DocumentCode :
2594238
Title :
Channel overloading in multiuser and single-user communications
Author :
Sari, Hikmet ; Vanhaverbeke, Frederik ; Moeneclaey, Marc
Author_Institution :
Pacific Broadband Commun., Levallois-Perret, France
Volume :
2
fYear :
2000
fDate :
2000
Firstpage :
1106
Abstract :
This paper gives an overview of a previously introduced channel overloading concept that is applicable to both multiuser communications and single-user communications. We first describe it for multiuser communications using a hybrid multiple access scheme based on a combination of time-division multiple access (TDMA) and code-division multiple access (CDMA). Next, we extend it to full CDMA by defining two sets of orthogonal signal waveforms. Using a binary phase-shift keying (BPSK) modulation, it is shown that this multiple access concept can increase the number of users by 40% with respect to the hard limit of orthogonal waveform multiple access (OWMA) which includes TDMA, orthogonal CDMA (OCDMA), and orthogonal frequency-division multiple access (OFDMA). Then, we apply the same concept to single-user communications to transmit an excess bit rate in addition to the primary data rate. It is shown that an excess data rate of up to 25% can be transmitted at the price of a very small penalty in signal-to-noise ratio (SNR)
Keywords :
channel capacity; code division multiple access; multiuser channels; phase shift keying; time division multiple access; BPSK modulation; CDMA; TDMA; binary phase-shift keying; bit rate; channel overloading; code-division multiple access; multiple access scheme; multiuser communications; orthogonal signal waveforms; signal-to-noise ratio; single-user communications; time-division multiple access; Bandwidth; Binary phase shift keying; Bit rate; Broadband communication; Interference; Multiaccess communication; Phase modulation; Phase shift keying; Signal to noise ratio; Time division multiple access;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2000. PIMRC 2000. The 11th IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-6463-5
Type :
conf
DOI :
10.1109/PIMRC.2000.881591
Filename :
881591
Link To Document :
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