Research for the Dynamic Range and Its Extension of Digital Intermediate Frequency Receiver |
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| Authors: | CAO Peng QI Wei and FEI Yuan-chun |
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| Affiliation: | School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081,China;School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081,China;School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081,China |
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| Abstract: | For the optimization of dynamic range and bandwidth of digital intermediate frequency receiver(DIFR), main factors affecting them and their relationships are studied. Firstly, the DIFR sensitivity, bandwidth, noise factor of radio frequency (RF) analog front-end (RFAF), and processing gain of intermediate frequency(IF) sampling are analyzed. Secondly, the constraint relationship of the noise factor of RFAF, the signal-to-noise ratio of ADC and the dynamic range of DIFR are studied. The relationship between the dynamic range and the RFAF gain, and that of the extended dynamic range and the RF AGC(automatic gain control) step are educed and simulated. These results can be used as theory foundations and design references for the implementation and optimization of the large dynamic range and wideband DIFR. |
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| Keywords: | broadband sensitivity dynamic range digital intermediate frequency receivers(DIFR) |
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