On the capacity of the asynchronous T-user M-frequency noiseless multiple-access channel without intensity information

We discuss an achievable rate region for the asynchronous T-user M-frequency multiple-access channel without intensity information. The problem is formulated in terms of frequencies, but the results are also applicable to pulse position modulation (PPM) schemes. It is shown that the achievable sum r...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on information theory 1996-11, Vol.42 (6), p.2235-2238
Main Authors: Han Vinck, A.J., Keuning, K.J.
Format: Article
Language:English
Subjects:
Asynchronous transfer mode
Channel capacity
Digital communication
Frequency shift keying
H infinity control
Information technology
Interference
Mathematics
Multiplexers
Pulse modulation
Signal processing
Time division multiple access
Viterbi algorithm
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We discuss an achievable rate region for the asynchronous T-user M-frequency multiple-access channel without intensity information. The problem is formulated in terms of frequencies, but the results are also applicable to pulse position modulation (PPM) schemes. It is shown that the achievable sum rate for T users reduces from (M-1) bits per channel use in the synchronous multiple-access situation to at least (M-1)/spl middot/ln (2) bits per channel use in the asynchronous situation. In particular, the result shows that for instance, for multitone M-ary frequency shift keying multiple access, in asynchronous operation, multiple user interference reduces the capacity maximally by a factor ln(2)=0.693 relative to the ideal TDMA system.
ISSN:0018-9448
1557-9654
DOI:10.1109/18.556613