Title :
A Doppler spread estimator design for mobile OFDM systems
Author :
Qiaoli, Lu ; Wei, Chen ; Tao, Xie ; Biqi, Long
Author_Institution :
Sch. of Inf. Eng., Wuhan Univ. of Technol. Wuhan, Wuhan, China
Abstract :
In this paper, an efficient and practical design for Doppler spread estimation in mobile OFDM systems are described. A channel auto-correlation function algorithm is proposed for Doppler spread estimation. The Doppler spread estimator is based on finding the auto-correlation function of time domain channel estimates over several OFDM symbols. The estimation performance of the estimator is evaluated via computer simulation using national standard digital television system DTMB signal transmission format. Simulation results show that the proposed Doppler spread estimator can provide high estimation accuracy for a wide range of Doppler spread. Moreover, the proposed algorithm relies on periodic channel estimate and can also be applied into other OFDM systems with known pilot symbols inserted within the data fields.
Keywords :
Doppler effect; OFDM modulation; Rayleigh channels; channel estimation; correlation methods; digital television; mobile radio; multimedia communication; DTMB signal transmission format; Doppler spread estimator design; Rayleigh fading channel; channel auto-correlation function algorithm; mobile OFDM system; national standard digital television system; time domain channel estimate; Autocorrelation; Channel estimation; Context modeling; Design engineering; Digital TV; Fading; Maximum likelihood estimation; Multimedia communication; OFDM; TV broadcasting; DTMB; Doppler spread; OFDM; auto-correlation; channel estimate; rayleigh fading channel;
Conference_Titel :
Communication Systems, 2008. ICCS 2008. 11th IEEE Singapore International Conference on
Conference_Location :
Guangzhou
Print_ISBN :
978-1-4244-2423-8
Electronic_ISBN :
978-1-4244-2424-5
DOI :
10.1109/ICCS.2008.4737342
