Wireless network auxiliary map matching positioning method based on Beidou satellite navigation
A wireless network and Beidou satellite technology, applied in the field of satellite navigation and positioning calculation, can solve the problems of discontinuous and inaccurate positioning results, and achieve the effect of improving TTFF capability, improving positioning speed, and speeding up positioning speed
Pending Publication Date: 2021-12-10
BEIJING AUTOMATION CONTROL EQUIP INST
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Problems solved by technology
The existing network-assisted Beidou satellite navigation system ABDS adopts the online assisted positioning mode, and the intelligent terminal can quickly obtain assisted positioning information. This method may be affected by poor network signals in the environment of occlusion and satellite signal blind areas, and the positioning results in complex urban road conditions There will also be discontinuities and inaccuracies
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[0035] Below in conjunction with accompanying drawing and embodiment the technical scheme of invention is described in detail:
[0036] The invention provides a wireless network-assisted map matching and positioning method based on Beidou satellite navigation. Such as figure 1 As shown, the basic principle of the present invention is: the network provides auxiliary BDS information to the ABDS intelligent terminal. This auxiliary information is divided into two parts. The first part is auxiliary information for BDS pseudorange measurement, including BDS acquisition auxiliary information, BDS positioning auxiliary information, BDS sensitivity auxiliary information, BDS satellite working status information, etc.; the second part is used to calculate the auxiliary information of ABDS terminal position, such as BDS almanac and correction data, BDS ephemeris, BDS navigation message, etc. Using these information, the smart terminal can quickly capture the satellite, receive the meas...
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The invention provides a wireless network auxiliary map matching positioning method based on Beidou satellite navigation, which comprises the following steps that firstly, a positioning server sends provided auxiliary positioning information to an intelligent terminal through a network, and the intelligent terminal captures satellite signals by using the data, calculates a pseudo-range from the intelligent terminal to a satellite; and then the intelligent terminal returns the pseudo-range information to the positioning server through the network, and finally the positioning server calculates the position of the terminal. The positioning server transmits the position and map data information to the intelligent terminal through a network, or the intelligent terminal enters an offline mode for positioning under the condition that a network signal is not good. And the intelligent terminal matches the position information into an electronic map by adopting a map matching algorithm, and sends the position information to a corresponding user platform or server. The positioning speed and the positioning precision of the satellite navigation system are remarkably improved, and the sensitivity and the usability of the system are improved.
Description
technical field [0001] The invention relates to a wireless network-assisted map matching and positioning method based on Beidou satellite navigation, and belongs to the technical field of satellite navigation positioning solution. The invention is mainly applied in the intelligent traffic system. Background technique [0002] Satellite positioning has the advantages of high precision, low cost, and independent work. However, under poor signal conditions, it takes minutes, hours, or even failure to download data from the satellite to the receiver. With the rapid development and increasing popularity of mobile communication networks, several technologies for positioning services using mobile communication networks have been developed. However, the positioning accuracy of purely using the network is poor, and some networks need large-scale transformation. Facing the complex urban environment, a single positioning method cannot meet the requirements. In this case, the network-a...
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Login to View More IPC IPC(8): G01S19/40
CPCG01S19/40Y02D30/70
Inventor 孙艺宁韩舒文王勋高亚豪
Owner BEIJING AUTOMATION CONTROL EQUIP INST