摘要
结合我校为研究生所开设的现代通信系统课程,设计了OFDM通信系统实验的一个拓展内容——循环前缀长度对OFDM系统性能的影响。根据既有的OFDM实验系统模型,对OFDM系统循环前缀长度进行了实验分析,得出当满足CP长度大于最大时延扩展时,CP长度越小越好,即CP长度等于最大时延扩展时OFDM系统性能最佳。应用Matlab仿真,得到最大时延扩展、循环前缀长度和误码率彼此之间相互的关系曲线,结果表明实验与理论一致。
Combined with school＇s graduate course of modern communications systems,an expanded content of OFDM communication system experiments was designed to deal with the influence of the OFDM system performance by cyclic prefix length. According to the existing experimental OFDM system model,an experimental analysis was carried out on cyclic prefix length,the conclusion was that CP length should be as small as possible when CP length is longer than the maximum delay spread. In other words,OFDM system performance reaches the best when CP length is equal to the maximum delay spread. By using Matlab the relationship curves for the maximum delay spread,cyclic prefix length and bit error rate were obtained. The experimental results met with the theory analysis.
出处
《实验室研究与探索》
CAS
北大核心
2015年第7期117-121,共5页
Research and Exploration In Laboratory
基金
教育部第六批国家特色专业建设项目(TS1Z293)
江苏省自然科学基金项目(No.BK20130199)
