Weil code generation device and satellite navigation signal receiver

A code generation and storage device technology, applied in the field of satellite navigation signal ranging, can solve the problems of too many hardware resources and waste of storage space, etc.

Active Publication Date: 2015-07-29
TSINGHUA UNIV
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of directly storing 64 kinds of Weil codes in the memory chip takes up more hardware resources
And, since there is usually no need to use 64 kinds of Weil codes in M ​​channels at the same time, a lot of storage space is wasted

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Weil code generation device and satellite navigation signal receiver
  • Weil code generation device and satellite navigation signal receiver
  • Weil code generation device and satellite navigation signal receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Embodiments of the present application will be described in detail below with reference to the accompanying drawings. For the sake of brevity, in the descriptions of the embodiments of the present application, the same or similar components use the same or similar reference numerals.

[0017] figure 1 A Weil code generating device 10 according to the present application is shown. like figure 1 As shown, the Weil code generating device 10 includes: a storage device 100 , an address indication unit 200 , multiple cache groups 300 , and a computing unit 400 .

[0018] The Legendre sequence is stored in the storage device 100 .

[0019] The address indication unit 200 indicates the first read address and the second read address of the Legendre sequence corresponding to each Weil code in the Weil codes to be generated. For example, if the Weil codes of M channels need to be generated in real time, the address register 200 indicates the first read address and the second r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a Weil code generation device and a satellite navigation signal receiver. The Weil code generation device comprises a storage device which stores Legendre sequences; an address indicating unit which indicates a first reading address and a second reading address of the Legendre sequence corresponding to each Weil code of the Weil codes to be generated; a plurality of cache groups, wherein each cache group comprises a first cache unit and a second cache unit, the first cache unit of each cache group sequentially reading the Legendre sequence from the storage device according to the first reading address of the Weil code corresponding to each cache group, and the second cache unit of each cache group sequentially reading the Legendre sequence from the storage device according to the second reading address of the Weil code corresponding to each cache group; and an arithmetic unit which carries out exclusive-or operation on data obtained by the first cache unit of each cache group of the plurality of cache groups and data obtained by the second cache unit of the cache group to generate a plurality of Weil codes in real time. Multichannel real-time Weil code generation is realized in a hardware manner.

Description

technical field [0001] The application belongs to the field of satellite navigation signal ranging, and relates to a Weil code generation device and a satellite navigation signal receiver. Background technique [0002] Global Navigation Satellite Systems (GNSS) can complete many tasks such as positioning, navigation, and timing, and has become an important infrastructure to support the national economy and ensure national security. Satellite navigation needs to be realized by using ranging codes, and finding good ranging codes becomes the key to designing navigation signals. [0003] At present, the L1 signal of GPS uses the C / A code as the ranging code, and the C / A code belongs to the Gold code. The length of the Gold code is 2 n -1, but all but 1023 require truncated or grown implementations. However, too much truncation or growth will affect the relative performance of the Gold code. For example, the ranging code length of the L1C signal that GPS is going to put into ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/30
CPCG01S19/30
Inventor 孙冬凯崔晓伟朱永辉陆明泉
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap