Modified SUGAR/DS: a new CDMA scheme

Author

Elhakeem, Ahmed K. ; Rahman, M. Anisur ; Balasubramanian, Premkumar ; LE-NGOC, THO

Author_Institution

Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada

Volume

10

Issue

4

fYear

1992

fDate

5/1/1992 12:00:00 AM

Firstpage

690

Lastpage

704

Abstract

The authors prove by analysis the possibility of gaining a minimum of 2 dB in signal-to-noise ratio by just, splitting the users to three or more groups and identifying each one by an orthogonal waveform (on top of his short Gold code) in a PSK/DS spread-spectrum network. User signals may arrive in a code-asynchronous fashion at the receiver, however, it is shown that by using the scheme the average code cross-correlation is minimal compared to the classic code division multiple access (CDMA) system. Both the chip-synchronous and asynchronous cases are investigated and the uniform and optimal cases of dividing the users into orthogonal groups are analyzed. The superior bit error and network data throughput results in the different fading and forward error correction environments make the system a strong candidate for competitive domestic applications

Keywords

code division multiple access; correlation theory; mobile radio systems; spread spectrum communication; CDMA; Gold code; PSK; SUGAR/DS; asynchronous case; average code cross-correlation; bit error rate; chip-synchronous case; code division multiple access; code-asynchronous signals; direct sequence system; fading environment; forward error correction; mobile radio; network data throughput; orthogonal waveform; spread-spectrum network; Error correction; Fading; Forward error correction; Gold; Multiaccess communication; Phase shift keying; Signal analysis; Signal to noise ratio; Spread spectrum communication; Throughput;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.136064

Filename

136064