论文部分内容阅读
在通信系统中,一直存在着频率选择性的衰落,以及噪声的干扰和码间串扰。衰落包括快衰落和慢衰落。这些问题都会让通信系统的性能和质量受到严重的影响。正交频分复用技术OFDM,此技术常常会被用于抵抗外界干扰较差的地方的传输介质中。就是解决这些问题的方法之一。使用OFDM调制技术可以为应急通讯发展开辟更为广阔的前景。本文将详细的分析和研究该技术。
In communication systems, there has been a fading of frequency selectivity, as well as noise interference and intersymbol interference. Fading includes fast fading and slow fading. These problems can have a serious impact on the performance and quality of the communications system. Orthogonal Frequency Division Multiplexing (OFDM) technology, which is often used in transmission media to resist outside interference. It is one of the ways to solve these problems. Using OFDM modulation technology can open up a broader prospect for the development of emergency communications. This article will be a detailed analysis and research of the technology.