Title :
Uplink channel estimation for IMT-DS system
Author :
Sheikh, A.U.H. ; Faisal, S. ; Shah, Aamer
Author_Institution :
Dept. of Electr. Eng., King Fahd Univ. of Pet. & Miner., Dhahran
fDate :
6/23/1905 12:00:00 AM
Abstract :
The IMT-DS system is one of the approved 3G radio interface standards which employ RAKE receivers to exploit multipath diversity. This paper discusses a new dimension in DS-CDMA channel estimation, i.e., chip-level adaptive channel estimation. A novel despreader-respreader based channel estimator (DRCE) is proposed to obtain uplink (UL) channel estimates at chip-level which resolves the deficiencies of conventional methods that work at symbol level. The DRCE employs an adaptive filter whose weights are adapted by using an LMS algorithm. The performance of the RAKE receiver with DRCE for an IMT-DS system is evaluated in terms of BER by simulations for pedestrian and vehicular channels
Keywords :
adaptive estimation; adaptive filters; cellular radio; code division multiple access; diversity reception; error statistics; least mean squares methods; multipath channels; parameter estimation; radio receivers; spread spectrum communication; 3G radio interface standard; BER; DS-CDMA; IMT-DS system; RAKE receivers; adaptive estimation; adaptive filter; despreader-respreader channel estimator; multipath diversity; pedestrian channels; uplink channel estimation; vehicular channels; Adaptive filters; Channel estimation; Fading; Least squares approximation; Mathematical model; Minerals; Multiaccess communication; Multipath channels; Petroleum; Radio transmitters;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.957188
