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Frame synchronization method and frame synchronization device for receiver of global positioning system

A global positioning system and receiver technology, applied in satellite radio beacon positioning systems, measuring devices, radio wave measuring systems, etc., can solve the problem of time-consuming frame synchronization processing, affecting the hot start speed of GPS receivers, and large data volumes And other issues

Active Publication Date: 2014-08-06
ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the almanac has 25 pages in total, each navigation message data can only contain one page of the almanac, therefore, there are 25 navigation message data to be saved, and the 25 navigation message data are about 20KB in total. The frame synchronization method has a large amount of saved data, and the process of comparing the correct word takes a long time, which will lead to a relatively long time-consuming frame synchronization process, which in turn affects the hot start speed of the GPS receiver and cannot achieve fast start

Method used

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  • Frame synchronization method and frame synchronization device for receiver of global positioning system
  • Frame synchronization method and frame synchronization device for receiver of global positioning system
  • Frame synchronization method and frame synchronization device for receiver of global positioning system

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Embodiment 1

[0056] see figure 1 , which is a method flow chart of a frame synchronization method for a global positioning system receiver disclosed in Embodiment 1 of the present application. The method is applied in a hot start mode and includes the following steps:

[0057] Step 101: Perform verification processing on the currently received satellite navigation message data until a correct word is verified;

[0058] The satellites in the global positioning system will continuously send satellite navigation message data, and the receiver is responsible for receiving the navigation message data sent by the satellite, and the receiver will verify the received satellite navigation message data word by word, and verify the received data Whether it is a correct word, if the correct word is verified, the verification process is stopped.

[0059] In this step, an existing correct word verification method can be used for verification, and the embodiment of the present invention does not limit t...

Embodiment 2

[0071] In order to describe the present application in more detail, Embodiment 2 of the present application provides a frame synchronization method for a global positioning system receiver, and a specific frame synchronization process is taken as an example for description. see figure 2 , which is a method flowchart of another frame synchronization method for a global positioning system receiver disclosed in Embodiment 2 of the present application, including the following steps:

[0072] Step 201: Perform verification processing on the currently received satellite navigation message data until a correct word is verified;

[0073] After the global positioning system receiver receives the satellite navigation message data sent by the satellite, it performs verification processing bit by bit to verify whether the received data is a correct word, and stops the verification when a correct word is verified. Verifying the correct word refers to checking whether the received navigat...

Embodiment 3

[0122] Corresponding to the frame synchronization method for the global positioning system receiver in the first embodiment above, the third embodiment of the present application also provides a frame synchronization device for the global positioning system receiver. see Figure 4 , which is a device structure diagram of a frame synchronization device for a global positioning system receiver disclosed in Embodiment 3 of the present application. Word count module 304 and font size determination module 305 . The internal structure and connection relationship of the device will be further introduced below in conjunction with the working principle of the device.

[0123] The first checking module 301 is used to check the currently received satellite navigation message data until a correct word is checked out;

[0124] Statistical frame number module 302 is used for counting from the receiving moment of the first word in the corresponding subframe during the last frame synchroniz...

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Abstract

An embodiment of the invention discloses a frame synchronization method and a frame synchronization device for a receiver of a global positioning system. The frame synchronization method comprises the following steps of verifying current received satellite navigation message data until a correct word is verified; counting the number of verified sub-frames in a time range from former frame synchronization to the current frame synchronization; determining corresponding sub-frame numbers during the current frame synchronization according to corresponding sub-frame numbers and the number of the sub-frames during the former frame synchronization; counting the number of verified words which cannot form a complete sub-frame in a time range from the former frame synchronization to the current frame synchronization; and determining corresponding work numbers during the current frame synchronization according to corresponding word numbers and the number of words during the former frame synchronization. According to the embodiment of the invention, quick frame synchronization of the receiver of the global positioning system can be realized.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a frame synchronization method and device for a global positioning system receiver. Background technique [0002] With the rapid development of the Global Position System (Global Position System, GPS), people have higher and higher requirements on the fast positioning capability of the GPS receiver. The fast positioning capability of the GPS receiver is mainly measured by the first positioning time. According to the different conditions when the GPS receiver is turned on and powered on, the first positioning is divided into three modes: cold start, wet start and hot start. When using for the first time, when the battery is exhausted and the ephemeris information is lost, or when the receiver is turned off and the receiver is moved for a distance of more than 1000 kilometers. The so-called warm start refers to the start of the GPS receiver that is more than two hours away from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23
CPCG01S19/13G01S19/23
Inventor 胡斌胡胜发
Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD