Title :
Equalization in CDMA downlink based on channel estimation
Author :
Weijun, Sun ; Daoben, Li
Author_Institution :
Beijing Univ. of Posts & Telecommun., China
Abstract :
RAKE receiver deteriorates as MAI (multiaccess interference) becomes serious in CDMA downlink channel. Orthogonality of spreading sequences can be restored through equalization on chip levels. In this paper, ZF (zero forcing) and MMSE (minimum mean square error) equalization on chip levels are studied and simulated. Moreover, an adaptive algorithm and simplified equalizer architecture are proposed to lower computation complexity.
Keywords :
adaptive equalisers; channel estimation; code division multiple access; computational complexity; least mean squares methods; mobile radio; radio receivers; radiofrequency interference; CDMA downlink channel; MMSE; RAKE receiver; adaptive algorithm; channel estimation; chip levels; computation complexity; equalizer architecture; minimum mean square error; multiaccess interference; spreading sequences; zero forcing; Adaptive algorithm; Channel estimation; Computational modeling; Downlink; Equalizers; Fading; Mean square error methods; Multiaccess communication; Multipath channels; Multiple access interference;
Conference_Titel :
Communication Technology Proceedings, 2003. ICCT 2003. International Conference on
Print_ISBN :
7-5635-0686-1
DOI :
10.1109/ICCT.2003.1209883
