A precise single point positioning method and positioning device based on opportunity signal assistance
A precise single-point positioning and signal technology, which is applied in the field of satellite positioning, can solve the problems of reduced flexibility in the use of PPP technology and the inability to correctly judge the status of the carrier, and achieve the effect of improving the flexibility of use
Active Publication Date: 2021-02-23
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
[0004] For the carrier to be positioned, such as a car driving in the city, its state is often switched between the moving state and the static state, and the existing PPP technology often cannot correctly judge this complex situation. The state of the carrier, that is to say, the existing PPP technology has the problem of being difficult to flexibly switch between static algorithms and dynamic algorithms, thus reducing the flexibility of PPP technology
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[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0053] Such as figure 1 As shown, the embodiment of the present invention provides a precise point positioning method based on signal-of-opportunity assistance, and the process may include the following steps:
[0054] S101. Calculate a first speed and a first acceleration by using a DTV signal.
[0055] IMU (Inertial measurement unit, inertial measurement unit) is a device that measures the three-axis attitude angle (or angular rate) and acceleration of an o...
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An embodiment of the present invention provides a precise point-of-opportunity positioning method and positioning device based on signal-of-opportunity, wherein the method includes: calculating the first speed and the first acceleration through the DTV signal; determining the current moment according to the first speed and the first acceleration; The second speed and the second acceleration measured by the IMU; respectively use the second speed and the second acceleration to filter and correct the fourth speed and the fourth acceleration calculated from the DTV signal at the current moment to obtain the third speed and the third acceleration ;Judge whether the current condition meets the first preset condition; if it is satisfied, then determine that the current state is static; if not, then determine that the current state is dynamic; according to the current state, use different preset PPP algorithms for positioning . The embodiments of the present invention can flexibly switch between the static PPP algorithm and the dynamic PPP algorithm, and improve the use flexibility of the PPP technology.
Description
technical field [0001] The invention relates to the technical field of satellite positioning, in particular to a precise single point positioning method and positioning device based on signal of opportunity assistance. Background technique [0002] PPP (Precise Point Position, precise point positioning) technology is a new GPS positioning technology developed in recent decades that allows dual-frequency GPS (Global Positioning System, Global Positioning System) users to obtain location information with a single receiver . PPP technology was first developed for static positioning. With the development of satellite orbit and clock products, dynamic PPP is being researched and applied more and more. [0003] Compared with static PPP, dynamic PPP is more complex in error correction such as multipath effect and tropospheric delay correction, especially in the detection and repair of cycle slips and the determination of integer ambiguity. For static PPP and dynamic PPP, their Ka...
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IPC IPC(8): G01S19/49
CPCG01S19/49
Inventor 邓中亮赵鹤胡恩文朱棣刘延旭唐诗浩綦航汤灿阳
Owner BEIJING UNIV OF POSTS & TELECOMM