An all-digital phase-locked loop demodulator based on FPGA

2017 3rd International Conference on Applied Materials and Manufacturing Technology

Gong, X.F.^1 ; Cui, Z.D.^1

School of Mechanical Engineering, University of Science and Technology Beijing, NO.30, College Road, HaiDian District, Beijing, China^1

关键词: All digital phase locked loop;    Carrier detection;    Communication mode;    Digital phase locked loops;    Digital signals;    Output signal;    Reference signals;    Wireless transmissions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/242/1/012096/pdf
DOI  :  10.1088/1757-899X/242/1/012096

来源: IOP

【 摘 要 】

This paper studied the principle of analogue phase-locked loop demodulation and work process of digital phase-locked loop. It is found that the higher the reference signal frequency is, the smaller the duty ratio of the discriminator output signal is. Carrier detection is achieved by using this relationship. The experimental results indicate that the demodulator based on the principle could realize high-quality transmission of digital signals and could be an effective FM communication mode for studying wireless transmission of digital signals.