VDSL transmission employing multi-code multi carrier CDMA modulation
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United States of America Patent
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Apr 15, 2008
Grant Date -
Jan 6, 2005
app pub date -
Jul 30, 2004
filing date -
Aug 21, 2003
priority date (Note) -
Expired
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Abstract
An improved transmission method for high-rate digital communication on unshielded twisted copper pairs for Very-High Speed Digital Subscriber Loop (VDSL) modems. The new modulation scheme is a Multi Code Multi Carrier Code Division Multiple Access, hereafter named MC.sup.2 CDMA. The system takes advantage from both the CDMA modulation and the Multi-Carrier transmission and, in addition, the channel throughput is increased adopting a multi-code approach. The novel scheme encompasses transmitter, channel and receiver loading.
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