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Digital receiver system based on special digital medium-frequency structure

A digital receiver and digital intermediate frequency technology, applied in transmission systems, multi-carrier systems, electrical components, etc., can solve problems such as unfavorable programmable logic devices, high A/D performance requirements, and complex system configuration, so as to improve the dynamic range , Eliminate local oscillator leakage, improve the effect of receiving sensitivity

Inactive Publication Date: 2011-07-13
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The receiver is realized by conventional digital intermediate frequency processing technology, and the radio frequency receiving module and digital down-conversion are realized by different dedicated chips. Use a large dynamic A / D converter to meet the dynamic requirements of the system, which requires high A / D performance

Method used

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  • Digital receiver system based on special digital medium-frequency structure
  • Digital receiver system based on special digital medium-frequency structure
  • Digital receiver system based on special digital medium-frequency structure

Examples

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Embodiment

[0042] Such as figure 1 As shown, the digital receiver system based on digital intermediate frequency technology includes a donor antenna, a radio frequency receiving subsystem, a digital intermediate frequency processing subsystem, a baseband signal processing subsystem, and a background processing subsystem. Conversion processing; the digital intermediate frequency processing subsystem realizes the conversion processing from analog IF to digital baseband I and Q, the baseband digital signal processing subsystem completes synchronization and demodulation processing, and the background processing realizes communication interface control, interface level conversion and communication with the outside world Computer interconnection, etc.

[0043] Such as figure 2 As shown, the CDMA receiver system adopting all-digital AGC includes an intermediate frequency demodulation unit and a baseband signal processing unit: the intermediate frequency demodulation unit receives an analog in...

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Abstract

The system comprises a RF receiving subsystem, an A / D converter, a digital baseband signal process subsystem, a digital down-conversion subsystem, a clock subsystem, a MCU subsystem and a frequency automatically-controlling subsystem. The output end of the RF receiving subsystem is sequentially connected to the A / D converter, digital down-conversion subsystem and the output end of the digital baseband signal process subsystem.

Description

technical field [0001] The invention relates to the technical field of wireless mobile communication wireless access, in particular to a digital receiver system and a digital signal processing method based on a digital intermediate frequency structure. Background technique [0002] Traditional digital receiver systems based on digital IF technology generally include RF receiving subsystems, digital IF processing subsystems, baseband signal processing subsystems, and background processing subsystems. The radio frequency receiving subsystem realizes the conversion and processing of signals from RF to IF; the digital intermediate frequency processing subsystem realizes data processing from analog IF to digital baseband I and Q, and the baseband digital signal processing subsystem completes synchronization and demodulation processing, and background processing realizes communication Interface control, interface level conversion and interconnection with external computers, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/06H04L27/38
Inventor 胡应添张远见罗漫江
Owner COMBA TELECOM SYST CHINA LTD
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