Title :
Code constrained CMA-based multirate multiuser detection
Author :
Xu, Zhengyuan ; Liu, Ping
Author_Institution :
Dept. of Electr. Eng., California Univ., Riverside, CA, USA
Abstract :
In this paper, a constant modulus algorithm (CMA) based multiuser detector is proposed for multirate communications over unknown multipath channels. We impose multiple linear constraints on the detector to guarantee no cancellation of the desired signal, while suppressing the intersymbol interference (ISI) and multiuser interference (MUI). The constraint parameters can be either pre-selected or jointly optimized with the detector. Under certain conditions on the constraints, the proposed algorithm enjoys global convergence.
Keywords :
adaptive equalisers; code division multiple access; convergence of numerical methods; interference suppression; intersymbol interference; multipath channels; multiuser channels; CDMA; CMA; ISI; MUI; adaptive minimum output energy algorithm; code constrained; constant modulus algorithm multiuser detector; global convergence; intersymbol interference suppression; jointly optimized constraint parameters; multiple linear constraints; multirate communications; multiuser interference; pre-selected constraint parameters; signal noncancellation; unknown multipath channels; Additive white noise; Delay; Equalizers; Filtering; Integrated circuit noise; Multiaccess communication; Multiuser detection;
Conference_Titel :
Signals, Systems and Computers, 2001. Conference Record of the Thirty-Fifth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-7147-X
DOI :
10.1109/ACSSC.2001.987730
