Abstract

AbstractIn the software defined radio (SDR) front end design, the radio-frequency (RF) bandpass filter is a knotty problem. To widen the passband of the RF filter is a better solution to alleviate the design challenge of RF bandpass filter. However, it will result in significantly increasing the sampling frequency in terms of the conventional bandpass sampling theory. In this paper, we propose a novel method to find the ranges of valid bandpass sampling frequency for multiband RF signals based on the bandwidth of the signal and the passband of the bandpass filter. Compared to the conventional bandpass sampling, the proposed method has more valid sampling frequency ranges and lower sampling frequencies.Keywordssoftware defined radiobandpass samplinganalog-digital conversionvalid sampling frequency

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