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Published byBruno Short Modified over 9 years ago
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Software Defined Radios 長庚電機通訊組 碩一 張晉銓 指導教授 : 黃文傑博士
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Outline The purpose of the RF front-end Dynamic Range RF Receiver Front-End Topologies Enhance flexibility of the RF chain with software radios
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The purpose of the RF front-end Isolated the desired signal from interference and noise With minimal distortion, convert the desired signal’s center frequency to a range compatible with the ADC( non-linear distortion and noise) A dynamic range that is compatible with that of the ADC
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Dynamic Range: The principal Challenge of Receiver Design
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RF Receiver Front-End Topologies-type1 The most common types of RF front-ends are dual conversion,single conversion,and turned radio frequency receivers Sensitivity Selectivity Stability Dynamic range Spurious response
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RF Receiver Front-End Topologies-type2
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RF Receiver Front-End Topologies-type3
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RF Receiver Front-End Topologies Impact on constellation due to imperfect mixing process.
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Image Frequency problem of Heterodyne Receiver
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Enhance flexibility of the RF chain with software radios
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End Thank you for your attention
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