Abstract
Bandpass sampling can be used for direct down-conversion without analog mixers. In this paper, we present an efficient method to find the ranges of valid bandpass sampling frequency for direct downconverting multiple single-side-band (SSB) RF signals (complex RF signals). The algorithm results in the formulas for the ranges of valid bandpass sampling frequency are in terms of bandwidths and frequency edges of the SSB RF signals. Compared to real bandpass sampling, the valid sampling frequency ranges of complex bandpass sampling are easier to find and the ranges thus obtained having much wider interval than those of real sampling.
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