Research and design of all-electronic phase-sensitive receiver based on dual-channel

DIAO Yanmei; CHEN Meiling; YI Liang

doi:10.20193/j.ices2097-4191.2024.0055

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Integrated Circuits and Embedded Systems ›› 2025, Vol. 25 ›› Issue (1) : 67-73. DOI: 10.20193/j.ices2097-4191.2024.0055

Research Paper

Research and design of all-electronic phase-sensitive receiver based on dual-channel

DIAO Yanmei ¹^,^* ,
CHEN Meiling ¹ ,
YI Liang ²

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Abstract

In order to improve the measurement accuracy and resolution of the phase-sensitive receiver,an all-electronic phase-sensitive receiver based on the all-phase Fast Fourier Transform (apFFT) algorithm is designed. The hardware is a two-take-two dual-channel structure, and the process is synchronized by two machines, and the calculation results are output after comparison. The DDS generator is used to build a test platform for simulating and verifying the function of the scheme, and the on-site track circuit combination frame is connected to the field test. The experimental results show that the design can accurately detect the occupancy status of the train in the track section, distinguish the random noise and harmonic signal on the rail. It has strong anti-interference capabilities, with a phase difference measurement error of no more than 0.3°. This scheme is an electronic improvement of the existing microelectronic phase-sensitive track circuit receiver, featuring a simple circuit. The phase difference calculation is completely completed by software, resulting in the high reliability. It can be used for the coded or non-coded sections of the 25 Hz phase-sensitive track circuits powered by 50 Hz alternating current traction.

Key words

two-take-two dual-channel structure / apFFT / 25 Hz phase-sensitive track circuit / phase difference

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DIAO Yanmei , CHEN Meiling , YI Liang. Research and design of all-electronic phase-sensitive receiver based on dual-channel[J]. Integrated Circuits and Embedded Systems. 2025, 25(1): 67-73 https://doi.org/10.20193/j.ices2097-4191.2024.0055

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