2012
DOI: 10.1049/el.2012.0533
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Multi-stage noise band cancellation ΣΔ modulator for digitisation of distorted signals

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Cited by 8 publications
(5 citation statements)
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“…Subsampling the equations update allow to reduce the processing rate of the system. Moreover, the subsampling of the signals can be done seamlessly considering that the signal is provided by a parallel subband Σ∆ ADC [8], [12]. Indeed, the output of each modulator-path in charge of the digitization of one subband will have to be processed by decimation-filters.…”
Section: Subsampled Subband Dpd Systemmentioning
confidence: 99%
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“…Subsampling the equations update allow to reduce the processing rate of the system. Moreover, the subsampling of the signals can be done seamlessly considering that the signal is provided by a parallel subband Σ∆ ADC [8], [12]. Indeed, the output of each modulator-path in charge of the digitization of one subband will have to be processed by decimation-filters.…”
Section: Subsampled Subband Dpd Systemmentioning
confidence: 99%
“…This type of ADC would provide to the digital processing block several subband data streams with reduced sampling rates. The MSNBC Σ∆ architecture [8], [9] has been proposed to digitize the distorted output signals of PAs.…”
Section: Introductionmentioning
confidence: 99%
“…In order to relax design constraints of the feedback path, some DPD approaches focus on limiting the feedback bandwidth [2] [3] at the cost of significant processing resources. An alternative approach presented in [4] digitizes the signal in subband which relaxes the analog-to-digital converter (ADC) design and enables the digital processing to operate at lower frequencies.…”
Section: Introductionmentioning
confidence: 99%
“…Sigma Delta (Σ∆) modulators can be advantageously used for this subband approach thanks to their ability to digitize bandpass signals without additional mixers and costly filters while minimizing power consumption. The multistage noise band cancellation (MSNBC) ADC has been proposed to optimize the ADC structure to the DR requirements [4]. A discretetime implementation of this ADC for WCDMA signals was presented in [5].…”
Section: Introductionmentioning
confidence: 99%
“…Bandpass Sigma Delta (Σ∆) modulators are by definition well suited to implement frequency band decomposition [2], [4]. The multi-stage noise band cancellation (MSNBC) Σ∆ architecture is a parallel ADC architecture working with subbands of the signal and is suitable for the conversion of distorted signals output by power amplifiers [7], [6]. The advantage of this architecture is that the signal is converted by parallel bandpass Σ∆ modulators and the secondary digitizing paths are not affected by the high power in the main subband.…”
Section: Introductionmentioning
confidence: 99%