| 摘要 |
<p>A method of synchronizing a baseband demodulator in a radio receiver, which may be stationary or mobile. The demodulator is a phase-shift demodulator and detects a baseband signal incoming from a sampling A/D-converter in the receiver. The baseband signal is transmitted from a radio transmitter in the form of bursts, in time slots in accordance with the TDMA-principle. One time slot, in addition to the data word, also includes in a known manner a synchronization part which has a given, fixed bit pattern. Prior to demodulation in the baseband demodulator, differential correlation of the received baseband signal is effected with the known synchronization pattern, wherein a time-dependent correlation function is obtained. The absolute magnitude of the maximum value is calculated and the corresponding time position for this maximum value is detected, which denotes the time position of the synchronization part of the received baseband signal.</p> |
