Warning: file_put_contents(/www/wwwroot/ppbbu/80125.cn/cache/7853539a148af5ed91c34540603c6e45.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/80125.cn/index.php on line 58 TDMA例句_TDMA英汉例句_TDMA双解例句_食材铺反向词典
The author has described several key techniques for improving the capacity of CDMA digital celullar system,comparing to the spectral efficiency of FDMA and TDMA cellular system. 本文对照频分多址和时分多址系统的频谱效率，阐述了码分多址系统提高系统容量的几项关键技术。