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Adaptive radio frequency interference elimination method for radio astronomical signals

A radio astronomy and radio frequency interference technology, applied in astronomical navigation, measurement devices, instruments, etc., can solve the problems of the sensitivity and signal-to-noise ratio decline of observation equipment, and achieve the solution of sensitivity and signal-to-noise ratio decline, fast processing speed, The effect of high algorithm stability

Active Publication Date: 2020-03-27
XINJIANG ASTRONOMICAL OBSERVATORY CHINESE ACADEMY OF SCI
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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

Method used

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  • Adaptive radio frequency interference elimination method for radio astronomical signals
  • Adaptive radio frequency interference elimination method for radio astronomical signals
  • Adaptive radio frequency interference elimination method for radio astronomical signals

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Embodiment Construction

[0056] Such as figure 1 Shown is a flowchart of an adaptive radio frequency interference cancellation method for radio astronomy signals according to an embodiment of the present invention. The adaptive radio frequency interference elimination method of the present invention is applicable to various radio astronomy signals, and in this embodiment, the radio astronomy signals are pulsar signals.

[0057] Such as figure 1 As shown, the adaptive radio frequency interference elimination method of the radio astronomy signal specifically includes the following steps:

[0058] Step S1: Obtain baseband data, which includes reference data and observation data.

[0059] Wherein, the baseband data is acquired by an adaptive interference elimination system, and the adaptive interference elimination system includes a reference antenna system (that is, a reference system) and a radio telescope (that is, an observation system). In practical applications, the observation The data are obtai...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02G01C25/00
CPCG01C21/02G01C25/00
Inventor 托乎提努尔王娜张海龙王杰
Owner XINJIANG ASTRONOMICAL OBSERVATORY CHINESE ACADEMY OF SCI
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