Method and apparatus for using frequency diversity to separate wireless communication signals
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United States of America Patent
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Issued Date -
Oct 17, 2002
app pub date -
Dec 27, 2001
filing date -
Jul 2, 1999
priority date (Note) -
Abandoned
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Abstract
Spatial processing of wideband and multicarrier signals in a multipath environment is achieved by exploiting frequency diversity. The amplitude-versus-frequency profile of received signals is affected by multipath fading. Spatial separation of the transmitters results in transmitted signals undergoing different fades. Providing the transmitted signals with unique amplitude-versus-frequency profiles ensures that received signals have different profiles, even when multipath fading is negligible. A diversity receiver separates the received signals into components and spatially demultiplexes the interfering signals in each of the frequency components using cancellation, constellation, or correlation processes.
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