Tdma radio system employing bpsk synchronization for qpsk...

Details Tdma radio system employing bpsk synchronization for qpsk... Tdma radio system employing bpsk synchronization for qpsk...

H - Electricity

04

B

363/17

H04B 7/212 (2006.01) H04B 7/26 (2006.01) H04L 27/22 (2006.01)

Patent

CA 1294073

CE00027R TDMA RADIO SYSTEM EMPLYING BPSK SYNCHRONIZATION FOR QPSK SIGNALS SUBJECT TO RANDOM PHASE VARIATION AND MULTIPATH FADING Abstract of the Invention A time division multiple access (TDMA) radio system conveying a quadrature phase shift keying (QPSK) modulated data signal is disclosed. In order to overcome multipath distortion and phase variation introduced by the radio channel, a synchronizing portion of a TDMA timeslot is transmitted in only one veotor of the QPSK modulation. The system utilizes the one vector synchronizing portion to develop a channel profile estimate which is applies to the received message portion of the QPSK data signal to compensate for the multipath distortion and phase variation during one TDMA timeslot.

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