BOC (Binary Offset Carrier) signal acquisition method and baseband synchronous receiver

A signal acquisition and baseband technology, applied in the field of satellite navigation and positioning, can solve the problems of sacrificing BOC signals and narrow correlation characteristics, and achieve the effects of short baseband synchronization time, low false capture rate and high sensitivity

Active Publication Date: 2018-07-06
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a BOC signal acquisition method, a computer-readable storage medium and a baseband synchronous receiver, aiming to solve the problem of the receiver that can eliminate the synchronization ambiguity of the BOC signal in the prior art, but sacrifices the narrow correlation characteristic of the BOC signal merit question

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  • BOC (Binary Offset Carrier) signal acquisition method and baseband synchronous receiver
  • BOC (Binary Offset Carrier) signal acquisition method and baseband synchronous receiver
  • BOC (Binary Offset Carrier) signal acquisition method and baseband synchronous receiver

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Embodiment 1

[0033] see figure 2 , the BOC signal capture method provided in Embodiment 1 of the present invention includes the following steps: It should be noted that if there are substantially the same results, the BOC signal capture method of the present invention does not use figure 2 The flow sequence shown is limited.

[0034] S101. Receive a BOC intermediate frequency signal.

[0035] BOC intermediate frequency signal r IF (t) can be expressed as:

[0036]

[0037] in, is the signal amplitude, d(t) is the navigation message with a level value of ±1, f IF is the intermediate frequency, θ is the initial carrier phase, τ is the delay code phase, N n with mean zero and variance σ 2 Gaussian white noise, S BOC (t) is BOC code, represents the product of pseudo code and square wave subcarrier, namely:

[0038] the s BOC (t)=c(t)*sign(sin(2πf sc t))

[0039] S102. Mix the BOC intermediate frequency signal with a local carrier in an orthogonal demodulation manner to perform...

Embodiment 2

[0081] Embodiment 2 of the present invention provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the BOC signal acquisition method as provided in Embodiment 1 of the present invention is implemented. step.

Embodiment 3

[0083] Figure 7 A specific structural block diagram of a baseband synchronous receiver provided in Embodiment 3 of the present invention is shown. A baseband synchronous receiver 100 includes: a processor 101, a memory 102, and one or more computer programs, wherein the processor 101 and The memory 102 is connected by a bus, the one or more computer programs are stored in the memory 102, and configured to be executed by the one or more processors 101, and the processor 101 executes the computer The program is the steps to implement the BOC signal acquisition method provided in Embodiment 1 of the present invention.

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Abstract

The invention is applicable to the technical field of satellite navigation and positioning, and provides a BOC (Binary Offset Carrier) signal acquisition method and a baseband synchronous receiver. The method comprises steps: BOC intermediate frequency signals are received; a quadrature demodulation mode is adopted to mix the BOC intermediate frequency signals with local carriers for carrier stripping, and baseband BOC signals are obtained; according to the modulation order N of the baseband BOC signals, a pseudo random noise (PRN) code generated by a local pseudo code generator is subjected to signal decomposition to obtain N sub PRN codes; a first sub PRN code and an Nth sub PRN code are taken out to be divided to two paths to be correlated with a baseband BOC signal branch to obtain a sub mutual-correlation branch, and through reconstructing the sub mutual-correlation branch, non-coherent integration is carried out to obtain an acquisition result. The structure is simple, the erroracquisition rate is low, the sensitivity is higher, quick BOC acquisition can be completed, a BOC signal autocorrelation side peak can be eliminated basically, and the BOC signal narrow correlation characteristics are kept.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation and positioning, and in particular relates to a BOC signal acquisition method and a baseband synchronous receiver. Background technique [0002] With the birth and development of the world's major navigation systems, as well as military and civilian applications, navigation signals with different modulation methods need to share the same frequency band; while urban buildings are developing, navigation signals are required to have certain anti-multipath performance to ensure positioning accuracy. Because the signal energy of the BOC (Binary Offset Carrier, binary offset carrier) modulated signal is mainly distributed on both sides of the center frequency, it can be well compatible with the BPSK (Binary Phase Shift Keying, binary phase shift keying) signal, and the correlation of BOC Compared with the BPSK signal, the main peak of the peak is steeper, which has better anti-multipath pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/29G01S19/30
CPCG01S19/29G01S19/30
Inventor 符强陈孝倩孙希延纪元法程雷雷正强
Owner GUILIN UNIV OF ELECTRONIC TECH
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