Apparatus and method for symbol alignment in a multi-point OFDM/DMT digital communications system
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United States of America Patent
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Issued Date -
Feb 16, 2006
app pub date -
Aug 11, 2005
filing date -
Aug 22, 1996
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A multi-point communications system that is set forth herein. The communication system comprises a head end unit disposed at a primary site and a plurality of receivers disposed at remote sites. The head end unit includes a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are transmitted in periodically occurring formatted symbol frames. The cyclic prefix includes a predetermined periodic signal superimposed thereon. The receivers receive the OFDM/DMT symbols over a subset of the predetermined number of bins from the transmission medium and use the superimposed signals to attain symbol alignment.
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