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2015•Unpublished venueRequires access

Research on QPSK Carrier Synchronization Algorithm Based on Software Defined Radio

Ziheng Yang, Ling-Ling Yu, Qun Ding, Shi-Jun Kang, Meng-Jiang Han

Open publisher page 4 citations

Abstract

Carrier synchronization is one of the key technologies of digital wireless communication. As a kind of four phase shift keying modulation method, QPSK has strong anti-interference ability of the suppressed carrier, which is widely used in digital wireless communications. On this basis, this article describes a Costas-loop coherent carrier extraction algorithm based on Arctangent phase detection. It designs a digital intermediate frequency receiver system based on software radio thought. The system consists of data acquisition module, digital down converter (DDC) and digital demodulation module. At last, it makes simulation verification by Matlab for QPSK demodulation. Simulation results show that the simulation model could correctly implement BPSK signal demodulation.

About this research paper

What this paper is about

Carrier synchronization is one of the key technologies of digital wireless communication. As a kind of four phase shift keying modulation method, QPSK has strong anti-interference ability of the suppressed carrier, which is widely used in digital wireless communications. On this basis, this article describes a Costas-loop coherent carrier extraction algorithm based on Arctangent phase detection. It designs a digital intermediate frequency receiver system based on software radio thought. The system consists of data acquisition module, digital down converter (DDC) and digital demodulation module. At last, it makes simulation verification by Matlab for QPSK demodulation. Simulation results show that the simulation model could correctly implement BPSK signal demodulation.

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OpenAlex reports 4 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

Carrier synchronization is one of the key technologies of digital wireless communication. As a kind of four phase shift keying modulation method, QPSK has strong anti-interference ability of the suppressed carrier, which is widely used in digital wireless communications. On this basis, this article describes a Costas-loop coherent carrier extraction algorithm based on Arctangent phase detection. It designs a digital intermediate frequency receiver system based on software radio thought. The system consists of data acquisition module, digital down converter (DDC) and digital demodulation module. At last, it makes simulation verification by Matlab for QPSK demodulation. Simulation results show that the simulation model could correctly implement BPSK signal demodulation.

Key concepts: Demodulation, Phase-shift keying, Software-defined radio, Computer science, Electronic engineering, Carrier recovery, Synchronization (alternating current), Digital radio

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