Optimal signature sets for oversaturated quasi-scalable direct-sequence spread-spectrum systems

Author

Vanhaverbeke, Frederik ; Moeneclaey, Marc

Author_Institution

Telecommun. & Inf. Process. Dept., Univ. of Gent, Belgium

Volume

51

Issue

3

fYear

2005

fDate

3/1/2005 12:00:00 AM

Firstpage

1136

Lastpage

1139

Abstract

Signature sets that maximize the sum capacity of an oversaturated code-division multiple-access (CDMA) system are derived, under the constraint that the signature sets have to be quasi-scalable. It turns out that the optimal signature set is composed of orthogonal signature sets, with at most one incomplete orthogonal set. As compared to the Gaussian multiple-access channel (GMAC), the loss in spectral efficiency for this multiple-orthogonal CDMA (OCDMA) system remains very low.

Keywords

channel capacity; code division multiple access; m-sequences; spread spectrum communication; CDMA; OCDMA system; code-division multiple-access system; direct-sequence spread-spectrum systems; multiple-orthogonal CDMA; oversaturated channels; quasiscalable; signature sets; spectral efficiency; sum capacity; Associate members; Australia; Base stations; Channel capacity; Control systems; Information processing; Multiaccess communication; Scalability; Spread spectrum communication; Upper bound; Code-division multiple access (CDMA); multiple access; oversaturated channels; sum capacity;

fLanguage

English

Journal_Title

Information Theory, IEEE Transactions on

Publisher

ieee

ISSN

0018-9448

Type

jour

DOI

10.1109/TIT.2004.842737

Filename

1397945