Title :
Doppler spread estimation for OFDM systems using Newton polynomials
Author :
Ali, Ali Ramadan ; Balalem, Atallah ; Khanzada, Tariq ; Machac, Jan ; Omar, Abbas
Author_Institution :
Dept. of Microwave & Commun. Eng., Magdeburg Univ., Magdeburg
Abstract :
This paper presents a method of estimating the Doppler spread for OFDM systems in rapidly time-variant channels. The method utilizes an approximation of the time variation of the channel by considering a few Newton polynomials over five successive OFDM symbols. Doppler spread is estimated in the frequency domain from the off- diagonals of the approximated channel matrix.
Keywords :
Doppler effect; Newton method; OFDM modulation; estimation theory; frequency-domain analysis; matrix algebra; polynomial approximation; time-varying channels; Doppler spread estimation; Newton polynomial; OFDM system; approximated channel matrix; frequency domain; time-variant channel; AWGN; Baseband; Digital video broadcasting; Interference; Interpolation; OFDM modulation; Phase noise; Polynomials; Quadrature amplitude modulation; Wiener filter; Channel approximation; Doppler estimation; ICI; OFDM;
Conference_Titel :
Radioelektronika, 2008 18th International Conference
Conference_Location :
Prague
Print_ISBN :
978-1-4244-2087-2
Electronic_ISBN :
978-1-4244-2088-9
DOI :
10.1109/RADIOELEK.2008.4542713
