Bit error probability analysis for FRAMES WCDMA downlink receivers

Author

Latva-aho, Matti

Author_Institution

Center for Wireless Commun., Oulu Univ., Finland

Volume

47

Issue

4

fYear

1998

fDate

11/1/1998 12:00:00 AM

Firstpage

1119

Lastpage

1133

Abstract

The wide-band code-division multiple-access (WCDMA) concept FMA2 developed in the European Future Radio Wide-Band Multiple-Access Systems (FRAMES) project supports variable-data-rate transmission. The data rate can be altered by changing either the spreading factor or by using multiple spreading codes in parallel. In order to facilitate flexible changing of the data rate, variable-length orthogonal Walsh codes are used for channel separation, followed by the scrambling code. Optional short scrambling codes can be used if interference suppression is used. The downlink performance of the FMA2 system using both the conventional RAKE and LMMSE-RAKE receivers is studied. According to the numerical results, the performance of the conventional RAKE receivers is significantly degraded at the highest data rates, whereas the LMMSE-RAKE performs well in those cases also

Keywords

broadband networks; code division multiple access; data communication; error statistics; fading channels; interference suppression; land mobile radio; least mean squares methods; multipath channels; radio access networks; radio links; radio receivers; radiofrequency interference; spread spectrum communication; variable length codes; European Future Radio Wide-Band Multiple-Access Systems; FMA2 system; FRAMES project; LMMSE-RAKE receivers; RAKE receivers; WCDMA downlink receivers; bit error probability analysis; channel separation; downlink performance; frequency-selective Rayleigh channel; interference suppression; multipath fading channels; multiple spreading codes; scrambling code; short scrambling codes; spreading factor; variable data rate transmission; variable-length orthogonal Walsh codes; wide-band code-division multiple-access; wireless land mobile communications; Degradation; Downlink; Error analysis; Error probability; Fading; Interference suppression; Multiaccess communication; Multipath channels; RAKE receivers; Wideband;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.728482

Filename

728482