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

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,...

AI Technical Summary

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 technology is still difficult to meet all-round application requirements. Satellite navigation will change from the GPS era to the GNSS era, forming a multi-mode and multi-system coexistence situation. and integrity will be far better than a single system

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