Radio frequency receiver of eight-frequency-point multi-mode satellite navigation system

A technology of satellite navigation system and radio frequency receiver, applied in the direction of satellite radio beacon positioning system, radio wave measurement system, measurement device, etc., can solve the problem that the GPS accuracy cannot have a long-lasting and stable guarantee, and achieve easy chip integration, The effect of reducing the number of circuits and optimizing performance

Active Publication Date: 2015-04-01
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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Problems solved by technology

The positioning accuracy of civilian GPS can also reach a relatively high level, but due to various political and military reasons, the accuracy of GPS cannot have a long-lasting and stable guarantee
At present, relying on a single GPS system technol

Method used

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  • Radio frequency receiver of eight-frequency-point multi-mode satellite navigation system
  • Radio frequency receiver of eight-frequency-point multi-mode satellite navigation system
  • Radio frequency receiver of eight-frequency-point multi-mode satellite navigation system

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Embodiment Construction

[0035] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] figure 1 It is a system structure diagram of the present invention, as shown in the figure, the radio frequency signal receiving link of the present invention includes a low-noise amplifier, a power divider, a mixer, a local oscillator sounder and a corresponding band-pass filter, and an analog-to-digital conversion device. The input end of the low-noise amplifier receives an external radio frequency signal; the output end of the low-noise amplifier is divided into two paths, one path is connected to the signal input end of the resistive power divider, and the other path is connected to the output end B1 / L1 / G1; the output end B1 / L1 / G1 directly connects the RF signal to an ADC conversion chip through the RF front-end LNA circuit; the output terminals of the LTCC power divider are respectively connected to the G2 / B3 circuit and the B...

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Abstract

The invention relates to a radio frequency receiver of an eight-frequency-point multi-mode satellite navigation system. The radio frequency receiver mainly comprises a radio frequency signal receiving link and a local oscillator signal generation circuit, wherein the radio frequency signal receiving link comprises a low noise amplifier, a power splitter, a crystal oscillator, a frequency mixer and a local oscillator sound generator, as well as a corresponding band-pass filter and an analog-digital converter. By adopting the radio frequency receiver of the eight-frequency-point multi-mode satellite navigation system, the sensitivity of the radio frequency receiver is improved, the number of circuits is reduced, the area of a chip is reduced, the power consumption and the cost of the circuits are lowered, and the radio frequency receiver is easy in chip integration and can be widely applied to precise application fields such as geodetic surveying, engineering surveying, precise deformation monitoring, geodynamics study, geoidal surface refining, earthquake prediction and the like.

Description

technical field [0001] The invention relates to a radio frequency receiver, in particular to a radio frequency receiver of an 8-frequency point multi-mode satellite navigation system. Background technique [0002] At present, GPS-based satellite precision positioning technology has been widely used in geodetic surveying, engineering surveying, precision deformation monitoring, geodynamics research, geoid refinement, earthquake prediction and other precision application fields, becoming tens of thousands of units The necessary means, satellite positioning technology has replaced the conventional measurement means with its advantages of high efficiency and fast. [0003] For satellite positioning and navigation systems, accurate and effective positioning information mainly depends on the number of visible satellites. In the current GPS system, under normal circumstances, it should be able to ensure that the receiver has 7 visible satellites to provide positioning information,...

Claims

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Application Information

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IPC IPC(8): G01S19/13
CPCG01S19/33G01S19/37
Inventor 牟红兵卢艳娥洪昌萍
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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