摘要
OFDM系统对频率偏移极其敏感,会引入ICI(子载波间干扰),严重降低系统性能。因此,首先提出和理论论证了基于差分编码的ICI自消除法和基于参数调整的ICI自消除法。最后在LTE系统环境下进行仿真验证,实验结果证明前者可以提高LTE系统的带宽利用率,后者可提高LTE系统的CIR和BER性能。
OFDM system is sensitive to frequency offset. It leads to ICI(Inter-Carrier Interference) and reduces the performance of system seriously. In this paper, ICI self-cancellation scheme based on parameter adjustment and ICI self-cancellation scheme based on differential encoding are presented firstly and improved theoretically. The simulation indicates that The first scheme ameliorates CIR and reduces BER of LTE system, and the second scheme increases the spectrum efficiency of LTE system.
出处
《电脑知识与技术》
2013年第2X期1514-1516,共3页
Computer Knowledge and Technology
