加窗技术在NC-OFDM系统中应用的研究  

An Application Research on Adding Windows Technology in NC-OFDM Systems

作　　者：姬艳[1] 陈阳[1] 

机构地区：[1]东南大学信息科学与工程学院,南京210096

出　　处：《电脑与信息技术》2012年第1期5-8,共4页Computer and Information Technology

基　　金：国家自然科学基金资助项目(项目编号:60872074)

摘　　要：文章研究了加窗技术的内在机理及其在NC-OFDM系统中的应用,分别针对两种不同的窗函数和滚降系数对NC-OFDM信号的功率谱带外衰减进行仿真比较。仿真结果表明:加窗技术改善了NC-OFDM符号的带外功率谱扩散,提高了系统性能;同时,对于不同的窗函数、滚降系数,信号带外辐射功率也不同。This paper discusses the inherent mechanism of adding windows technology and its appfication in NC-OFDM systems, for two windows and different roll-off factors, the simulation is conducted to compare the performance of the power spectrum out-of-band attenuation of the NC-OFDM signals. The results indicate that the attenuation is improved due to the added windows; meanwhile, the signals out-of-band attenuation is also different because of various windows and roll-off factors.

关 键 词：认知无线电 NC-OFDM 功率谱带外衰减 升余弦窗 改进升余弦窗 

分 类 号：TN761[电子电信—电路与系统]