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INTERPOLATION IN NON-UNIFORM SAMPLING ANALOG-TO-DIGITAL CONVERTERS
INTERPOLATION IN NON-UNIFORM SAMPLING ANALOG-TO-DIGITAL CONVERTERS
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机译:非均匀采样模数转换器的插值
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摘要
A radio frequency receiver includes an antenna that receives an analog signal comprising modulated encoded information. An analog signal generator generates a supplemental analog signal characterized by an amplitude sufficient to trigger a voltage threshold in a non-uniform sampling analog-to-digital converter. A mixer mixes the received signal and the supplemental signal. A non-uniform sampling analog-to-digital converter receives the mixed signal and produces a series of non-uniformly sampled {amplitude, time} tuples representing the mixed signal. The converter removes the supplemental signal from the series of {amplitude, time} tuples to produce a series of non-uniformly sampled {amplitude, time} tuples representative of the mixed signal without the supplemental signal. The converter interpolates the series of non-uniformly sampled {amplitude, time} tuples to form a series of samples periodic in time representative of the analog input signal. A digital signal processor (DSP) demodulates the interpolated series and decode the digital information from the demodulated series.
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