Title :
A space-time block-coded OFDM scheme for unknown frequency-selective fading channels
Author :
Uysal, Murat ; Al-Dhahir, Naofal ; Georghiades, Costas N.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
We introduce a space-time block-coded orthogonal frequency-division multiplexing (STBC-OFDM) selective fading channels which does not require channel knowledge either at the transmitter or at the receiver. The decoding algorithm is based on generalized maximum-likelihood sequence estimation. We investigate the performance of the proposed scheme over two-tap Rayleigh fading channels. Simulation results show the performance to be near optimum.
Keywords :
OFDM modulation; Rayleigh channels; block codes; decoding; maximum likelihood sequence estimation; modulation coding; phase shift keying; BPSK; STBC-OFDM; decoding algorithm; frequency-selective fading channels; generalized MLSE; generalized maximum-likelihood sequence estimation; orthogonal frequency-division multiplexing; performance; receiver; simulation results; space-time block coding; space-time block-coded OFDM; transmitter; two-tap Rayleigh fading channels; Block codes; Discrete Fourier transforms; Frequency division multiplexing; Frequency-selective fading channels; Maximum likelihood decoding; Maximum likelihood estimation; OFDM modulation; Receiving antennas; Transmitters; Transmitting antennas;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.957372
