%L scholars417
%K Acoustic intensity; Adaptive modulation; Computer networks; Delta modulation; Frequency allocation; Frequency division multiplexing; Information services; Mean square error; Modulation; Orthogonal frequency division multiplexing; Signal to noise ratio; Telecommunication systems, Colored noises; Noise power estimation; OFDM; OFDM systems; Second-order statistics; SNR; SNR estimations; Squared errors; Wavelet packets, Wireless networks
%C Porto
%X In this paper, a noise power estimator based on one OFDM preamble is proposed. The estimator, unlike others, performs noise power estimation at the front-end of the receiver. The proposed estimator takes into consideration the different noise power levels over the OFDM sub-carriers. The OFDM band is divided into several sub-bands using wavelet packet and noise in each sub-band is considered white. The second-order statistics of the transmitted OFDM preamble are calculated in each sub-band and the noise power is estimated. The proposed estimator is compared with Reddy's estimator for colored noise in terms of mean squared error (MSE).
%O cited By 0; Conference of International Conference on Wireless Information Networks and Systems, WINSYS 2008 ; Conference Date: 26 July 2008 Through 29 July 2008; Conference Code:74935
%D 2008
%A R.S. Manzoor
%A V. Jeoti
%A N. Kamel
%A M. Asif
%P 140-144
%T A novel front-end noise power and snr estimation using wavelet-packets in OFDM systems
%J WINSYS 2008 - International Conference on Wireless Information Networks and Systems, Proceedings