An Energy-Efficient QPSK Demodulation Scheme with Injection-Locking Technique for Green Radio Communication

Author

Fu-Chien Huang ; Bang-Cyuan Wang ; Yi-Lin Tsai ; Tsung-Hsien Lin

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2014

Firstpage

614

Lastpage

617

Abstract

This paper proposes an energy-efficient QPSK demodulator for low-power wireless receivers. It leverages the characteristic of phase-to-amplitude conversion possessed by the injection-locking oscillator. Compared to Costas-loop-based and PLL-based demodulators with high circuit complexity, the injection-locking-based D-QPSK demodulator exploits only one oscillator and one envelope discrimination circuit, which significantly reduce the power dissipation and chip area. Simulation results manifest the effectiveness of injection-locking technique for D-QPSK demodulation.

Keywords

demodulation; demodulators; energy conservation; environmental factors; injection locked oscillators; phase locked loops; quadrature phase shift keying; radio receivers; Costas-loop-based demodulator; D-QPSK demodulation; PLL-based demodulator; chip area reduction; circuit complexity; energy-efficient QPSK demodulation scheme; envelope discrimination circuit; green radio communication; injection-locking oscillator; injection-locking technique; injection-locking-based D-QPSK demodulator; low-power wireless receivers; oscillator; phase-to-amplitude conversion characteristic; power dissipation reduction; Binary phase shift keying; Demodulation; Frequency conversion; Frequency shift keying; Oscillators; Receivers; QPSK signaling; demodulation; envelope detector; injection locking; phase-to-amplitude conversion;

fLanguage

English

Publisher

ieee

Conference_Titel

Internet of Things (iThings), 2014 IEEE International Conference on, and Green Computing and Communications (GreenCom), IEEE and Cyber, Physical and Social Computing(CPSCom), IEEE

Print_ISBN

978-1-4799-5967-9

Type

conf

DOI

10.1109/iThings.2014.105

Filename

7059731