Programmable complex filter, GNSS system chip and radio frequency receiver

A complex filter and filter technology, applied in radio wave measurement systems, transmission systems, receiver monitoring, etc., can solve the problems that radio frequency receivers cannot meet the diversity requirements, and achieve simple structure, strong practicability, and flexibility Good results

Pending Publication Date: 2022-01-04
VERISILICON MICROELECTRONICS SHANGHAI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a programmable complex filter, a GNSS system chip and a radio frequency receiver to solve the problem that the radio frequency receiver in the prior art cannot meet the diversity requirements

Method used

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  • Programmable complex filter, GNSS system chip and radio frequency receiver
  • Programmable complex filter, GNSS system chip and radio frequency receiver
  • Programmable complex filter, GNSS system chip and radio frequency receiver

Examples

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Embodiment 1

[0063] figure 1 It is a schematic diagram of the digital processing unit 301301 of the programmable complex filter of the present invention, figure 2 It is a schematic diagram of the principle structure of the programmable complex filter of the present invention, combined below figure 1 and figure 2 The technical solution of the programmable complex filter of the present invention is described.

[0064] A programmable complex filter, the programmable complex filter supports zero intermediate frequency mode and low intermediate frequency mode, the programmable complex filter includes a transimpedance amplifier module 10, a complex filter module 20 and an RC calibration module; the The input terminal of the transimpedance amplifier module 10 is connected to the intermediate frequency differential current signal, and the intermediate frequency differential current signal is converted into a noise intermediate frequency differential voltage signal, and the noise intermediate f...

Embodiment 2

[0124] The present invention also provides a GNSS system chip. The GNSS system chip includes a filter, and the filter is the above-mentioned programmable complex filter. The specific structure and function of the programmable complex filter have been detailed in the first embodiment above. introduction, and will not be repeated here.

Embodiment 3

[0126] The present invention also provides a radio frequency receiver, such as Image 6 The schematic structure diagram of the radio frequency receiver is shown, and the radio frequency receiver includes:

[0127] a local oscillator for providing a local oscillator signal;

[0128] Two mixers, the input end of each mixer is connected to the radio frequency signal and the local oscillator signal, and is used to convert the radio frequency signal into two channels of the intermediate frequency differential current signal;

[0129] The programmable complex filter is the programmable complex filter mentioned above.

[0130] In this embodiment, the specific structure and functions of the programmable complex filter have been introduced in detail in the first embodiment above, and will not be repeated here.

[0131] In the radio frequency receiver of the present invention, for the intermediate frequency differential current signal generated by the mixer, the programmable complex f...

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Abstract

The invention provides a programmable complex filter, a GNSS system chip and a radio frequency receiver. The programmable complex filter supports a zero intermediate frequency mode and a low intermediate frequency mode. The programmable complex filter comprises a trans-impedance amplifier module, a complex filter module and an RC calibration module. The trans-impedance amplifier module converts the intermediate frequency differential current signal into a noise intermediate frequency differential voltage signal; The complex filter module is used for filtering interference signals in the noise intermediate frequency differential voltage signals, so that the intermediate frequency differential voltage signals can be output in a zero intermediate frequency mode or a low intermediate frequency mode; the RC calibration module comprises an analog processing unit and a digital processing unit and is used for controlling the switching state of the resistance-capacitance array unit according to the switching signal and the clock signal; when the switch state is closed, the programmable complex filter supports a low-intermediate frequency mode; when the switch state is off, the programmable complex filter supports a zero intermediate frequency mode. The invention has the characteristics of high integration level and flexible and configurable mode.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a programmable complex filter, a GNSS system chip and a radio frequency receiver. Background technique [0002] The Beidou satellite navigation system is a global satellite navigation system independently developed and manufactured by China. It is a global satellite navigation system independently built and operated by China focusing on the needs of national security and economic and social development. It provides all-weather, all-time, high-precision National important space-time infrastructure for positioning, navigation and timing services. It is a member of the Global Navigation Satellite System, which also includes the US Global Positioning System (GPS), the European Union's Galileo satellite navigation system, and Russia's GLONASS satellite navigation system (GLONASS). Among them, the Beidou satellite navigation system should be the third mature satellite navigation sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02H04B1/16H04B17/21G01S19/42
CPCH03H17/0248H04B1/16H04B17/21G01S19/42
Inventor 郭昶孟凡振王胜磊曾毅钱哲弘
Owner VERISILICON MICROELECTRONICS SHANGHAI
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