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Device and method for precise synchronization of binary offset carrier signal

A technology of offset carrier and precise synchronization, applied in the field of satellite navigation, which can solve the problems of difficulty in use and complicated auxiliary signals, and achieve the effect of eliminating false captures

Inactive Publication Date: 2015-11-04
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of ASPeCT is that it is only for sinBOC(n,n) signals
For GRASS technology, the local auxiliary signal is too complicated to use, and the positive side peak of the combined correlation result is much smaller than the main peak, but it still exists

Method used

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  • Device and method for precise synchronization of binary offset carrier signal
  • Device and method for precise synchronization of binary offset carrier signal
  • Device and method for precise synchronization of binary offset carrier signal

Examples

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Embodiment

[0044] The receiving system of the BOC modulation signal involved in this embodiment includes: an antenna, a radio frequency front-end processing module and a correlator, wherein: the antenna receives the navigation signal, the antenna is connected to the radio frequency front-end processing module to transmit the navigation signal, and the radio frequency front-end processing module is connected to the correlator The digital intermediate frequency navigation signal is transmitted, and the correlator outputs the correlation result between the received signal and the local signal without positive side peaks.

[0045] The radio frequency front-end processing module processes radio frequency satellite navigation signals, including: amplifying and filtering submodules, multi-stage frequency mixing submodules and analog-to-digital conversion submodules, wherein: the amplifying and filtering submodules are connected to the antenna to transmit navigation signals, and the amplifying and...

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Abstract

The invention discloses a binary offset carrier wave signal accuracy synchronization device and a method thereof. The apparatus comprises an antenna, a radio-frequency front-end processing module and a correlator. In the correlator, one input terminal of a related operator command module is connected with the radio-frequency front-end processing module so as to transmit a digital intermediate frequency navigation signal and the other input terminal of the related operator command module is connected with a local auxiliary signal generation submodule so as to transmit an auxiliary-type BOC signal. An output terminal of the related operator command module is connected with a recombination and output submodule so as to transmit result information of correlation operation. The recombination and output submodule outputs a signal correlation result without a positive side peak after the recombination. In a symmetrical pulse ambiguity removing (SPAR) technology, through using two local auxiliary signals and combining a correlation result between a receiving signal and a local signal and the correlation result between the receiving signal and another local signal, a detection standard which can completely remove the undesired side peak is constructed. Therefore, an advantage that a false capture problem can be eliminated is possessed.

Description

technical field [0001] The present invention relates to a satellite navigation technology, in particular to a device and method for precise synchronization of binary offset carrier signals, that is, SPAR (Symmetrical Pulse Ambiguity Removing) technology. Background technique [0002] Modern GPS and European Galileo satellite systems use split-spectrum type modulation signals, such as Binary Offset Carrier (BOC) signals, for better spectral separation from existing Global Positioning Satellite System (GNSS) signals, such as GPS C / A code signals . The BOC signal uses a sine-phase or cosine-phase square wave subcarrier to modulate a pseudorandom noise (PN) code. The sinusoidal phase BOC modulation signal is recorded as sinBOC(m,n), m is the square wave frequency f s For the ratio of 1.023MHz, n represents the spreading code rate f c vs. 1.023MHz. The ratio M=2m / n is called the modulation order and must be a positive integer. BOC modulation has been found to improve code tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7073G01S19/36G01S19/37
Inventor 陈佳品齐家敏陈翔李振波唐晓宁时东飞
Owner SHANGHAI JIAOTONG UNIV
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