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Abstract
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| It is widely known that signals with sparse spectrums may be properly acquired when using specific sub-Nyquist sampling frequencies. This alleviates the sampling requirements in advanced acquisition systems, such as the direct-sampling solution to the software-defined radio paradigm. Unfortunately, beyond the theorem of bandpass sampling, analytical expressions for these valid sub-sampling rates are unavailable. Previously, the authors derived the analytical rules which guarantee that the minimum sub-Nyquist sampling frequency avoids aliasing. However, these equations are only valid for the restricted case of evenly-spaced equal-bandwidth multichannel systems, being useless in a broader framework with arbitrary-bandwidth channels. In this work, the general dual-band case is exhaustively analyzed. Given the channel bandwidths, the spectrum parameters which assure that the minimum sub-Nyquist frequency does not give rise to aliasing may be found. For more-than-two channels, some simple guidelines are also provided. Finally, simulation examples are shown to confirm the correctness of the deduced equations. | |
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International
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Si |
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Congress
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IEEE International Symposium on Circuits and Systems (ISCAS 2012) |
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960 |
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Place
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Seoul, Korea |
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Reviewers
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Si |
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ISBN/ISSN
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978-1-4673-0219-7 |
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Start Date
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20/05/2012 |
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End Date
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23/05/2012 |
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From page
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830 |
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To page
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833 |
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IEEE Conferencie Publications |