A signal acquisition and processing system and method

Abstract

The present disclosure provides a signal acquisition and processing system, which is used to acquire and process multi-channel array element signals received by a phased array feed source. The system includes: a signal acquisition and preprocessing unit, including a first preset number of nodes, each A node collects a preset number of array element signals, preprocesses the array element signals, and divides the preprocessed array element signals into a second preset number of narrowband signals of different frequency bands and outputs them; the correlation and beamforming unit, It includes a third preset number of nodes, and each node synthesizes a fourth preset number of beams from fixed frequency band narrowband signals in the first preset number of nodes; a multi-beam astronomical processing unit is used for analyzing and storing the beams.

Description

technical field [0001] The invention relates to the technical field of radio telescopes, in particular to a signal acquisition and processing system and method. Background technique [0002] The field of view (Field of View, FOV) of a radio telescope is an important index that reflects the telescope's ability to survey the sky, and it characterizes the scope of the observable sky area at any given moment. For a single-aperture radio telescope, the field of view and resolution can be expressed by half-power beam width (Half-power Beam Width, HPBW): HPBW=1.02λ / D, where λ is the observation wavelength, and D is the telescope’s diameter. Large-aperture radio telescopes obtain higher resolution and sensitivity by increasing the diameter D, but at the same time, the field of view of the telescope decreases with the increase of the aperture, resulting in a decrease in the area of ​​the observed sky area per unit time. For observations such as pulsar or transient source search, mo...

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