Design and implementation of a five-channel high-precision phase difference measurement system

Hongzhi Ma; Shumin Tu; Wei Huang; Youwen Zhang

doi:10.1117/12.3033662

13 June 2024 Design and implementation of a five-channel high-precision phase difference measurement system

Hongzhi Ma, Shumin Tu, Wei Huang, Youwen Zhang

Proceedings Volume 13180, International Conference on Image, Signal Processing, and Pattern Recognition (ISPP 2024); 131805A (2024) https://doi.org/10.1117/12.3033662
Event: International Conference on Image, Signal Processing, and Pattern Recognition (ISPP 2024), 2024, Guangzhou, China

Abstract

In the multi-channel receiving system, the consistency of the phase and amplitude of the hardware circuit has a great impact on the signal processing results at the back end. Therefore, it is very important to ensure the consistency of the phase and amplitude between multiple channels. The high-precision measurement of the phase and amplitude of each channel is the premise of adjusting the circuit parameters. In order to provide a reliable and accurate parameter adjustment basis for the phase and amplitude adjustment of multiple channels, a convenient, effective and high-precision five-channel phase and amplitude consistency measurement scheme is presented in this paper. Firstly, the hardware circuit of the five-channel receiving system is designed, including signal preprocessing module, phase modulation module, A/D sampling module, FPGA control module, network port data transmission module, etc. Secondly, based on the designed hardware circuit, the FPGA program of 5-channel high-speed data acquisition and transmission is programmed. With the help of the data of the designed measurement scheme, by adjusting the parameters of the all-pass filter of the phase modulation circuit, the mean phase difference between the five channels is controlled within 0.1°, and the amplitude consistency is controlled within ±0.1dB.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Hongzhi Ma, Shumin Tu, Wei Huang, and Youwen Zhang "Design and implementation of a five-channel high-precision phase difference measurement system", Proc. SPIE 13180, International Conference on Image, Signal Processing, and Pattern Recognition (ISPP 2024), 131805A (13 June 2024); https://doi.org/10.1117/12.3033662

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KEYWORDS

Phase measurement

Field programmable gate arrays

Analog electronics

Signal processing

Phase shift keying

Design

Linear filtering

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