GPS (global positioning system) simulator and receiver closed-loop testing method and system

A technology of GPS receiver and closed-loop testing, which is applied in the field of GPS satellite navigation, and can solve the problems of inaccurate measurement of receiver observation accuracy and difficult pseudo-range measurement accuracy, etc.

Inactive Publication Date: 2012-07-25
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

In this way, the accuracy of various observations of the receiver cannot be accurately measured, such as commonly used pseudo-range observations, and it is difficult for general simulators to objectively evaluate the pseudo-range measurement accuracy of the receiver

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  • GPS (global positioning system) simulator and receiver closed-loop testing method and system
  • GPS (global positioning system) simulator and receiver closed-loop testing method and system

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Embodiment Construction

[0027] see figure 1 , the present invention is a GPS simulator and receiver closed-loop testing system, comprising a GPS simulator and a GPS receiver. The GPS simulator is mainly composed of a signal processing unit, a radio frequency signal output unit, a synchronous pulse signal output unit, an ideal signal output unit and a result comparison unit. The radio frequency signal output unit, the synchronous pulse signal output unit and the ideal signal output unit are respectively connected to the output end of the signal processing unit, and the result comparison unit is connected to the input end of the signal processing unit. The GPS receiver is mainly composed of a traditional receiving unit, a traditional positioning calculation unit and an ideal positioning calculation unit. Both the RF signal output unit and the synchronous pulse signal output unit of the GPS simulator are connected to the input end of the traditional receiving unit of the GPS receiver, and the output en...

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Abstract

The invention discloses a GPS (global positioning system) simulator and receiver closed-loop testing system. A GPS simulator not only provides GPS radiofrequency signals, but also outputs synchronization pulse corresponding to the radiofrequency signals for a GPS receiver, and carrier phase information, pseudo code phase information and satellite position information which correspond to various GPS signals. Accordingly, the GPS receiver not only can process GPS radiofrequency information under control of the synchronization pulse, realizes traditional signal capturing tracking, performs pseudo-range measurement and almanac decoding and completes positioning resolving, but also can directly utilize the phase information and the satellite position which are provided by the simulator to realize positioning resolving. By the aid of two calculating processes, measurement precision of pseudo-range, namely pseudo code phase, or carrier phase, almanac error analysis and positioning resolving method merits of the GPS receiver can be compared and analyzed, or simulation precise of the GPS simulator is detected.

Description

technical field [0001] The invention relates to the field of GPS satellite navigation, in particular to a GPS simulator and receiver closed-loop testing method and system. Background technique [0002] The GPS (Global Positioning System) of the United States is the benchmark of the current satellite navigation system. GPS positioning has the characteristics of all-weather and high precision, and it is widely used in military and civilian fields in various countries in the world. Today's GPS receivers are developing very fast, and their size, power consumption, sensitivity, and accuracy have greatly improved compared to ten years ago. In addition to the technical development of the receiver itself, the construction of the GPS system is also constantly updated. Future GPS satellites will have a higher time reference, higher power, and a more optimized signal system to provide users with better services. [0003] In the development of the GPS navigation system, the constructi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23
Inventor 纪元法孙希延符强王守华邓洪高严素清吴孙勇张瑞霞
Owner GUILIN UNIV OF ELECTRONIC TECH
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