Phase-coherent TDMA quadrature receiver for multipath fading cha

Details Phase-coherent TDMA quadrature receiver for multipath fading cha Phase-coherent TDMA quadrature receiver for multipath fading cha

1987-12-04

1989-05-09

Griffith, Robert L.

Pulse or digital communications

Repeaters

Testing

375 96, 329112, H04L 2722

Patent

active

048295434

ABSTRACT:
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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