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