Phase-coherent tdma quadrature receiver for multipath fading...

H - Electricity – 04 – B

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H04B 7/212 (2006.01) H04B 7/26 (2006.01) H04L 7/04 (2006.01)

Patent

CA 1291280

PHASE-COHERENT TDMA QUADRATURE RECEIVER FOR MULTIPATH FADING CHANNELS Abstract of the Invention A method and apparatus for phase-coherently demodulating a multipath-impaired time division multiple access QPSK data timeslot is disclosed. A quadrature separator generates multipath-impaired intermediate signals which, during a predetermined synchronizing sequence for the timeslot, are applied to a pair of synchronizing correlators to generate quadrature multipath profiles. These profiles then are used to modify subsequently received QPSK timeslot signals at the separator outputs to coherently construct multipath compensated I and Q channel data.

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