A New Noise Variance and Post Detection SNR Estimation Method for MIMO OFDM Systems

作     者：Jiao Fei Ren Guangliang Zhang Zhe State Key Laboratory of Integrated Service Networks Xidian University Xi’an P.R.China 

会议名称：《2008 11th IEEE International Conference on Communication Technology(ICCT2008)》

会议日期：2008年

学科分类：0810[工学-信息与通信工程] 08[工学] 081001[工学-通信与信息系统] 

基　　金：supported by the National Natural Science Foundation of China(No. 60602063) the Natural Science Foundation of Shaanxi Province(Grant No. 2006F28) 

关 键 词：noise variance post detection SNR estimation MIMO OFDM QR decomposition 

摘      要：In this paper,a new noise variance and post detection SNR estimation algorithm is proposed for MIMO OFDM *** estimated channel vector is employed and multiplied by a special Q matrix which comes from the QR decomposition of a partial frequency domain transform *** noise components in the processed channel estimation vector are used to estimate the noise *** post detection SNR can be calculated out with the channel estimation results and the estimated noise *** results show that the proposed estimator can obtain accurate estimation ***,the new estimator is not sensitive to frequency selectivity of wireless channels.