Multiplex communications – Wide area network – Packet switching
Patent
1993-06-30
1995-08-22
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
375296, 3701051, H04B 7212
Patent
active
054447089
ABSTRACT:
A time-division multiplex radio transmission apparatus includes a first frequency divider, a logic processing unit, a digital filter, a modulation unit, a high-frequency amplification unit, and a second frequency divider. The first frequency divider frequency-divides an input clock signal to output a first frequency-divided clock signal. The logic processing unit performs logic processing of an input data signal on the basis of the first frequency-divided clock signal and outputs a burst timing signal. The digital filter is reset in response to the burst timing signal and converts output data from the logic processing unit into a modulation baseband signal on the basis of the input clock signal. The modulation unit modulates an output signal from the digital filter. The high-frequency amplification unit performs burst-waveform processing of an output signal from the modulation unit for each time slot for time-division transmission on the basis of the burst timing signal. The second frequency divider outputs a second frequency-divided clock signal obtained by frequency-dividing the input clock signal to reset the first frequency divider.
REFERENCES:
patent: 4485478 (1984-11-01), Takada
patent: 4972506 (1990-11-01), Uddenfeldt
patent: 5007088 (1991-04-01), Ooi et al.
NEC Corporation
Safourek Benedict V.
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