Flexible substrate-based high-dynamic GNSS receiver and navigation method thereof

Abstract

The present invention discloses a flexible substrate-based high-dynamic GNSS receiver hardware design and a navigation method. The method is as follows: key components of the receiver are an active antenna, an RF front-end processing module, a baseband signal digital processing module and a positioning resolving module, and hardware is implemented in a manner of software and hardware combination.Functions of the modules are as follows: the antenna converts a received satellite signal into a current signal, a high-frequency low noise amplifier amplifies the signal, compensates for attenuationof the signal during transmission, enhances a signal-to-noise ratio of the signal, the signal enters the RF front-end by passing through a band-pass filter; the RF front-end processing module performsamplification, frequency conversion, filtering, and analog-digital conversion on the satellite signal, and finally obtains a digital intermediate frequency signal; the baseband signal digital processing module performs processing of capturing, tracking, bit synchronization and frame synchronization on the digital intermediate frequency signal, to obtain a navigation measured value and a navigation telegraph text; and the positioning resolving module performs positioning resolving by using the navigation measured value and the navigation telegraph text, and finally obtains satellite information of a user, to obtain a positioning observed value.

Description

Technical field [0001] The invention relates to satellite navigation technology, in particular to a high dynamic GNSS receiver based on a flexible substrate and a navigation method thereof. Background technique [0002] High-dynamic receivers have gradually developed into an important platform load for spacecraft. They can provide spacecraft with global, all-weather, real-time, high-dynamic, and high-precision navigation information to improve the autonomy of spacecraft operations. The harsh cosmic environment and strong carrier dynamics make the application of GNSS receivers in space different from ground applications. Therefore, it is necessary to design highly dynamic GNSS receivers to adapt to the space application environment. Existing GNSS receivers do not fully consider the impact of high dynamics on the acquisition and tracking of GNSS signals, and have problems of complex structure, poor compatibility, and high cost. Summary of the invention [0003] The purpose of the p...

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Problems solved by technology

Existing GNSS receivers do not fully consider the impact of high dynamics on the acquisition and tracking of GNSS signals, and there are problems of complex structure, poor compatibility, and high cost

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