Method and arrangement for dynamic allocation of multiple carrier-wave channels for multiple access by frequency division of multiplexing
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United States of America Patent
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Oct 21, 1997
Grant Date -
N/A
app pub date -
May 12, 1995
filing date -
Nov 13, 1992
priority date (Note) -
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Abstract
The invention relates to a method and an arrangement for dynamic allocation of multiple carrier wave channels for multiple access by frequency division multiplexing. the invention provides a number of mobile units with the possibility of flexible data speed and continuous transmission. On the fixed side, the number of transmitters and receivers can be minimized by utilizing broadband receivers which serve a number of mobiles. According to the invention, a wider frequency band is divided into a number of subbands with a modulated carrier wave in each subband. To vary the transmission speed, such a number of subbands is allocated as is needed by each user in order to cover the data clock requirement. Broadband transmitters/receivers handle the transmission over the entire accessible band. Oversampling is preferably carried out in the frequency demultiplexing in order to permit the best sampling time to be selected for the different frequency gaps (FIG. 2).
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