Title :
Totally blind channel estimation for OFDM over fast varying mobile channels
Author :
Necker, Marc C. ; Stüber, Gordon L.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
A blind channel estimation scheme for OFDM is proposed. The algorithm is based on the ML-principle and features a very fast convergence rate. No reference symbols are needed to resolve the phase ambiguity. Simulations show the performance in mobile environments at high Doppler frequencies and short to medium delay spreads. The proposed approach maximizes the spectral efficiency by avoiding any reference symbols or pilots, and it minimizes the BER by using a non-differential modulation scheme
Keywords :
Doppler effect; OFDM modulation; convergence of numerical methods; delays; error statistics; fading channels; land mobile radio; maximum likelihood estimation; BER; MLE; OFDM; blind channel estimation; convergence rate; delay spread; fast varying mobile channels; high Doppler frequencies; mobile environments; nondifferential modulation; phase ambiguity; simulations; spectral efficiency; AWGN; Blind equalizers; Computational modeling; Discrete Fourier transforms; Frequency domain analysis; Land mobile radio; Maximum likelihood estimation; Mobile computing; OFDM modulation; Transfer functions;
Conference_Titel :
Communications, 2002. ICC 2002. IEEE International Conference on
Conference_Location :
New York, NY
Print_ISBN :
0-7803-7400-2
DOI :
10.1109/ICC.2002.996888
