General simulated satellite broadcast signal synthesizer based on satellite star-time reconstruction

Abstract

The invention relates to a general simulated satellite broadcast signal synthesizer based on satellite star-time reconstruction, which is provided with a hardware circuit and special support software which are capable of realizing designed functions through a super-large-scale field programmable logic device, wherein the hardware circuit consists of an input bus interface, a satellite star-time reconstruction control quantity calculating unit, a four-stage cascaded star-time status reconstruction array, a signal processing branch and a signal combination output interface; and the special support software is shown in a form of a header file, a library or a target code and embedded into the specific simulator software of a satellite navigation system. Compared with the prior art, the general simulated satellite broadcast signal synthesizer based on the satellite star-time reconstruction has the advantages that: the support to a hardware processing unit for the multi-path signal real-time reconstruction of a single satellite and corresponding calculation software is provided; the real-time reconstruction of a multi-satellite signal environment of the conventional navigation system can be supported by multi-unit parallel integrated processing; and the functions of each branch of the general satellite star-time reconstruction and a broadcast satellite signal synthesizer can be configured flexibly or combined arbitrarily according to a user requirement.

Description

technical field [0001] The invention belongs to the technical field of navigation, simulated circuit and signal transmission, and relates to a simulated broadcast satellite signal synthesizer based on the reconstructed simulated satellite time state of each component satellite of GNSS (Global Navigation Satellite System), in particular to a A general-purpose simulated satellite broadcast signal synthesizer that reconstructs the satellite time observed by the receiver in real time and synthesizes broadcast signals of each simulated satellite. Background technique [0002] The satellite navigation system is a time measurement and positioning system, but the satellite time of each satellite cannot be directly observed, but obtained indirectly by observing the phase of the satellite broadcast signal and compensating for the delay of various signal propagation effects. The satellite navigation system simulation device can generate various navigation satellite signals representing...

AI Technical Summary

Problems solved by technology

However, with the improvement of the simulation scale and the need for single-satellite multi-frequency and multi-path simulation, if each multi-frequency and multi-path signal is simply regarded as a simulation channel and the direct synthesis method of simulation signals is used, hardware resources will be wasted , and it is very difficult to achieve high-precision consistent simulation control among multiple signal processing channels

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