QPSK demodulator

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United States of America Patent

PATENT NO 9860104
APP PUB NO 20170317871A1
SERIAL NO

15272754

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Abstract

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A novel quadrature phase-shift keying (QPSK) demodulator, called the bowknot quadrature phase-shift keying (BQPSK) demodulator, is disclosed. The BQPSK demodulator uses a delay circuit to delay a BQPSK signal and mixes the delayed BQPSK signal with the undelayed BQPSK signal to output an I-channel data signal and a Q-channel data signal. The BQPSK demodulator further uses a phase rotation circuit to demodulate the orthogonal data signals and obtain a recovery clock signal. The BQPSK demodulator neither uses an A/D converter nor uses a quadrature oscillator, featuring high data rate, low power consumption, simple architecture and superior reliability. The BQPSK demodulator can be realized by digital circuits and analog circuits.

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Patent Owner(s)

  • NATIONAL CHIAO TUNG UNIVERSITY

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hong, Hao-Chiao Hsinchu, TW 9 44
Lo, Chi-Yi Hsinchu, TW 5 3

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