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Navigation signal based minimum value bit alignment method

A technology of navigation signal and minimum value, which is applied in the direction of satellite radio beacon positioning system, measuring device, instrument, etc., and can solve the problem that the accuracy rate needs to be improved

Inactive Publication Date: 2016-12-07
GUANGDONG UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the accuracy of this method needs to be improved under the interference of Gaussian noise added to the data

Method used

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  • Navigation signal based minimum value bit alignment method
  • Navigation signal based minimum value bit alignment method
  • Navigation signal based minimum value bit alignment method

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Embodiment Construction

[0036] The invention provides a minimum value bit synchronization method of GPS navigation signal under weak signal such as figure 1 As shown, it includes the following steps:

[0037] (1) Enter the acquisition state through the GPS receiver and capture the GPS satellite signal data;

[0038] (2) Tracking the captured satellite signal and obtaining the navigation message data of the I branch;

[0039] (3) The energy accumulation method is adopted for the navigation signal of the I branch, that is, the energy modulus of every 20 consecutive points is taken and accumulated;

[0040] (4) The position of the energy minimum point is its bit synchronization point, repeat (3) and check.

[0041] Figure 2-Figure 4 It is a flow chart of the method algorithm of the present invention, further:

[0042] The above step (1) enters the capture state through the GPS receiver and captures the GPS satellite signal data. Specifically include the following steps:

[0043] 11) Using the par...

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Abstract

The invention relates to a GPS navigation signal based minimum value bit alignment method, which comprises the following steps: 1) entering a capturing state through a GPS receiver to capture GPS satellite signal data; 2) tracking the captured satellite signals and obtaining navigation text data of branch I; 3) using an energy accumulation method for the navigation signals of branch I; and 4) its energy minimum value bit position representing its bit alignment point, repeating step (3) and testing.

Description

technical field [0001] The invention relates to the field of signal and information processing, in particular to a minimum value bit synchronization method based on navigation signals. Background technique [0002] GPS positioning technology uses high-altitude GPS satellites to transmit L-band carrier frequency radio ranging signals to the ground, which are continuously received by user receivers on the ground in real time, thereby calculating the location of the receiver antenna. The space portion of the GPS system consists of GPS satellites, known as the satellite constellation. To determine a person's location, at least four satellites need to be detected simultaneously. The distribution setting of the satellite constellation should ensure that at least four satellites can be observed simultaneously at any point on the earth. [0003] Among the existing methods for bit synchronization of GPS navigation message data, the histogram method is usually used. In the applicati...

Claims

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Application Information

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IPC IPC(8): G01S19/25
CPCG01S19/25G01S19/256
Inventor 刘怡俊喻焕然
Owner GUANGDONG UNIV OF TECH
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