Title :
Performance analysis of RLS constant modulus algorithm in DS-CDMA system
Author :
Wang, Xin ; Zou, Xuelan ; Li, Guangwen
Author_Institution :
Coll. of Telecommun. & Inf. Eng., Nanjing Univ. of Posts & Telecommun., Nanjing
Abstract :
In this research, we analyze the performance of recursive least squares constant modulus equalization in direct spread code division multiple access system. The expressions for excess mean square error (EMSE) are derived by feedback analysis in both the stationary and non-stationary channels. With EMSE, the relationship between the stochastic gradient descent and the recursive least square in CDMA is obtained. Simulation results demonstrate it.
Keywords :
code division multiple access; gradient methods; least squares approximations; mean square error methods; spread spectrum communication; telecommunication channels; DS-CDMA system; direct spread code division multiple access system; excess mean square error; feedback analysis; nonstationary channel; recursive least squares constant modulus equalization; stochastic gradient descent; Convergence; Covariance matrix; Educational institutions; Feedback; Least squares methods; Mean square error methods; Multiaccess communication; Performance analysis; Resonance light scattering; Steady-state; EMSE; multiuser detector; tracking ability;
Conference_Titel :
Communications and Networking in China, 2008. ChinaCom 2008. Third International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4244-2373-6
Electronic_ISBN :
978-1-4244-2374-3
DOI :
10.1109/CHINACOM.2008.4685221
