Frequency division multiplex guardband communication system for sending information over the guardbands
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United States of America Patent
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Apr 2, 1991
Grant Date -
N/A
app pub date -
Nov 16, 1989
filing date -
Nov 16, 1989
priority date (Note) -
Expired
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Abstract
A frequency division multiplex guardband communication system is provided which increases the communication capability of conventional FDM systems with negligible effect on overall system performance. The additional capacity is achieved through the use of guardbands which lie between the information bands of the FDM. To avoid interfering with recovery of the FDM information, the amount of new signal energy added to the individual guardbands is well below the guardband noise level.
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