Phase noise correction for OFDM signal based on DCT approach and variational inference  

作　　者：CHEN Peng LI Nan LI Ju-hu HE Zhi-qiang WU Wei-ling 

机构地区：[1]Key Laboratory of Universal Wireless Communications,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2012年第3期27-32,共6页中国邮电高校学报（英文版）

基　　金：supported by the National Basic Research Program of China (2009CB320401);the National Key Scientific and Technological Project of China (2012ZX03004005-002,2010ZX03003-001);the National Natural Science Foundation of China (61171099)

摘　　要：A novel scheme to joint phase noise （PHN） correcting and channel noise variance estimating for orthogonal frequency division multiplexing （OFDM） signal was proposed, The new scheme was based on the variational Bayes （VB） method and discrete cosine transform （DCT） approximation. Compared with the least squares （LS） based scheme, the proposed scheme could overcome the over-fitting phenomenon and thus lead to an improved performance. Computer simulations showed that the proposed VB based scheme outperforms the existing LS based schemeA novel scheme to joint phase noise （PHN） correcting and channel noise variance estimating for orthogonal frequency division multiplexing （OFDM） signal was proposed, The new scheme was based on the variational Bayes （VB） method and discrete cosine transform （DCT） approximation. Compared with the least squares （LS） based scheme, the proposed scheme could overcome the over-fitting phenomenon and thus lead to an improved performance. Computer simulations showed that the proposed VB based scheme outperforms the existing LS based scheme

关 键 词：variational Bayes method discrete cosine transform phase noise OFDM 

分 类 号：TN911.3[电子电信—通信与信息系统] TN74[电子电信—信息与通信工程]