Putting the "FLEX" in flexible mobile wireless radios - A wideband continuous-time baudpass sigma-delta ADC software radios |
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Authors: | Ana Rusu Boxian Dong Mohammed Ismail |
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Affiliation: | Sch. of Inf. & Commun. Technol., R. Inst. of Technol., Stockholm; |
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Abstract: | This article has provided a brief overview of the SigmaDelta ADC conversion technologies for SDRs. The wireless receiver challenges were identified, the ADC design considerations and SigmaDelta solutions were discussed, and a low-distortion CT BP SigmaDelta modulator architecture was presented. The article has shown that the proposed CT BP SigmaDelta modulator is suitable for implementing high-IF ADC, making possible the software radio in handhelds. The major challenges in implementing such a high-IF ADC are the power dissipation and the degree of configurability, programmability, and adaptability that can be achieved by applying digital tuning and adaptive calibration |
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