Multi-mode satellite navigation receiving radio frequency front end chip

Abstract

The invention provides a framing method of the receiver front-end of multimode satellite navigation, which discloses a frontend chip of the receiving RF of multimode satellite navigation which is applicable to a plurality of satellite navigation systems. The method of the invention comprises six modules which are a multimode PF frontend low-noise amplifier / mixer group of monolithic integrated and completed type, a reconfigurable image rejection filter, a band-variable gain amplifier, an analog-to-digital converser, a configurable frequency synthesizer and a multimode control logic module. The reconfigurable module can realize the distribution of functional parameters according to the requirement through the multimode control logic management, causing the working performance to be optimized and meeting the functional requirement on the RF front end of the receiving platform of multimode satellite navigation. The framing method of the invention requires no external supporting accessories and has the advantages of being easy to carrying out cascade connection with preceding and backward stages, high gain, small noise coefficient and good integration. The invention is applied to the current communication and navigation positioning equipment for receiving multimode satellite navigation signals, has a wide application range and quite remarkable economic benefit, is largely on demand, supports the integration making use of multimode satellite navigation positioning information, improves positioning precision and has large social benefit.

Description

technical field [0001] The invention belongs to the technical field of wireless communication electronics, and relates to a radio frequency front-end chip for receiving satellite navigation signals, in particular to a multi-mode satellite navigation receiving radio frequency front-end chip applicable to various satellite navigation systems. Background technique [0002] There are two main systems of global satellite navigation and positioning systems in operation in the world: one is the GPS system of the United States, and the other is the GNONASS system of Russia. Europe has also proposed the Galileo global satellite positioning plan with its own characteristics. And our country is also building its own satellite positioning system. Therefore, the future global satellite positioning system will present a multi-system coexistence situation. With the rapid development of information technology and the increasing demand for information, users urgently need to use the resour...

AI Technical Summary

Problems solved by technology

However, most current satellite navigation systems are based on a single satellite navigation system and do not have the ability to support simultaneous reception of multiple satellite navigation system signals. The front-end chip based on a single satellite navigation system can receive and process signals from other modes of satellite navigation positioning systems not compatible

[0004] figure 1 Shown is the basic module architecture of the traditional satellite navigation receiving front-end chip. The input signal of the traditional structure must be transmitted through the active antenna, and an off-chip low-noise amplifier and RF filter are required. The off-chip RF filter usually adopts passive The LC structure is not only complicated to design and debug, but also difficult to realize the front-end reception and processing of multi-satellite navigation signals

The traditional front-end chip adopts a complex architecture of on-chip and off-chip modules. The size and power consumption of the entire front-end device are large, which directly limits its application to modern communication and navigation products.

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