Orthogonal variable rate spreading sequences with improved correlation properties for wireless CDMA cellular networks

Author

Godlewski, Philippe ; Jabbari, Bijan

Author_Institution

ENST, Paris, France

Volume

1

fYear

1999

fDate

36342

Firstpage

433

Abstract

This paper discusses a technique for orthogonal multiplexing and scrambling of signals with variable spreading factor in a direct sequence code division multiple access (DS-CDMA) system. The technique extends Gold sequences and yields a bounded autocorrelation and cross correlation for small delays, mostly in the range of interest for microcell multipath channels. Furthermore variable spreading factor multiplexing can readily be implemented similar to those for Hadamard multiplexing

Keywords

code division multiple access; correlation methods; microcellular radio; multipath channels; multiplexing; spread spectrum communication; DS-CDMA; Gold sequences; autocorrelation; correlation properties; cross correlation; direct sequence code division multiple access; microcell multipath channel; orthogonal multiplexing; orthogonal variable rate spreading sequences; scrambling; small delays; variable spreading factor; variable spreading factor multiplexing; wireless CDMA cellular networks; Downlink; Error correction; Error correction codes; Frequency division multiplexing; Gold; Interference constraints; Land mobile radio cellular systems; Multiaccess communication; OFDM; Time division multiplexing;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999 IEEE 49th

Conference_Location

Houston, TX

ISSN

1090-3038

Print_ISBN

0-7803-5565-2

Type

conf

DOI

10.1109/VETEC.1999.778092

Filename

778092