Satellite navigation receiver with fixed point sigma rho filter

A satellite navigation and receiver technology, applied in satellite radio beacon positioning systems, instruments, radio wave measurement systems, etc., to solve problems such as not being correctly restricted

Active Publication Date: 2018-05-11
DEERE & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a sigmaro filter using floating-point calculations may be difficult to implement using digital circuits, and there may be reliability and stability issues without special handling, such as the presence of cross-correlation terms in the sigmaro filter Possibility that dynamic propagation and / or measurement updates may not be properly constrained

Method used

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  • Satellite navigation receiver with fixed point sigma rho filter
  • Satellite navigation receiver with fixed point sigma rho filter
  • Satellite navigation receiver with fixed point sigma rho filter

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Embodiment Construction

[0021] The following description describes, illustrates and illustrates one or more specific embodiments of the invention in accordance with the principles of the invention. This description is provided not to limit the invention to the embodiments described herein, but to explain and teach the principles of the invention so that those of ordinary skill in the art can understand these principles and, based on that understanding, can apply them to not only practice The described embodiments also implement other embodiments that are conceivable in light of these principles. The scope of the present invention is intended to cover all embodiments that may come within the scope of the appended claims either literally or under the doctrine of equivalents.

[0022] It should be noted that in the specification and drawings, similar or substantially similar elements may be labeled with the same reference numerals. However, sometimes these elements may be labeled with different referen...

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Abstract

A multi-band satellite navigation receiver (11) for carrier and code tracking using a fixed point sigma rho filter (42) with improved stability is described. The receiver (11) simplifies and speeds upthe data processing in the filter (42) to adaptively accommodate common information from aggregate bands and obtain the accurate position of the receiver (11) in real time. The filter (42) may utilize a standard deviation function and a cross correlation function while determining adaptive scale factors to ensure that the filter (42) is stable and reliable.

Description

technical field [0001] This application relates generally to satellite navigation receivers with fixed point sigmaro filters. In particular, the present application relates to multi-band satellite navigation receivers with improved stability using fixed-point sigma rho filters for carrier and codeword tracking. Background technique [0002] The Global Navigation Satellite System (GNSS) utilizes satellites to enable receivers to determine position, velocity and time with a very high degree of accuracy and precision using signals transmitted from the satellites. Such GNSS include the Global Positioning System (GPS), GLONASS and Galileo. The signal transmitted from the satellite comprises one or more carrier signals at separate known frequencies, eg a first carrier (L1), a second carrier (L2) and an additional third carrier (L5) in GPS. A codeword such as a pseudorandom (PN) noise code modulated with information may modulate the carrier of the signal and may be unique for eac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/01G01S19/13G01S19/30
CPCG01S19/30G01S19/24G01S19/29
Inventor 俞炜理查德·G·基根罗纳德·R·黑奇
Owner DEERE & CO
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