中文摘要：

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。

英文摘要：

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.