Time division multiplex access (TDMA) the radio system receiver and of the said time division multiplex access (TDMA) the demodulator for the radio system receiver and of the said time division multiplex access (TDMA) the multiphase demodulation manner null in the radio system

摘要

A method and apparatus for phase-coherently demodulating a multipath-impaired time division multiple access QPSK data timeslot is disclosed. A quadrature separator (105, 107, 111) generates multipath-impaired intermediate signals which, during a predetermined synchronizing sequence for the timeslot, are applied to a pair of synchronizing correlators (303,305) 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.