Signal self-adaptive interception method and system of solar radio observation system

Abstract

The invention discloses a signal self-adaptive interception method and system of a solar radio observation system. The method comprises the following steps: setting an initial interception and a comparison threshold value according to an observation signal when the sun radiates quietly; taking an average value of the observation signals in the solar radio burst time period after maximum absolute value cumulative average processing as a solar energy upper limit value of the current time period; and according to a comparison result of the upper limit value of the solar energy quantity and the comparison threshold, adjusting the digit of the current interception bit to obtain an effective data bit required by the solar radio observation system so as to observe the solar radio. According to the energy difference, observed by a solar radio observation system, between a quiet solar radio state and a solar radio burst state, cut-off changes are controlled by comparing the upper limit value ofsolar energy in the current time period with a threshold value, so that high-precision observation of solar signals with different intensities is realized.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a signal adaptive truncation method and system for a solar radio observation system. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The internal truncation methods of FPGA mainly include direct truncation, compensation truncation and adaptive truncation. Direct truncation means directly retaining the required effective data bits and directly discarding the remaining data bits. This method occupies the least resources and is simple to implement. It is the most commonly used truncation method when FPGA performs digital signal processing; but this method will generate truncation errors. , the data truncation error in digital signal processing is caused by the approximation method after truncation. For positive and negative numbers, the...

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Problems solved by technology

[0008] However, the inventors have found that in the existing truncation methods, direct truncation will produce a large truncation error; the compensation truncation method has a fixed number of truncation bits, so it has limitations in the observable power range; and based on the maximum The adaptive truncation method of absolute value cumulative average and grid comparison can realize the change of the range of observation power, but this method requires the observed signal to have certain characteristics, and different truncations are performed in sections, which is not conducive to the solar radio observation system The calibration of the observation signal value affects the later analysis of the spectrum data; the truncation after the introduction of the Dither signal increases the noise source of the observation signal and increases the difficulty of data processing in the later stage of the solar radio observation system

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