Further results on channel overloading using combined TDMA/OCDMA with iterative interference cancellation

Author

Nadal, Florence ; Berthet, Antoine O. ; Sari, Hikmet

Author_Institution

SUPELEC, Gif-sur-Yvette, France

Volume

4

fYear

2004

fDate

5-8 Sept. 2004

Firstpage

2463

Abstract

We present some new results on a recently introduced multiple access technique which accommodates more than TV users on a channel whose bandwidth is N times the bandwidth of the individual user signals. For K = N + M users, the technique makes use of two sets of orthogonal signal waveforms, one for the first N users and one for the M additional users. Considering a combination of time-division multiple access (TDMA) and orthogonal code-division multiple access (OCDMA), this multiple access scheme is evaluated using quaternary phase-shift keying (QPSK) and 16-state quadrature amplitude (16-QAM) modulations. When used in conjunction with soft iterative interference cancellation (IC), the technique offers substantial overloads.

Keywords

code division multiple access; interference suppression; phase shift keying; quadrature amplitude modulation; time division multiple access; OCDMA; TDMA; channel overloading; interference cancellation; multiple access technique; orthogonal code-division multiple access; orthogonal signal waveform; quadrature amplitude modulation; quaternary phase-shift keying; time-division multiple access; Amplitude modulation; Bandwidth; Interference cancellation; Modulation coding; Multiaccess communication; Phase modulation; Phase shift keying; Quadrature phase shift keying; TV; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on

Print_ISBN

0-7803-8523-3

Type

conf

DOI

10.1109/PIMRC.2004.1368763

Filename

1368763