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

fYear

2008

fDate

25-27 Aug. 2008

Firstpage

1112

Lastpage

1116

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/CHINACOM.2008.4685221

Filename

4685221