Multimode parallel radio frequency receiving method and device orientated to satellite navigation system of next generator

Abstract

The invention provides a multimode parallel radio frequency receiving method, which comprises the following steps of: (1) receiving a radio frequency signal through an antenna; (2) multiplexing the same radio frequency frontend by different navigation signals; (3) passing a signal output by the radio frequency frontend through a mirror image rejection receiver structure, wherein the mirror image rejection receiver structure is divided into I/Q (In-phase/Quadrature) paths according to the difference of relative phase positions of local oscillators, the I/Q paths respectively comprise a complex filter, the mirror image multiplexing and mirror image reconstruction are realized through the complex filter, and therefore a plurality of navigation signals are received in parallel; and (4) converting respective received mode signals into digital signals. The method provided by the invention has the advantages of simple control logic and high mode multiplexing rate, and is suitable for being integrated with a single digital baseband chip; particularly, the combined navigation and navigation solution of the plurality of navigation signals can be realized through one frequency synthesizer; and the chip area and power consumption of a multimode parallel GNSS (Global Navigation Satellite System) receiver are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of radio frequency communication, and provides a multi-mode parallel GNSS radio frequency receiver oriented to a next-generation satellite navigation system. Background technique [0002] The American Global Positioning System (GPS), the Russian global satellite navigation system GLONASS, the European Galileo satellite positioning system (Galileo), and the developing China Beidou second-generation positioning system can provide global, all-weather, real-time, continuous high-precision location information, It has been widely used in the positioning, navigation, timing and precision measurement of various civilian and military targets. It is one of the three fastest-growing information industries (mobile phones, Internet and satellite positioning and navigation) in the world. [0003] In the next few years, satellite navigation applications will change from a single GPS era to a GNSS era where multiple conste...

AI Technical Summary

Problems solved by technology

In 2007, my country's first dual-system satellite positioning and navigation receiver core chip SR8824 chip with independent intellectual property rights passed the test and acceptance, which can realize the compatible reception of the Beidou first-generation system (BD-1) with communication functions and GPS. In all the published documents so far, there is no reference to "BD-2 / GPS / Galileo / GLONASS multi-mode receiver RF front-end system structure"

The domestic patent application 200810113003.0 proposes a multi-mode radio frequency receiving method for global satellite navigation systems for both military and civilian purposes. It is dedicated to the reconfigurability of civilian navigation signals and military navigation signals. It requires complex spectrum planning to complete the system indicators. Various On-chip frequency content limits system sensitivity, further refinement of spurious and power consumption levels

In 2011, at the Asian Solid State Integrated Circuit Conference, the article "A Reconfigurable Dual-Channel Tri-Mode All-Band RF Receiver for Next Generation GNSS" realized a variety of GNSS navigation dual-channel parallelism by adopting a dual-channel low-IF frequency architecture, but using Multiple RF front-ends and multiple frequency synthesizers are used. The circuit is relatively complex, the area cost is relatively large, and the power consumption is relatively high. It is not suitable for large-scale commercial promotion in the future.

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