Open AccessDesign of multi-channel digital correlator in SAMR
Author(s) -
Xiuzhen Ma,
Baoqing Sun,
Jie Liu,
Hui Ren,
Tong Jiang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1971/1/012012
Subject(s) - field programmable gate array , channel (broadcasting) , computer science , signal (programming language) , sampling (signal processing) , electronic engineering , remote sensing , correlation coefficient , computer hardware , engineering , telecommunications , geology , detector , machine learning , programming language
Synthetic Aperture Microwave Radiometer (SAMR) can be carried on the satellite to realize the global large-scale measurement of ocean salinity and soil moisture. As a key component of SAMR, the multi-channel digital correlator has been introduced in this paper from three aspects: an improved method to implement multi-channel correlation, the correlator design and the test results of the correlator. The improved method which effectively reduces the FPGA resource utilization and system complexity is applied to the multi-channel digital correlator system which consists of three signal collectors and one signal processor. The design of multi-channel digital correlator can ensure the real-time signal sampling and processing of 144 ADC channels. The results demonstrate that the measurement accuracy of correlation coefficient can exceed 0.99.