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Signal synchronization method and system based on binary offset carrier modulation and medium

A technology of offset carrier and modulated signal, applied in the field of signal processing, to achieve the effect of good anti-multipath ability, eliminating side peaks, and ensuring reliability and security

Inactive Publication Date: 2019-03-19
HUBEI UNIV OF ARTS & SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Due to the multi-peak characteristics of BOC signals, traditional satellite signal synchronization techniques for BPSK modulation cannot be directly applied to Galileo navigation receivers

Method used

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  • Signal synchronization method and system based on binary offset carrier modulation and medium
  • Signal synchronization method and system based on binary offset carrier modulation and medium
  • Signal synchronization method and system based on binary offset carrier modulation and medium

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0032] Such as Figure 1-9 As shown, a method for synchronizing signals based on binary offset carrier modulation can be realized through a traditional receiver structure, or through a receiver parallel structure, including the following steps:

[0033] First, multiply the high-frequency BOC signal received by the antenna with the local carrier in the same direction and in quadrature, perform carrier demodulation, and convert it into an intermediate-frequency BOC signal (in order to use high-speed A / D to collect the signal for processing);

[0034] Next, the cross-correlation function of the intermediate frequency BOC signal obtained after carrier demodulation and the local PRN sequence is synt...

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Abstract

The invention discloses an algorithm for signal synchronization based on binary offset carrier modulation. The algorithm comprises the steps of carrying out carrier demodulation on a high-frequency BOC signal received by an antenna and converting the high-frequency BOC signal into an intermediate-frequency BOC signal; synthesizing the intermediate-frequency BOC signal obtained after carrier demodulation and a cross-correlation function of a local PRN sequence into a correlation function containing only one main peak through operation to realize signal synchronization. The algorithm is completely applicable to sine BOC (n, n) signals and cosine BOC (n, n) signals and different from an ASPECT algorithm which is only applicable to sin BOC (n, n) signals. By adopting the algorithm, the influence of side peaks can be completely eliminated, and great multipath resistance to medium-delay multipath signals is achieved, so that the reliability and safety of the signals are ensured.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a method for synchronizing signals based on binary offset carrier modulation. Background technique [0002] The European Space Agency (ESA, European Space Agency) is implementing and building their own global satellite navigation system (GNSS) with independent intellectual property rights, called the Galileo project, in order to overcome the US monopoly on satellite navigation. A signal known as BOC modulation was adopted by both Project Galileo and the modernization of GPS in the United States. The BOC modulated signal is based on the pseudo random sequence (PRN, pseudo random noise) modulation and continues to be modulated with subcarriers. The subcarrier has an amplitude of ±1, which is generally represented by BOC(kn,n), where k is An integer is the ratio of the subcarrier frequency to the PRN pseudo-random sequence chip period, and n represents the PRN...

Claims

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Application Information

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IPC IPC(8): G01S19/24G01S19/25
CPCG01S19/243G01S19/25
Inventor 耿煜齐家敏王正源周岳斌
Owner HUBEI UNIV OF ARTS & SCI
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