Abstract : This paper presents a new method for digitizing wideband signals. It is based on the use of parallel analog delta sigma modulators, where each modulator converts a part of the input signal band. A major benefit of the architecture is that it widens the conversion band of the input signal and increases its dynamic range. Two solutions are proposed to reconstruct the signal: the first one uses bandpass filters without demodulation and the second demodulates the signal of each modulator, and then processes it in a lowpass filter. This paper focuses essentially on the digital part of the system and the overall performances are compared by using simulation results.
https://hal-supelec.archives-ouvertes.fr/hal-00229779
Contributor : Karine El Rassi
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Submitted on : Thursday, January 31, 2008 - 12:05:40 PM
Last modification on : Thursday, March 29, 2018 - 11:06:03 AM
Long-term archiving on : Thursday, September 27, 2012 - 5:47:36 PM
