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Digital cellular system with linear modulation

By: Kondoh, N.; Ono, S.; Shimazaki, Y.;

1989 / IEEE

Description

This item was taken from the IEEE Periodical ' Digital cellular system with linear modulation ' The authors describe a digital cellular system with linear modulation. They discuss two kinds of modulation schemes-QPSK (quadrative phase-shift keying) and pi /4 shift QPSK, and two kinds of detection schemes-coherent detection and limiter-discriminator detection. The features of these modulation/detection schemes are clarified. From the collective point of view, the pi /4 shift QPSK/limiter-discriminator detection is judged to be the most advantageous. Next, the authors show examples of the radio link design for a digital cellular system with linear modulation. The system could be constructed at a transmission power of 100-200 mW. Finally, the breadboard equipment configuration and the experimental results are shown.<>