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Navigational satellite signal tracking method and device

A navigation satellite and signal tracking technology, applied in the field of satellite navigation, can solve the problems of limiting weak signal coherent integration length, unable to provide signal integration gain, affecting the navigation satellite weak signal navigation satellite tracking ability, etc.

Active Publication Date: 2015-07-08
UNICORE COMM INC
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Problems solved by technology

[0007] However, this method is limited by the navigation message broadcast by the satellite at the same time. This is because when the positive or negative of the navigation message bit is unknown, the coherent integration time of the navigation satellite signal cannot exceed the bit length of the navigation message, thus limiting the coherence of weak signals The integration length cannot provide sufficient signal integration gain, which affects the tracking ability of navigation satellites with weak signals of navigation satellites

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  • Navigational satellite signal tracking method and device

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[0047] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0048]figure 1 It is a flow chart of the tracking method under the weak signal of the navigation satellite of the present invention, as figure 1 shown, including:

[0049] Step 100: Determine whether the locally stored navigation message is a valid message. Specifically include:

[0050] Obtain the locally stored navigation message, which includes the launch time;

[0051] According to the transmission time of the navigation message, it is judged whether the message is a valid navigation message.

[0052] Step 101: When there is a valid navigation message, obtain each coh...

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Abstract

The invention discloses a navigational satellite signal tracking method and device. The method comprises the steps that when effective navigation messages exist, coherent integral results of a branch I, data values of the navigation messages corresponding to the coherent integral results of the branch I, coherent integral results of a branch Q and data values of the navigation messages corresponding to the coherent integral results of the branch Q are obtained; energy values are calculated after the coherent integration of the navigation satellite signal according to the obtained coherent integral results of the branch I, the data values of the navigation messages corresponding to the coherent integral results of the branch I, the coherent integral results of the branch Q and the data values of the navigation messages corresponding to the coherent integral results of the branch Q; the navigation satellite signal is verified according to the energy values which are calculated after the coherent integration of the navigation satellite signal. According to the technical scheme, stable tracking can be conducted on the navigation satellite signal in the weak signal environment, and it is guaranteed that a receiver continuously and stably outputs navigation and location results.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a navigation satellite signal tracking method and device under weak navigation satellite signals. Background technique [0002] The satellite navigation application industry is playing an increasingly important role in the national economy, and there will be great room for development in the application fields involving aviation, sea, railway, construction, telecommunications, and electric power. The coexistence of multiple satellite navigation systems improves the availability of the system and broadens the application field. [0003] Satellite navigation products are increasingly integrated into our lives. At present, the tracking stability of navigation products is not enough and the tracking sensitivity is low, and accurate positioning cannot be achieved in complex weak signal scenarios. The fundamental way to solve the above problems is to explore new strategie...

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Application Information

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IPC IPC(8): G01S19/24
CPCG01S19/246
Inventor 吴红甲张正烜廖炳瑜黄金王玉宝陈新王婷婷张郁
Owner UNICORE COMM INC
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