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A new noise variance and post detection SNR estimation method for MIMO OFDM systems

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3 Author(s)
Jiao Fei ; State Key Laboratory of Integrated Service Networks, Xidian University, Xi¿an, China ; Ren Guangliang ; Zhang Zhe

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

Published in:

Communication Technology, 2008. ICCT 2008. 11th IEEE International Conference on

Date of Conference:

10-12 Nov. 2008