Title :
Analysis of the LCDCM criterion for DS-CDMA blind multiuser detection
Author :
de Villiers, J.P. ; Linde, L.P.
Author_Institution :
Dept. of Electr., Electron. & Comput. Eng., Pretoria Univ., South Africa
Abstract :
In this paper we will see that the linearly constrained differential constant modulus (LCDCM) cost criterion is well suited for blind multiuser detection. Unlike the linearly constrained constant modulus (LCCM) cost function, it is not dependent on desired user amplitude to ensure a single optimum point. The global minimum of the LCDCM cost function will be established by proving the Hessian matrix positive definite at the single solution where the gradient function is zero.
Keywords :
code division multiple access; matrix algebra; minimisation; multiuser detection; spread spectrum communication; Hessian matrix; LCDCM cost criterion; blind multiuser detection; global minimum; gradient function; linearly constrained differential constant modulus cost criterion; AWGN; Additive white noise; Cost function; Delay; Detectors; Gaussian noise; Multiaccess communication; Multiuser detection; Nonlinear filters; Vectors;
Conference_Titel :
Africon Conference in Africa, 2002. IEEE AFRICON. 6th
Print_ISBN :
0-7803-7570-X
DOI :
10.1109/AFRCON.2002.1146868
