Method for frequency division duplex communications
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United States of America Patent
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Jul 21, 2015
Grant Date -
Aug 7, 2014
app pub date -
Apr 7, 2014
filing date -
Feb 6, 1997
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Abstract
The high quality PCS communications are enabled in environments where adjacent PCS service bands operate with out-of-band harmonics that would otherwise interfere with the system's operation. The highly bandwidth-efficient communications method combines a form of time division duplex (TDD), frequency division duplex (FDD), time division multiple access (TDMA), orthogonal frequency division multiplexing (OFDM), spatial diversity, and polarization diversity in various unique combinations. The method provides excellent fade resistance. The method enables changing a user's available bandwidth on demand by assigning additional TDMA slots during the user's session.
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