

【机构】 电子科技大学通信抗干扰技术国家级重点实验室；

【摘要】 本文提出了一种新颖的差分检测方案:二维码片级差分检测,和传统的差分检测方案不同,这个方案在二维扩频系统中,对时频二维实现码片级差分检测,可以在时频二维同时降低信道衰落带来的影响。仿真结果表明,二维码片级差分检测在时间-频率双选择性衰落信道中的性能优于采用了码片级差分检测的一维扩频系统。更多还原

【Abstract】 A novel differential detection method, called Two-Dimensional chip-level differential detection (2D-CLDD) is proposed, the chip-level differential detection is performed in both time domain and frequency domain in two dimensional spread spectrum system, and the channel’s fading effect on both time domain and frequency domain can be decreased in 2D-CLDD. Compared with conventional one-dimensional spread-spectrum system, such as DS-SS and MC-CDMA chip-level differential detection, 2D-CLDD exhibits a beatter performance in time-frequency double selective fading channels.更多还原