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A Method for Unambiguous Acquisition of High-Order BOC Modulated Signals

A modulation signal, no ambiguity technology, applied in the field of communication, can solve problems such as poor deblurring effect

Active Publication Date: 2020-01-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a high-order BOC modulation signal ambiguity-free capture method that solves the problem of poor de-blurring effect of the existing method under high-order modulation

Method used

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  • A Method for Unambiguous Acquisition of High-Order BOC Modulated Signals

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Embodiment Construction

[0051] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0052] Such as figure 1 As shown, the high-order BOC modulation signal ambiguity-free capture method includes the following steps:

[0053] S1. Generate a local spreading code sequence and an auxiliary sequence, and obtain a local spreading code auxiliary sequence according to the local spreading code sequence and the auxiliary sequence;

[0054] S2. Perform fast Fourier transform on the auxiliary sequence of the local spr...

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Abstract

The invention discloses a method for capturing high-order BOC modulation signals without ambiguity, which includes the following steps: S1-S2, acquiring and calculating the auxiliary sequence of the local spreading code to obtain the first conjugate data; S3, performing down-conversion on the intermediate frequency signal , Packing and Fast Fourier Transformation to obtain packing transformation data; S4, performing point multiplication, Fast Fourier Transformation and modulus operation on the first conjugate data and packing transformation data, to obtain the first modulo computation result; S5, The result of the first modulo operation is cyclically shifted to the left and right; S6, adding the two cyclically shifted sequences to obtain the added sequence; S7, obtaining the local BOC modulated baseband signal; S8, obtaining the second Two conjugate data; S9, acquiring the second modulo calculation result; S10, capturing the combination of Doppler frequency offset and code phase corresponding to the peak value greater than the threshold as the target object. The invention completes the fuzzy capture of the high-order BOC modulation signal.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for capturing high-order BOC modulation signals without ambiguity. Background technique [0002] The services provided by Global Navigation Satellite System (GNSS) have been widely used in military and civilian fields. Traditional GNSS signals use BPSK modulation. With the continuous development of navigation systems in various countries and regions in the world, the frequency bands of navigation signals are increasingly crowded, the spectrum resources are becoming more and more tense, and the same-frequency interference between systems is becoming more and more serious. In order to separate the spectrum of different navigation systems, Betz proposed binary offset carrier (binary offset carrier, BOC) modulation. The BOC modulated signal has a narrower and steeper correlation peak, which is beneficial to the receiver's anti-multipath and higher-precision tracking, thereby achi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7087H04B1/7075H04B1/707
Inventor 张亚乾顾成露林静然
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA