GPS locating method and GPS software receiver based on dual-core processor

A technology of GPS positioning and computing processor, which is applied in the field of GPS positioning and can solve the problems of undisclosed positioning methods and the like

Inactive Publication Date: 2008-08-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Wherein the GPS software receiver with dual-core processor

Method used

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  • GPS locating method and GPS software receiver based on dual-core processor
  • GPS locating method and GPS software receiver based on dual-core processor
  • GPS locating method and GPS software receiver based on dual-core processor

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Embodiment 1

[0063] Embodiment 1: This embodiment relates to a method for parallel calculation and positioning of a GPS software receiver based on a dual-core processor, which specifically includes the following steps:

[0064] The first step: the radio frequency front-end unit carries out down-frequency processing to the signal of GPS L1 frequency band, and carries out AD conversion, by USB interface, data is transmitted to PC machine to be processed; The present embodiment adopts portable miniature radio frequency front-end GPS data sampler, it passes The portable magnetic antenna collects GPS L1 frequency band signals. The frequency of the intermediate frequency digital signal generated after down-frequency is: 4.1304MHz, and its sampling frequency is: 16.3676MHz. The collected data is input into the PC hard disk in the form of binary files through the USB interface.

[0065] The second step: the signal acquisition step, in this step, based on two CPU processors, use the parallel code ...

Embodiment 2

[0104] Embodiment two: present embodiment relates to a kind of GPS software receiver based on dual-core processor, comprise GPS radio frequency front-end hardware part and PC, wherein, PC comprises the operation processor of two parallel settings: the first operation processor and The second computing processor, both of which are provided with a GPS signal processing program, the corresponding flow is as follows Figure 6 and Figure 7 As shown, the specific description has been recorded in Embodiment 1, and those skilled in the art can obtain relevant programs according to these flow charts, realize a GPS software receiver based on a dual-core processor and use it to realize GPS positioning.

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Abstract

The invention discloses a GPS positioning method and GPS software receiver which is based on dual-core processor, wherein, GPS positioning method includes the following steps: lower frequency process, signal capture, parallel arithmetic carrier wave, C/A code tracking process, pseudorange and ephemeris data resolving, satellite preferable choice, single point positioning resolving involved in GPS receiver and output; GPS software receiver which is based on dual-core processor, including GPS PF hardware part and PC, the PC machine at least includes two parallel equipped processors the first arithmetic processor and second arithmetic processor. The invention GPS positioning method uses multi-operation core processor as the operation platform, which designs and achieves parallel processing and algorithms for capturing and tracking GPS signal, which reduces resolving time significantly and enhances working efficiency of work.

Description

1. Technical field [0001] The present invention relates to a GPS positioning method, in particular to a dual-core processor-based GPS software receiver parallel calculation and positioning method; at the same time, it relates to a GPS software receiver for realizing the positioning method, in particular to a GPS software receiver with GPS software receiver for multi-core processors. 2. Background technology [0002] GPS (Global Positioning System) global positioning system can provide users with all-weather, real-time three-dimensional positioning on a global scale. GPS is widely used in geodesy, weather monitoring, vehicle navigation and related military fields. The traditional GPS receiver is based on the ASIC (Application Specifc Integrated Circuit) structure, that is, the radio frequency front-end and signal processing part are implemented by a dedicated custom chip, which is called a hardware receiver. Since the signal processing algorithm of the hardware receiver is ...

Claims

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Application Information

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IPC IPC(8): G01S5/02G01S1/02G01S19/42
Inventor 苗剑峰陈武孙永荣刘建业俞晓磊许睿熊智赖际舟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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