Digital radiocommunication terminal

Details Digital radiocommunication terminal Digital radiocommunication terminal

1994-12-15

1997-12-09

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

375280, 375332, 329306, 329307, 455 86, 455315, 455316, H04L 2710, H04L 2718

Patent

active

056967926

ABSTRACT:
The number of oscillators required to construct a digital radiocommunication terminal can be reduced and a circuit used for the digital radiocommunication terminal can be reduced in size. For this purpose, the digital radiocommunication terminal for effecting information transmission using an N (integer)-phase-shift-keyed signal (identification symbol number N=4 upon .pi./4 shifted QPSK modulation), is constructed such that an oscillation frequency generated from a reference oscillator employed with a frequency synthesizer is selected to have a common multiple of a second intermediate frequency and an identification symbol phase N and is supplied to a detector for outputting received data therefrom.

REFERENCES:
patent: 5307378 (1994-04-01), Norimatsu
patent: 5388125 (1995-02-01), Toda et al.
patent: 5519885 (1996-05-01), Vaisamen

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