GNSS multipath signal simulating-and-generating method and GNSS multipath simulating-and-generating system

Abstract

The invention provides a GNSS multipath signal simulating-and-generating method and a GNSS multipath simulating-and-generating system. The GNSS multipath signal simulating-and-generating method comprises the steps of acquiring a GNSS signal of an urban valley region by means of a high-sampling-rate broadband signal sampler and introducing out intermediate-frequency data, and furthermore calibrating acquisition route information by means of high-precision combined navigation calibration equipment; extracting a multipath signal characteristic parameter in the intermediate-frequency data through a multipath estimation algorithm; estimating three parameter models of the GNSS signal in an urban environment according to the multipath signal characteristic parameter, wherein the three parameter models comprises a multipath signal delay distribution probability density model, a multipath signal energy ebb model and a multipath signal life cycle model; generating the characteristic parameter of the simulated multipath signal based on the three parameter models, and transmitting the characteristic parameter of the simulated multipath signal to a navigation signal simulator, thereby generating a corresponding simulated multipath signal. The GNSS multipath signal simulating-and-generating method and the GNSS multipath signal simulating-and-generating system settle a technical problem of incapability of simulating the multipath signal with a reality characteristic.

Description

technical field [0001] The invention relates to satellite navigation signal simulator technology, in particular to a GNSS (Global Navigation Satellite System, Global Navigation Satellite System) multipath signal simulation generation method and system. Background technique [0002] Multipath interference is one of the main factors affecting the performance of receiver positioning. Although some multipath elimination algorithms have been proposed, these algorithms still cannot solve all types of multipath interference comprehensively because the multipath characteristics of signals vary greatly in different types of scenarios. Therefore, the scene-aware multipath cancellation method is an effective way to solve the multipath interference in different environments. In order to implement such methods, the receiver needs to accurately know the characteristics of multipath signal changes in various scenarios. Because the influence of multipath effect on signal carrier measureme...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a GNSS multi-path signal simulation generation method and system, aiming at the present situation that the current multi-path signal has a serious impact on GNSS applications and has complicated parameter characteristics, and solves the problem that existing navigation signal simulators cannot simulate real characteristics Technical issues with multipath signals

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