Title :
Multiple-input multiple-output least-squares constant modulus algorithms
Author :
Sansrimahachai, P. ; Ward, D.B. ; Constantinides, A.G.
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll., London, UK
Abstract :
We propose novel blind separation techniques for multiple-input multiple-output systems based on a least-squares constant modulus algorithm (LSCMA). To ensure that each output signal is extracted from different input signals, the proposed algorithms have been derived by using successive interference cancellation and the Gram-Schmidt orthogonalization procedure. The performance is observed through computer simulations and compared with the multitarget LSCMA (MT-LSCMA) and LS multiuser CMA (LS-MU-CMA). Simulation results have shown that the proposed algorithms exhibit better performance in terms of both bit error rate (BER) and convergence speed.
Keywords :
MIMO systems; blind source separation; convergence of numerical methods; error statistics; interference suppression; least squares approximations; radio links; radiofrequency interference; receiving antennas; transmitting antennas; BER; Gram-Schmidt orthogonalization procedure; MIMO systems; bit error rate; blind source separation; convergence speed; least-squares constant modulus algorithms; least-squares multiuser CMA; multiple-input multiple-output systems; multitarget least-squares CMA; successive interference cancellation; Bit error rate; Computational modeling; Computer simulation; Convergence; Educational institutions; Interference cancellation; Iterative algorithms; MIMO; Receiving antennas; Transmitting antennas;
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
DOI :
10.1109/GLOCOM.2003.1258603