Title :
Differential space-time coding for frequency-selective channels
Author :
Diggavi, S.N. ; Al-Dhahir, N. ; Stamoulis, A. ; Calderbank, A.R.
Author_Institution :
AT&T Shannon Lab., Florham Park, NJ, USA
fDate :
6/1/2002 12:00:00 AM
Abstract :
We introduce two space-time transmission schemes which allow full-rate and full-diversity noncoherent communications using two transmit antennas over fading frequency-selective channels. The first scheme operates in the frequency domain where it combines differential Alamouti (seeIEEE J. Select. Areas Commun., vol.16, p.1451-58, Nov. 1998) space-time block-coding (STBC) with OFDM. The second scheme operates in the time domain and employs differential time-reversal STBC to guarantee blind channel identifiability without the need for temporal oversampling or multiple receive antennas.
Keywords :
OFDM modulation; block codes; channel coding; diversity reception; fading channels; frequency-domain analysis; identification; modulation coding; multipath channels; time-domain analysis; transmitting antennas; OFDM; blind channel identification; differential space-time block-coding; differential space-time coding; differential time-reversal STBC; fading channels; frequency domain; frequency-selective channels; full-diversity noncoherent communications; full-rate noncoherent communications; multipath diversity gain; multiple receive antennas; receive antenna; second-order statistics; space-time transmission; spatial diversity gain; symbol-spaced samples; temporal oversampling; time domain method; transmit antennas; Additive white noise; Fading; Finite impulse response filter; Frequency domain analysis; Frequency estimation; Gaussian noise; OFDM; Receiving antennas; Statistics; Transmitting antennas;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2002.1010872
