Title :
A channel estimation algorithm for MIMO-SCFDE
Author :
Siew, Jiun ; Coon, Justin ; Piechocki, Robert J. ; Dowler, Alex ; Nix, Andrew ; Beach, Mark ; Armour, Simon ; McGeehan, Joe
Author_Institution :
Centre for Commun. Res., Univ. of Bristol, UK
Abstract :
This letter proposes a novel method for channel estimation in a single-carrier multiple input-multiple output (MIMO) system with frequency-domain equalization/detection. To this end, we construct novel short MIMO training sequences that have constant envelope in the time domain to preclude the peak-to-average power ratio problem encountered in many systems that utilize the frequency domain for data recovery. Simultaneously, the spectrum in the frequency domain is flat except for a grid of s for predefined frequency tones. Armed with these sequences, we provide an algorithm that is optimal in the least squares (LS) sense at a potentially low computational cost. Results show that the algorithm performs identically to other proposed LS techniques. Furthermore, the algorithm is extremely bandwidth efficient in that the total training overhead required to obtain full CSI is just one block.
Keywords :
MIMO systems; OFDM modulation; channel estimation; frequency-domain analysis; least squares approximations; sequences; time-domain analysis; MIMO training sequences; OFDM; bandwidth efficient; channel estimation algorithm; constant envelope; frequency-domain equalization-detection; least squares sense; single-carrier multiple input-multiple output system; time domain; Bandwidth; Broadband antennas; Channel estimation; Discrete Fourier transforms; Frequency domain analysis; MIMO; OFDM; Peak to average power ratio; Receiving antennas; Transmitting antennas; Channel estimation; MIMO; OFDM; SCFDE;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2004.833797