PCM modem adaptation system utilizing a silence period
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 18, 2002
Grant Date -
N/A
app pub date -
Feb 3, 2000
filing date -
Feb 3, 2000
priority date (Note) -
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Abstract
In a full duplex PCM modem system, a method and apparatus is provided for robust measuring of the communications channel in which the digital modem's transmitter is silenced during generation of training signals by the analog modem, with the silencing of the digital modem's transmitter eliminating problems associated with echo during channel measurement at the digital modem. The above method thus eliminates echo during channel estimation and removes any dependencies on the performance of the echo canceller normally used.
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