BPSK to ASK Signal Conversion Using Injection-Locked Oscillators-Part I: Theory

This paper presents a new method and circuit for the conversion of binary phase-shift keying (BPSK) signals into amplitude shift keying signals. The basic principles of the conversion method are the superharmonic injection and locking of oscillator circuits, and interference phenomena. The first one...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2005-12, Vol.53 (12), p.3757-3766
Main Authors: Lopez-Villegas, J.M., SieiroCordoba, J.J.
Format: Article
Language:English
Subjects:
Amplitude shift keying
Amplitude shift keying (ASK)
Amplitudes
Applied sciences
bifurcation
Binary phase shift keying
Circuit properties
Circuits
Conversion
Converters
Demodulation
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Envelope detectors
Exact sciences and technology
Injection locked oscillators
injection-locked oscillator (ILO)
Interference
Keying
Oscillators
Oscillators, resonators, synthetizers
Phase convertors
Phase modulation
Phase shift keying
phase shift keyings (PSKs)
Time factors
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Description
Summary:This paper presents a new method and circuit for the conversion of binary phase-shift keying (BPSK) signals into amplitude shift keying signals. The basic principles of the conversion method are the superharmonic injection and locking of oscillator circuits, and interference phenomena. The first one is used to synchronize the oscillators, while the second is used to generate an amplitude interference pattern that reproduces the original phase modulation. When combined with an envelope detector, the proposed converter circuit allows the coherent demodulation of BPSK signals without need of any explicit carrier recovery system. The time response of the converter circuit to phase changes of the input signal, as well as the conversion limits, are discussed in detail.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2005.859875