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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 low measurement accuracy, weak confidentiality, and poor anti-interference ability.

Inactive Publication Date: 2008-07-16
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
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  • Intermediate-short wave spread-spectrum radio-navigation positioning system

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specific Embodiment approach 1

[0016] Specific embodiment one: this embodiment is described in conjunction with Fig. 1 and Fig. 2, the medium-short wave spread spectrum radio navigation device in the present embodiment is made up of transmitting base stations and navigation receivers distributed in N different known positions, wherein N≥ 4; the transmitting base station is made up of an information encoder 1, a modulation device 2, a filter 3 and a power amplifier 4; the navigation receiver is composed of a preamplifier 5, a radio frequency processing module 6, a capture tracking device 7, and an observation extraction module 8 , an information demodulator 9 and a position resolving module 10; 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) of the binary data stream is sent to the spread s...

specific Embodiment approach 2

[0022] Specific embodiment two: present embodiment is described in conjunction with Fig. 1 and Fig. 2, capture tracking device 7 in the present embodiment is made up of PN code capture tracking device 7-1 and carrier tracking device 7-2; PN code capture tracking device 7- 1. After tracking and capturing the pseudocode in the received information, the carrier is tracked by the carrier tracking device 7-2. After the carrier signal is stable, the observation quantity extraction module 8 extracts and obtains the time difference τ between the tracking signals of the transmitting base stations 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 embodiment three: this embodiment is illustrated in conjunction with Fig. 2 and Fig. 3, and the difference between this embodiment and specific embodiment two is that PN code captures tracking device 7-1 by pseudo code capturing circuit 7-1-1 and pseudo code tracking circuit 7-1-2 composition; the information captured by the pseudo code capture circuit 7-1-1 is transmitted to the pseudo code 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 invention discloses a radio navigation and location system with the spread spectrum of medium short wave, which relates to the radio field and solves the disadvantages of poor anti-interference ability, weak confidentiality and low measurement precision in existing radio navigation systems. The invention comprises the following steps: a decoded information data is sent to a modulating device by an information encoder of a transmission base station; the analog signal which is acquired from the modulation runs through a filter and a power amplifier for forming the radio waves which radiate outwards continuously; a navigation receiver receives the amplified signal of N radio waves, wherein, N is larger than or equal to 4; the amplified signal is converted into an intermediate frequency signal through the frequency conversion implemented by a radio frequency processing module and transmitted into a capturing and tracking device; an observed quantity extracting module and an information demodulator are respectively used for extracting and examining the information data in the capturing and tracking device, and the information data is then transmitted into a position computation module for implementing position computation. The invention can effectively suppress interference, has higher reliability and high location precision as the related capturing and the carrier tracking are adopted, satisfies the high-precision location requirements in a region, and enlarges navigation and location range.

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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IPC IPC(8): G01S5/14G01S1/02G01S11/02
Inventor 郝燕玲沈锋徐定杰韦金辰王伟黄平薛冰
Owner HARBIN ENG UNIV
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