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Coherent integration method and device applied to satellite signal capture

A technology of satellite signal acquisition and coherent integration, applied in the field of navigation, can solve problems such as weakening the effect of coherent integration, and achieve the effect of reducing hardware resource requirements, saving resources, and reducing chip area

Pending Publication Date: 2021-05-07
DATANG SEMICON DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limitation of the length of each data bit and the existence of phase jumps between adjacent data bits, the traditional coherent integration time is often very limited, because if the integration period spans multiple data bits, the data levels of different bits (Phase) is different in positive and negative, then different parts of the input data will be added and subtracted in the process of correlation and coherent integration, and the positive and negative will cancel each other, so that the effect of coherent integration will be weakened

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  • Coherent integration method and device applied to satellite signal capture
  • Coherent integration method and device applied to satellite signal capture
  • Coherent integration method and device applied to satellite signal capture

Examples

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Embodiment 1

[0035] like figure 2 As shown, a coherent integration method applied to satellite signal acquisition may include:

[0036] Step 201, combining the data bits to be coherently integrated into multiple data bit sequences according to possible phases;

[0037] Step 202, performing a coherent integration operation on the plurality of data bit sequences one by one, including: performing an intra-bit correlation operation on the current data bit in the single data bit sequence to obtain the correlation value of the current data bit, according to the current data bit The phase of the phase is added or subtracted from the operation result of the previous data bit to obtain the operation result of the current data bit; in this way, after the coherent integration operation of all data bits in a data bit sequence is completed, the operation result of the last data bit is is the coherent integral value of the data bit sequence;

[0038] Step 203, find the maximum value among the coheren...

Embodiment 2

[0062] A coherent integration device applied to satellite signal acquisition, such as Figure 4 As shown, can include:

[0063] A combining unit 41, configured to combine the data bits to be coherently integrated into multiple data bit sequences according to possible phases;

[0064] The computing unit 42 is configured to perform coherent integration operations on the plurality of data bit sequences one by one, including: performing an intra-bit correlation operation on the current data bits in the data bit sequence to obtain a correlation value of the current data bit, according to the current The phase of the data bit is added or subtracted from the operation result of the previous data bit to obtain the operation result of the current data bit; in this way, after the coherent integration operation of all data bits in a data bit sequence is completed, the operation of the last data bit The result is the coherent integral value of the data bit sequence;

[0065]The search u...

Embodiment 3

[0071] The present application also provides a navigation receiver, which includes the above-mentioned coherent integration device applied to satellite signal acquisition. For specific technical details, refer to Embodiment 1 and Embodiment 2.

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Abstract

The invention discloses a coherent integration method and device applied to satellite signal capture. The method comprises the following steps of: combining data bits to be subjected to coherent integration into a data bit sequence; and performing coherent integral operation on the data bit sequence one by one, specifically, performing intra-bit correlation operation on a current data bit in the data bit sequence to obtain a correlation value of the current data bit, and performing addition or subtraction operation according to a phase of the current data bit and an operation result of a previous data bit so as to obtain an operation result of the current data bit after completing the coherent integral operation of all the data bits in one data bit sequence as the above mode, taking the operation result of the last data bit as the coherent integral value of the data bit sequence; and searching the maximum value in the coherent integral values so as to apply the value to subsequent processing of satellite signal acquisition. According to the method and device of the invention, hardware resource requirements during ultra-long-time coherent integration can be reduced, so that resources are saved, and the chip area is reduced.

Description

technical field [0001] The invention relates to the technical field of navigation, in particular to a coherent integration method and device applied to satellite signal acquisition. Background technique [0002] Navigation technology has always played an important role in the development of human history, and with the continuous progress of society, this technology, especially satellite navigation and positioning technology, is more and more closely related to people's lives. At present, the main satellite navigation systems in the world include Global Positioning System (GPS, Global Positioning System), BD2 (Beidou 2nd Generation), Global Satellite Navigation System (GLONASS, GLObal NAvigation Satellite System) and Galileo Satellite Navigation System. Both GPS and BD2 use 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 and baseband dig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/25G01S19/30G01S19/24
CPCG01S19/24G01S19/25G01S19/30
Inventor 宋挥师刘晓燕徐雄伟赵海龙孙涛
Owner DATANG SEMICON DESIGN
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