Adaptive radio frequency interference elimination method for radio astronomical signals

Abstract

The invention provides an adaptive radio frequency interference elimination method for radio astronomical signals. The method comprises the following steps of acquiring the reference data and observation data, and performing channel division on the reference data and the observation data; initializing a gain function and the output of an adaptive filter; calculating the average power of each datablock of the reference data and each data block of the observation data; calculating the standardized parameters; calculating a cross-correlation function of the output of the adaptive filter and thereference data; obtaining a cross-correlation average value; calculating the gain function of the adaptive filter; using the gain function to modify the amplitude and phase of the reference data, andobtaining the output of the adaptive filter. According to the method, ta cross-correlator is designed according to the correlation characteristics between the reference data and the observation data,the automatic adjustment of the gain function of the adaptive filter is flexibly realized according to the reference data, the radio frequency interference in the astronomical signals is effectively eliminated, the operation efficiency is high, the lossless recovery of the astronomical signals is realized, the problem of more complex radio frequency interference is solved, and the anti-interference performance is very high.

Description

technical field [0001] The invention belongs to the field of radio astronomy, and in particular relates to an adaptive radio frequency interference elimination method for radio astronomy signals, which is suitable for interference processing of astronomical signals such as pulsars and fast radio bursts and related scientific research. Background technique [0002] With the rapid development of information technology and manufacturing technology, radio astronomy equipment has been continuously upgraded or replaced to make it have better observation performance, including improving the time and frequency resolution of data recording and obtaining higher receiving and recording bandwidth, etc. . However, the contradiction is that the International Telecommunication Union only allocates very limited spectrum resources for radio astronomy, and the result is that radio observation equipment is inevitably affected by the increasing non-astronomical signals, which mainly come from h...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide an adaptive radio frequency interference elimination method for radio astronomy signals to solve the problem of decreased sensitivity of observation equipment and signal-to-noise ratio, and to improve the efficiency of observation and search of radio astronomy systems

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