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Method and apparatus for capturing navigation signals

A navigation signal and signal technology, applied in the field of capturing navigation signals, can solve problems such as difficult engineering practice, increased capture complexity, and low computing efficiency

Active Publication Date: 2017-10-20
DATANG SEMICON DESIGN
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Problems solved by technology

It can be clearly seen that the "full bit method" needs to calculate 20 sets of data, but only one of the data is finally used, and the calculation efficiency is very low, resulting in a greatly increased capture complexity, which is difficult to use in engineering practice

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  • Method and apparatus for capturing navigation signals
  • Method and apparatus for capturing navigation signals

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Embodiment Construction

[0107] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the accompanying drawings, which cannot be used to limit the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and various manners in the embodiments can be combined with each other.

[0108] see figure 2 , the embodiment of the present invention proposes a method for capturing signals, including:

[0109] Step 200, the receiver obtains a first signal segment whose length is an integer multiple of a preset length from the data sequence obtained by performing mixing and correlation processing on the intermediate frequency signal from the satellite.

[0110] In this step, the length refers to the length of time, and the unit is milliseconds (ms).

[0111] In this step, how to perform mixing and correlation processing on the intermediate fre...

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Abstract

A method and apparatus for capturing signals are disclosed. The method includes the steps of obtaining first signal segments, of which the length is integer multiple of the preset length, from a data sequence obtained by frequency mixing and related processing of intermediate frequency signals; dividing each second signal segments with preset length in the first signal segments into a third signal segment and a fourth signal segment; determining the position of the phase jump of each second signal segment for the m time according to the (2m+1) signal segment and the (2m+2) signal segment; determining whether each preset condition is satisfied; if all the preset conditions are not satisfied, determining m signal segment to be divided according to the position of the phase jump determined by the m time; dividing the determined m signal segment to be divided into the (2m+3) signal segment and the (2m+4) signal segment, wherein m is an integer greater than or equal to 1; if any one preset condition is satisfied, determining the coherent integration interval according to the position of the phase jump; and conducting coherent integration for the signal segments corresponding to the coherent integration interval.

Description

technical field [0001] This article relates to, but is not limited to, navigation signal receiving technology, and particularly relates to a method and device for capturing navigation signals. Background technique [0002] Navigation technology has always played an important role in the development of human history, and with the continuous progress of society, satellite navigation and positioning technology is more and more closely related to life. At present, satellite navigation systems in the world mainly include Global Positioning System (GPS, Global Positioning System), Beidou (BD2, BeiDou), GLONASS (Global NAvigation Satellite System), Galileo (Galileo) and so on. Among them, both GPS and BD2 use Code Division Multiple Access (CDMA, Code Division Multiple Access) technology, and their physical layer frame structures have many similarities, so they are similar in receiver design, including RF front-end processing, baseband digital There are three modules of signal proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/24
CPCG01S19/246
Inventor 宋挥师刘晓燕徐雄伟刘航赵海龙孙涛
Owner DATANG SEMICON DESIGN
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