Title :
A new noise variance and post detection SNR estimation method for MIMO OFDM systems
Author :
Fei, Jiao ; Guangliang, Ren ; Zhe, Zhang
Author_Institution :
State Key Lab. of Integrated Service Networks, Xidian Univ., Xian
Abstract :
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.
Keywords :
MIMO communication; OFDM modulation; channel estimation; matrix decomposition; MIMO OFDM system; Q matrix; QR decomposition; channel estimation vector; noise variance; partial frequency domain transform matrix; post detection SNR estimation; Additive white noise; Frequency domain analysis; Frequency estimation; Gaussian noise; MIMO; Matrix decomposition; OFDM; Receiving antennas; Signal to noise ratio; Transmitting antennas; MIMO OFDM; QR decomposition; estimation; noise variance; post detection SNR;
Conference_Titel :
Communication Technology, 2008. ICCT 2008. 11th IEEE International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4244-2250-0
Electronic_ISBN :
978-1-4244-2251-7
DOI :
10.1109/ICCT.2008.4716185
