A New Phase Coherent Parametric Mixer for PCM-PSK Communications

This paper describes a regenerator for quadriphase phase shift keying (QPSK) signals at the carrier frequency, which is called a "direct regenerator." The direct regenerator proposed here is realized using a tripler and a quadrupler. This regenerator is characterized by the symbols m, rI and s, which denote the intermediate combiner amplitude ratio, the final combiner amplitude ratio and the limiter dynamic range, respectively. Complete regeneration is obtained at rn = n = 1 and s = -.Even if this condition is not satisfied, sufficient regenerative performance for practical use is preserved, when 0.8 < m < 1.25, 0.7 < n < 1.4 and s > 5 de. To verify the operation principle, an experiment was carried out for 1.7 GHz QPSK signals transmitted at 40 Mbits/s. It is shown that this regenerator has satisfactory decision and reshaping capability in dynamic operation. Using this direct regenerator, decision and reshaping of the QPSK signalscan be made without detection. Thus, a repeater can be simplified. compared to a conventional repeater composed of a detector, a baseband regenerator and a modulator. R

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A New Phase Coherent Parametric Mixer for PCM-PSK Communications

Cited by 4 publications

References 0 publications

Phase Regeneration of a BPSK Data Signal Using a Lithium Niobate Phase Modulator

Phase Regeneration of a BPSK Data Signal Using a Lithium Niobate Phase Modulator

An Active Cavity-Backed Slot Antenna Based on a Parametric Amplifier

QPSK Direct Regenerator with a Frequency Tripler and a Quadrupler

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