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Method and apparatus for decompression of compressed long-term-orbit data

a long-term orbit and data compression technology, applied in the field of satellite orbit information generation, can solve the problems of reducing redundancy, difficult, and sometimes impossible, and remote gnss receivers cannot accurately determine positions, etc., and achieve the effect of reducing redundancy

Inactive Publication Date: 2008-08-07
AVAGO TECH WIRELESS IP SINGAPORE PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This solution provides satellite trajectory and clock information valid for several days, reducing bandwidth usage and ensuring continuous operation of GNSS receivers by decompressing the data at the receiver, eliminating the need for periodic updates from satellites or Assisted-GNSS sources.

Problems solved by technology

It is always slow (no faster than 18 seconds), frequently difficult, and sometimes impossible (in environments with very low signal strengths), for a GNSS receiver to download an ephemeris from a satellite.
Without such a periodic update, the remote GNSS receiver will not accurately determine position.
Until recently, the deficiency of the current art was that there was no source of satellite trajectory and clock information that is valid for longer than a few hours into the future, and it can be expensive to send the ephemeris information repeatedly to the many remote devices that may need it.
Moreover, mobile devices may be out of contact from the source of the Assisted-GNSS information when their current ephemeris becomes invalid.

Method used

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  • Method and apparatus for decompression of compressed long-term-orbit data
  • Method and apparatus for decompression of compressed long-term-orbit data
  • Method and apparatus for decompression of compressed long-term-orbit data

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Embodiment Construction

[0021]FIG. 1 depicts a block diagram of a system 100 for creating and distributing long term satellite tracking data (LTO). The global navigation satellite system (GNSS) may include the global positioning system (GPS), GLONASS, GALILEO, or other satellite systems that may use LTO to enhance the performance of the receiver. The following disclosure uses GPS as an illustrative system within which the invention operates. From the following disclosure, those skilled in the art will be able to practice the invention in conjunction with other satellite systems.

[0022]A network of GNSS tracking stations 102 is used to collect measurement data from the GNSS satellites 104. Such a network is described in detail in U.S. patent application Ser. No. 09 / 615,105, filed Jul. 13, 2000. The network could comprise several tracking stations that collect satellite tracking information (STI) from all the satellites in the constellation, or a few tracking stations, or a single tracking station that only c...

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PUM

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Abstract

A method and apparatus for processing long-term-orbit data that is valid for an extended period of time into the future (i.e., long-term-orbit data). The long-term-orbit data is processed by reducing redundant information from the data to form compressed long-term-orbit data that is subsequently decompressed or reconstructed for use in a GNSS receiver.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of a co-pending U.S. application Ser. No. 11 / 724,627, filed Mar. 15, 2007, which is a continuation-in-part application of U.S. patent application Ser. No. 11 / 333,787 filed Jan. 17, 2006, which is a continuation-in-part application of co-pending U.S. patent application Ser. No. 09 / 993,335, filed Nov. 6, 2001, which is a continuation-in-part of U.S. patent application Ser. No. 09 / 884,874, filed Jun. 19, 2001, now U.S. Pat. No. 6,560,534, which is a continuation-in-part of U.S. patent application Ser. No. 09 / 875,809, filed Jun. 6, 2001, now U.S. Pat. No. 6,542,820. This application contains subject matter that is related to co-pending U.S. patent application Ser. No. 09 / 715,860, filed Nov. 17, 2000, now U.S. Pat. No. 6,417,801. Each of the aforementioned related patents and / or patent applications is herein incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F19/00G01S19/06G01S19/25G01S19/28G01S19/33G01S19/48
CPCB64G1/1014G01C21/00G01S19/27G01S19/258G01S19/05
Inventor VAN DIGGELEN, FRANKRIBEN, MATTHEWDE SALAS, JAVIER
Owner AVAGO TECH WIRELESS IP SINGAPORE PTE