摘要
第四代移动通信系统要求有更高的数据传输速率、更好的传输质量且同时能很好地克服多径衰落,消除高速数据传输时严重的符号间干扰并大大提高频谱利用率,正交频分复用OFDM技术作为一种强有力的数字调制方式,以其突出的优点成为4G移动通信系统的核心技术。在多径时延、信息速率以及带宽等特定背景条件确定的情况下,根据工程经验设计了一种适应该背景条件的突发OFDM传输系统,并且确定子载波数量、符号速率、OFDM帧结构等总体参数。最后给出了该OFDM传输系统设计结构示意图。
The fourth-generation mobile communication system requires higher data transmission rate, and better transmis-sion quality. At the same time, the system should overcome muhipath fading, eliminate the severe intersymbol interference in high-speed data transmission and greatly improve the spectrum utilization. As a powerful digital modulation method, orthogonal frequency division multiplexing （OFDM） becomes the key technology for 4G mobile communication system with its prominent ad- vantages. According to engineering experience, under the special condition of muhipath delay, information rate and bandwidth, a design scheme of burst OFDM transmission system is introduced in this paper. The number of subcarriers, the symbol rate and OFDM frame structure are also determined in the system. Finally, the schematic framework of the system is given.
出处
《现代电子技术》
2013年第1期54-56,63,共4页
Modern Electronics Technique
