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Digital receiver system based on special digital medium-frequency structure

A digital receiver, 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 composition, to improve the dynamic range. , the effect of eliminating the leakage of the local oscillator and improving the receiving sensitivity

Inactive Publication Date: 2007-11-21
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Examples

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Embodiment

[0041] As shown in Figure 1, a 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. The radio frequency receiving subsystem implements signal slave Conversion processing to IF; digital intermediate frequency processing subsystem realizes conversion processing from analog IF to digital baseband I, Q, baseband digital signal processing subsystem completes synchronization and demodulation processing, background processing realizes communication interface control and interface level conversion And the interconnection with external computers, etc.

[0042] As shown in Figure 2, the CDMA receiver system using all-digital AGC includes an intermediate frequency demodulation unit and a baseband signal processing unit: the intermediate frequency demodulation unit receives a...

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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, and in particular to a digital receiver system based on a special digital intermediate frequency structure. Background technique [0002] The traditional digital receiver system based on digital intermediate frequency technology generally includes radio frequency receiving subsystem, digital intermediate frequency processing subsystem, baseband signal processing subsystem and background processing subsystem. The radio frequency receiving subsystem realizes the conversion processing of signals from RF to IF; the digital intermediate frequency processing subsystem realizes the data processing from analog IF to digital baseband I, Q, the baseband digital signal processing subsystem completes synchronization and demodulation processing, and background processing realizes communication Interface control, interface level conversion and interconn...

Claims

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Application Information

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Patent Type & Authority Applications(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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