Title :
Performance of channel estimation assisted linear multiuser receivers for downlink CDMA systems with long spreading codes
Author :
Xu, Zhengyuan ; Liu, Ping ; Yu, Nenghai
Author_Institution :
Dept. of Electr. Eng., California Univ., Riverside, CA, USA
Abstract :
With availability of spatial/temporal diversity in the downlink of long code CDMA systems, subspace technique has been shown to be able to estimate channel parameters. Based on the estimated channel, we construct three typical linear receivers as ZF, MMSE and RAKE receivers. Due to channel estimation error, those receivers show perturbed performance compared with their optimal counterparts. Their statistical performance is thus analyzed by applying perturbation theory. Those analyses are well supported by numerical results.
Keywords :
channel estimation; code division multiple access; codes; least mean squares methods; multiuser detection; perturbation theory; radio receivers; statistical analysis; MMSE receiver; RAKE receiver; ZF receiver; channel estimation; code division multiple access; downlink CDMA system; linear multiuser receiver; linear receiver; long spreading code; minimum mean squared error; perturbation theory; spatial-temporal diversity; statistical performance; subspace technique; Channel estimation; Covariance matrix; Downlink; Equalizers; Fading; Multiaccess communication; Multipath channels; Parameter estimation; Performance analysis; RAKE receivers;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on
Print_ISBN :
0-7803-7822-9
DOI :
10.1109/PIMRC.2003.1259297
