RAKE decorrelation as an alternative to rapid power control in DS-CDMA mobile radio

Author

Wijayasuriya, S.S.H. ; McGeehan, J.P. ; Norton, G.H.

Author_Institution

Centre for Commun. Res., Bristol Univ., UK

fYear

1993

fDate

18-20 May 1993

Firstpage

368

Lastpage

371

Abstract

The sliding window decorrelating algorithm (SLWA) for asynchronous multi-user DS-CDMA (direct sequence code division multiple access) systems has previously been proposed. In mobile radio networks, the feasibility of overcoming the near-far problem using power control strategies is questionable at practical vehicle speeds. An alternative to rapid power control is proposed which incorporates both the RAKE diversity reception concept and the SLWA. Decorrelation is thus achieved between individual users and their significant multi-paths. A mathematical model is presented for the receiver in conjunction with simulation and numerical results which show capacity enhancements over the conventional linear correlation receiver (CLCR) and lead to ideas on a positioning strategy for decorrelating solutions in DS-CDMA mobile radio

Keywords

channel capacity; code division multiple access; diversity reception; land mobile radio; multipath channels; pseudonoise codes; spread spectrum communication; DS-CDMA mobile radio; RAKE diversity reception; capacity enhancements; direct sequence code division multiple access; feasibility; mathematical model; near-far problem; positioning strategy; receiver; sliding window decorrelating algorithm; Decorrelation; Direct-sequence code-division multiple access; Diversity reception; Land mobile radio; Mathematical model; Multiaccess communication; Numerical simulation; Power control; RAKE receivers; Vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1993., 43rd IEEE

Conference_Location

Secaucus, NJ

ISSN

1090-3038

Print_ISBN

0-7803-1267-8

Type

conf

DOI

10.1109/VETEC.1993.507488

Filename

507488