Mirror point high dynamic suppressing correlator adaptive to spaceborne GNSS-R receiver

Abstract

The invention discloses a mirror point high dynamic suppressing correlator adaptive to a spaceborne GNSS-R receiver. The correlator comprises a direct signal tracking module (1), a delay module (2), a mirror point high dynamic suppressing control module (3), a mirror point high dynamic suppressing processing module (4), a mirror point high dynamic suppressing infusing module (5), a carrier compensation module (6) and an interference processing module (7). The certain delay processing is performed on direct signals after carrier tracking firstly, the mirror reflection high dynamic suppressing is performed, interference processing is performed on reflection signals after carrier compensation, and the two-dimensional delay Doppler correlation power is acquired finally. The correlator is used for producing local copying carriers, local copying code generation is omitted, interference processing is performed on the direct signals and reflection signals after delay Doppler compensation processing, the Doppler frequency shift of one mirror reflection point in different sampling times can be acquired, the speckle noise of a mirror reflection region is suppressed, and the signal-noise ratio of the signals is increased.

Description

technical field [0001] The present invention relates to a GNSS-R receiver, more particularly, to a correlator suitable for space-borne GNSS-R receivers and capable of suppressing high dynamics of mirror points. By processing the high-speed moving specular reflection points, the spaceborne GNSS-R receiver can improve the accuracy of sea surface measurement in sea surface inversion. Background technique [0002] Global Navigation Satellite System (GNSS) is a satellite-based radio navigation system that uses artificial earth satellites as navigation platforms, providing all-weather, high-precision positions for various military and civilian carriers on land, sea, air, and space around the world. , speed and time information, so it is also called space-based positioning, navigation and timing (PNT) system. Global Navigation Satellite System (GNSS) is a unified name for individual satellite navigation and positioning systems such as Global Positioning System (GPS), GLONASS, and ...

AI Technical Summary

Problems solved by technology

The speckle noise existing in the blazed area to which the specular reflection point belongs will affect the signal processing of the traditional spaceborne GNSS-R receiver, which will cause a large time delay error, and the speckle noise weakens the signal-to-noise ratio of the signal, thereby reducing the oceanographic high precision

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