Multi-channel digital correlator in comprehensive aperture microwave remote sensing radiometer
A digital correlator and synthetic aperture technology, applied in the field of microwave remote sensing, can solve the problems of large resource consumption and achieve the effects of improving system performance, increasing the number of correlation channels, and reducing complexity
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[0021] The present invention will be described in detail below in conjunction with the drawings.
[0022] The multi-channel digital correlator in the synthetic aperture microwave remote sensing radiometer of the present invention, wherein the multi-channel digital correlator is implemented based on FPGA, which is mainly composed of a gate clock generation unit, a delay distribution unit, multiple secondary correlation units and a data aggregation unit in sequence Connection composition, system block diagram such as figure 1 Shown.
[0023] The gate clock generation unit, under the control of the low-frequency clock Wr_clk on the radiometer, writes the signal collected by the ADC on the radiometer into the full mark hysteresis FIFO on the gate clock generation unit, and reads when the FIFO is not empty; that is, when the FIFO is When the data is more than 2 / 3 of the depth, the FIFO full flag Prog_Full signal is pulled high, when the data in the FIFO is less than 1 / 3 of the depth, th...
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