摘要
本文介绍了正交频分复用OFDM技术的基本原理,简要给出了TCM的一般概念与系统模型,并结合16QAM详细阐述了TCM的基本结构和原理,在此基础上把TCM与OFDM有机地结合起来,给出了基本原理和系统设计方案。经理论分析表明,TCM-OFDM系统有效地克服了频率选择性衰落对系统性能的影响,可使由于多径而产生的部分频率选择性衰落、时间选择性衰落及多普勒频移造成对正交性的影响减少到最低,提高系统传输的可靠性和有效性。
In this paper ,it has introduced OFDM principles.Generic conception and system model of TCM have been given and basal configuration of TCM based 16QAM has been expatiated in detail. Then it showed basal configuration and system design theory by TCM and OFDM banding together .TCM-OFDM system combated frequency selecting fading ,reduced the effection of part of time selecting fading , frequency selecting fading and Doppler shift in theory and improved the dependability and efficiency of system transmission.
出处
《微计算机信息》
北大核心
2007年第21期97-98,103,共3页
Control & Automation
基金
国家自然科学基金项目60332020:高速铁路智能交通综合信息系统关键技术的研究
