Title :
Blind adaptive multiuser detection using constant modulus algorithm
Author :
Hong, Zhang ; Yi, Wang ; Weiling, Wu
Author_Institution :
BUPT, Beijing, China
Abstract :
The constant modulus algorithm (CMA) for blind multiuser detection is studied in this paper. A general expression for the solutions is given, which shows there are many undesired stationary points. Therefore, methods that guarantee that CMA converges to the desired point are needed. We present approximate conditions that set initialization in the lock region. Simulations show that CMA with variable step size has quicker convergence speed than MOE-RLS, while obtaining better performance.
Keywords :
adaptive signal detection; code division multiple access; convergence of numerical methods; spread spectrum communication; CMA; approximate conditions; blind adaptive multiuser detection; constant modulus algorithm; convergence; initialization; lock region; performance; undesired stationary points; variable step size; Adaptive algorithm; Additive noise; Additive white noise; Algorithm design and analysis; Baseband; Cost function; Genetic expression; Mean square error methods; Multiaccess communication; Multiuser detection;
Conference_Titel :
Communications, 1999. APCC/OECC '99. Fifth Asia-Pacific Conference on ... and Fourth Optoelectronics and Communications Conference
Conference_Location :
Beijing, China
Print_ISBN :
7-5635-0402-8
DOI :
10.1109/APCC.1999.825014
