Signal acquisition and processing system and method

Abstract

The invention provides a signal acquisition and processing system. The system is used for collecting and processing multiple paths of array element signals received by a phased array feed source. Thesystem comprises: a signal acquisition and preprocessing unit comprising a first preset number of nodes, each node acquiring a preset number of array element signals, preprocessing the array element signals, dividing the preprocessed array element signals into a second preset number of narrowband signals of different frequency bands, and outputting the second preset number of narrowband signals; acorrelation and beam forming unit which comprises a third preset number of nodes, wherein each node synthesizes the narrowband signals of the fixed frequency band in the first preset number of nodesinto a fourth preset number of beams; and a multi-beam astronomical processing unit which 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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