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Indoor Positioning Method Based on Dual Frequency Combination

An indoor positioning and frequency point technology, applied in satellite radio beacon positioning systems, instruments, measuring devices, etc., can solve the problems of poor positioning accuracy of indoor pseudo-satellites and difficulty in using them

Active Publication Date: 2020-10-16
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0003] Based on the above-mentioned reasons, the technical problem solved by the present invention is to effectively solve the problem that the indoor pseudolite positioning accuracy is poor and difficult to use by using the positioning method of dual-frequency combination. At the same time, because it is compatible with GNSS signals, it effectively realizes indoor and outdoor seamless navigation Service capabilities

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  • Indoor Positioning Method Based on Dual Frequency Combination
  • Indoor Positioning Method Based on Dual Frequency Combination
  • Indoor Positioning Method Based on Dual Frequency Combination

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Embodiment Construction

[0068] The present invention will be further explained below in conjunction with the accompanying drawings.

[0069] The indoor positioning method based on dual-frequency combination of the present invention comprises the following steps:

[0070] (1) The transmitting base station generates multiple dual-frequency navigation signals under the control of the same clock source;

[0071] (2) The transmitting base station passes each dual-frequency navigation signal through a switch filter, filters out one of the dual-frequency navigation signals in turn, calculates the offset between the other signal and 1pps, and adjusts the zero-phase point and 1PPS rising edge alignment, so that the two signals have the same offset relative to 1pps;

[0072] (3) The receiving station receives multiple dual-frequency navigation signals, and calculates the number of carrier phase cycles of each frequency point signal by comparing the dual-frequency fractional phase ratio relationship of each du...

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Abstract

The present invention proposes an indoor positioning method based on dual-frequency combination. The main steps are to generate multiple dual-frequency navigation signals by the transmitting base station, and make the offsets of the two signals relative to 1pps the same; then calculate the measured distance value or Combining the measured distance difference between the phases; finally using the least squares positioning algorithm for positioning; the present invention constructs observations by using dual-frequency signals to effectively expand the scope of indoor positioning, and the resulting positioning can be obtained through simulation verification The accuracy can meet the requirement of 1 meter.

Description

technical field [0001] The invention has a wide scope of application, and is especially aimed at the current field of indoor and outdoor seamless fusion positioning. Background technique [0002] Global navigation satellite system (GNSS) has been widely used in people's daily life. It is ubiquitous in national economic life such as sea, land and air transportation, time synchronization network, life safety, location service, etc., and has become a recognized modern society. One of the infrastructure. However, in areas such as tunnels, urban canyons, and indoors, positioning services cannot be completed due to signal blocking. Due to various defects of the current pseudolite indoor positioning system, the indoor positioning accuracy is difficult to meet the positioning requirements. This paper proposes an indoor positioning method based on dual-frequency combination on the basis of the existing indoor multi-array pseudolite to ensure that the indoor positioning accuracy can ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/43G01S19/40
CPCG01S19/40G01S19/43
Inventor 张衡甘兴利黄璐李爽祝瑞辉梁晓虎
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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