Method and apparatus for achieving frequency diversity by use of multiple images
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United States of America Patent
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Sep 24, 2002
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app pub date -
Apr 7, 1999
filing date -
Apr 7, 1999
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Abstract
A physical layer device (PHY) device in a home LAN employs discrete multitone technology (DMT). The DMT system enables usage of existing residential wiring, which typically is telephone system grade twisted copper pair. The PHY device comprises a spectral image selection circuit to increase frequency diversity by examining all the images captured by a filter and restoring the transmitted signal based upon an image that may not be associated with the carrier frequency but its harmonics. Alternatively, the PHY device adjusts the sampling rate of its digital to analog convertor and accordingly filters to achieve desired grouping of spectral images.
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