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Intermediate-short wave spread-spectrum radio-navigation positioning system

A radio navigation and positioning system technology, applied in the field of medium and short wave spread spectrum radio navigation and positioning, can solve the problems of poor anti-interference ability, low measurement accuracy, weak confidentiality, etc.

Inactive Publication Date: 2009-12-02
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings of poor anti-interference ability, weak confidentiality and low measurement accuracy in the existing radio navigation system, the present invention proposes a medium and short wave spread spectrum radio navigation and positioning system

Method used

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  • Intermediate-short wave spread-spectrum radio-navigation positioning system
  • Intermediate-short wave spread-spectrum radio-navigation positioning system
  • Intermediate-short wave spread-spectrum radio-navigation positioning system

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specific Embodiment approach 1

[0016] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment, the medium and short wave spread spectrum radio navigation device in this embodiment is made up of transmitting base station and navigation receiver distributed in N different known positions, wherein N≥4; Described transmitting base station is made up of information coder 1. Composition of modulation device 2, filter 3 and power amplifier 4; navigation receiver consists of preamplifier 5, radio frequency processing module 6, capture and tracking device 7, observation quantity extraction module 8, information demodulator 9 and position calculation module 10 components; the information encoder 1 sends the decoded information data d(t) to the modulation device 2;

[0017] Modulation device 2 is made up of spread spectrum modulator 2-1, PN code generator 2-2, carrier modulator 2-3, carrier generator 2-4; d The binary data flow form d(t) is sent to the spread spectrum modulator 2-1,...

specific Embodiment approach 2

[0022] Specific implementation mode two: combination figure 1 and figure 2 Describe the present embodiment, the acquisition tracking device 7 in the present embodiment is made up of PN code acquisition tracking device 7-1 and carrier tracking device 7-2; Carry out the tracking of the carrier by the carrier tracking device 7-2 again, after the carrier signal is stable, the observation quantity extracting module 8 extracts and obtains the time difference τ between the transmitting base station tracking signals in pairs ij , and at the same time demodulate the location information of the N transmitting base stations through the information demodulator 9 . Other compositions and connection methods are the same as those in Embodiment 1.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination figure 2 and image 3 Describe this embodiment, the difference between this embodiment and the specific embodiment two is that the PN code capture tracking device 7-1 is made up of a pseudo code capture circuit 7-1-1 and a pseudo code tracking circuit 7-1-2; the pseudo code capture circuit The information captured by 7-1-1 is transmitted to the pseudocode tracking circuit 7-1-2. Other compositions and connection methods are the same as those in the second embodiment.

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Abstract

The medium and short wave spread spectrum radio navigation and positioning system relates to the radio field, and it solves the shortcomings of poor anti-interference ability, weak confidentiality and low measurement accuracy existing in the existing radio navigation system. It sends the decoded information data to the modulation device through the information encoder of the transmitting base station; the analog signal obtained after modulation passes through the filter and the power amplifier to form radio waves that continuously radiate outward; the N radio waves received by the navigation receiver The signal after the wave is amplified, where N≥4; and then converted into an intermediate frequency signal by the radio frequency processing module, and transmitted to the capture and tracking device, the observation extraction module and the information demodulator extract and check the information data in the capture and tracking device respectively, Transfer to the position calculation module to complete the position calculation. It can effectively suppress interference, has high reliability, adopts correlation capture, carrier tracking, and has high positioning accuracy, which can meet the needs of high-precision positioning in the region, and improves the range of navigation and positioning.

Description

technical field [0001] The invention relates to the field of radio, in particular to the field of mid-short wave spread spectrum radio navigation and positioning. Background technique [0002] With the development of science and technology, radio navigation systems are more and more appearing in people's daily life. Existing radio navigation systems are mainly divided into two types; one is satellite navigation systems, such as GPS, GLONASS, and GALILEO; the other is pulsed radio navigation systems, such as Roland C, Taika, and Omega. The signal of the satellite navigation system is very weak, and it is easily interfered by signals such as commercial VHF radio and over-the-horizon radar, and its regional navigation and positioning accuracy is not high, the system construction cost is high, the satellite itself is vulnerable and the ground monitoring system is huge; pulse The anti-jamming ability, security performance and positioning accuracy of the pulse radio navigation sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/14G01S1/02G01S11/02
Inventor 沈锋郝燕玲徐定杰韦金辰王伟黄平薛冰
Owner HARBIN ENG UNIV
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