Title :
Blind adaptive multiuser detection based on a constrained CM criterion in CDMA systems
Author :
Pan, Weiqiang ; Chen, Fangjiong ; Xiong, Shangkun ; Wei, Gang
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou
Abstract :
Constant modulus (CM) is an important criterion in multiuser detection. Since the CM cost functions are non-convex and local minima exist. It is necessary to confine the searching space. In the paper we study the constraints for CM-based multiuser detection. A new constraint based on the MMSE criterion is proposed. Simulation results show the proposed algorithm is superior to some existing linearly constrained CM based algorithms
Keywords :
adaptive signal detection; code division multiple access; least mean squares methods; multiuser detection; CDMA system; MMSE criterion; blind adaptive multiuser detection; code division multiple access; constant modulus; minimum mean square error; Adaptive algorithm; Constraint optimization; Cost function; Fading; Intersymbol interference; Multiaccess communication; Multiple access interference; Multiuser detection; Space technology; Statistics;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2005. MAPE 2005. IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
0-7803-9128-4
DOI :
10.1109/MAPE.2005.1618186
