四川大学学报：工程科学版2012，Vol.44Issue(3)：159-163,5.
低复杂度的OFDM信号信噪比的盲估计
Blind SNR Estimation Scheme for OFDM Signals with Low Complexity
摘要
Abstract
The traditional blind signal to noise ratio（SNR） estimation algorithms for orthogonal frequency division multiplexing（OFDM） signals have the problems of poor performance and high computation complexity in low SNR and multi-path channel conditions.In order to treat these problems,a novel blind SNR estimation method for OFDM signals was proposed.Firstly,the AR model was established to estimate the power spectrum of the received observed signal.Secondly,the bandwidth was estimated by using second-order and fourth-order cumulants combined characteristic quantity and with jump edge extraction method.Finally,the SNR was estimated by calculating the in-band total power and the out-band noise power.The simulation results showed that the proposed method do not need any prior information and have better performance and lower computation complexity,which is more suitable for real-time non-cooperative communication systems.关键词
正交频分复用（OFDM）/信噪比估计/带宽估计/高阶累积量/空载波Key words
orthogonal frequency division multiplexing(OFDM)/signal to noise ratio estimation/bandwidth estimation/higher order cumulants/virtual carriers分类
信息技术与安全科学引用本文复制引用
李兵兵,曹超凤,刘明骞,曾华阳..低复杂度的OFDM信号信噪比的盲估计[J].四川大学学报：工程科学版,2012,44(3):159-163,5.基金项目
国家自然科学基金资助项目 （）
国家高技术研究发展计划资助项目 （）
高等学校学科创新引智计划资助项目 （）
