Title :
CM-based channel estimators for space-time block-coded M-PSK and M-QAM systems
Author :
Xu, Changjiang ; LE-NGOC, THO
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, Que., Canada
fDate :
7/1/2003 12:00:00 AM
Abstract :
A constant modulus (CM)-based channel estimation scheme for space-time block-coded M-PSK and M-QAM transmission systems is derived. Exploiting the orthogonal structure of the space-time block coded transmission model, the analytical solutions to minimize the CM cost function are given for 2/sup k/ PSK (k>2) and 2/sup 2k/-QAM schemes, and used to derive the expressions for the CM-based channel estimators. Illustrative results on the performance are presented.
Keywords :
block codes; channel estimation; minimisation; mobile radio; phase shift keying; quadrature amplitude modulation; space-time codes; 2/sup 2k/-QAM; 2/sup k/ PSK; CM-based channel estimators; M-PSK; M-QAM; constant modulus scheme; cost function minimization; performance; space-time block codes; Analytical models; Block codes; Channel estimation; Cost function; Covariance matrix; Maximum likelihood decoding; Phase shift keying; Receiving antennas; Transmitting antennas;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2003.814717
