Navigation message synchronization method, receiver and device

A navigation message and receiver technology, which is applied in the field of satellite navigation, can solve the problems of increasing the subframe synchronization time for the receiver's first positioning time, and the difficulty of checking parity bits, so as to improve performance and reduce the first positioning time. Effect

Inactive Publication Date: 2014-03-26
MAISHI ELECTRONICS (SHANGHAI) LTD
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Problems solved by technology

In addition, in the existing method, after the subframe header is matched, it is necessary to check the parity bit
When the signal received by the satellite is weak, it will be difficult to check the parity bit, thus further increasing the time for subframe synchronization and the time for the first positioning of the receiver (Time To First Fix, TTFF for short)

Method used

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  • Navigation message synchronization method, receiver and device
  • Navigation message synchronization method, receiver and device
  • Navigation message synchronization method, receiver and device

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Embodiment Construction

[0028] Detailed reference will be given below to examples of the present invention. Although the present invention has been illustrated and illustrated by these embodiments, it should be noted that the present invention is not limited to these embodiments. On the contrary, the invention covers all alternatives, modifications and equivalents which are within the spirit and scope of the invention as defined by the appended claims.

[0029] In addition, in order to better illustrate the present invention, numerous specific details are given in the specific embodiments below. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, processes, components and circuits are not described in detail so as to highlight the gist of the present invention.

[0030] According to the embodiment of the present invention, a method and device for quickly synchronizing navigation message...

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Abstract

The invention discloses a navigation message synchronization method, receiver and device. The method comprises the following steps: obtaining first synchronization information from the receiver, wherein the first synchronization information is used for synchronizing first navigation messages received from navigation equipment by the receiver; determining the time for sending second navigation messages by the navigation equipment according to the first synchronization information; calculating second synchronization information according to the time for sending the second navigation messages, wherein the second synchronization information is used for synchronizing the second navigation messages. Compared with the prior art, the navigation message synchronization method, receiver and device provided by the invention have the advantages that the navigation messages can be quickly synchronized without matching sub-frame headers, the time to first fix (TTFF) is shortened, and the TTFF performance is improved.

Description

technical field [0001] The invention relates to a satellite navigation technology, in particular to a method, a receiver and a device for synchronizing navigation messages. Background technique [0002] A satellite navigation system (Global Navigation Satellite System, GNSS system) is a system for automatically providing geospatial positioning on a global scale. This system enables small electronic receivers to determine their position (longitude, latitude and altitude) to within a few meters by means of a time signal, which is transmitted by time from a satellite to the receiver in the form of radio waves. The receiver calculates the precise time and position, and the calculated time and position information is used as the data basis for navigation. [0003] Existing navigation systems, such as the Global Positioning System (GPS for short) and the Beidou (also known as the compass) navigation system, need to obtain the precise sending time of the navigation message from th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/13G01S19/37
CPCG01S19/243G01S19/23G01S19/38G01S19/24
Inventor 邹景华苟娟苏衍荣
Owner MAISHI ELECTRONICS (SHANGHAI) LTD
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