Title :
Adaptive widely linear minimum output energy algorithm for DS-CDMA systems
Author :
Jeon, Jae-Jin ; Andrews, Jeffrey G. ; Sung, Koeng-Mo
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea
Abstract :
A novel blind widely linear (WL) minimum output energy (MOE) algorithm is proposed for the CDMA receiver. Whereas the conventional WL algorithms are only applicable to real-valued modulation, the proposed receiver is applicable to complex-valued modulation. The blind WL-MOE filter is analyzed, and the convergence properties of an adaptive implementation are derived. Simulation results confirm that the proposed algorithm has higher steady-state SINR and faster convergence speed than the conventional MOE algorithm but cannot outperform the conventional WL-MOE due to severer constraints.
Keywords :
adaptive filters; adaptive modulation; code division multiple access; convergence of numerical methods; gradient methods; radio receivers; spread spectrum communication; stochastic processes; DS-CDMA receiver; adaptive WL-MOE filter; complex-valued modulation; convergence property; stochastic gradient method; widely linear minimum output energy algorithm; Adaptive filters; Binary phase shift keying; Convergence; Detectors; Multiaccess communication; Multiple access interference; Multiuser detection; Nonlinear filters; Signal processing; Signal processing algorithms;
Conference_Titel :
Communications, 2005. ICC 2005. 2005 IEEE International Conference on
Print_ISBN :
0-7803-8938-7
DOI :
10.1109/ICC.2005.1494711
