Title :
A New Noise Variance Estimation Algorithm for Multiuser OFDM Systems
Author :
Yi, Wang ; Lihua, Li ; Ping, Zhang ; Zemin, Liu ; Yu, Zhou Ming
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
A new noise variance estimation algorithm is presented for a multiuser OFDM system. In this estimator , the noise variance is derived from the traditional channel estimation results and no additional system cost is needed. Its performance is analyzed theoretically. The computational complexity is small and its performance is robust to noise power. Simulation results show that under multi-path fading channel the proposed estimator can obtain accurate real time measurements of the noise variance.
Keywords :
channel estimation; fading channels; frequency division multiple access; channel estimation; multi-path fading channel; multiuser OFDM systems; noise variance estimation algorithm; AWGN; Additive white noise; Channel estimation; Communication systems; Costs; Delay estimation; Gaussian noise; OFDM; Signal to noise ratio; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-1144-3
Electronic_ISBN :
978-1-4244-1144-3
DOI :
10.1109/PIMRC.2007.4394318
