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Time interleaved sigma-delta converter is a potential candidate for multi-mode wideband analog to digital (A/D) converters dedicated for multistandard receivers. However, the interpolation by zeros recquired to compress the useful signal bandwidth at the input of the sigma-delta modulator imposes constraints on the implementation of the analog part leading to a very large die area due to the high...
Uniform sampling introduces aliases due to periodic sampling instants. Therefore, in conventional receiver architecture, an Anti-Aliasing Filter (AAF) is required to suppress these aliases. The used solution to relax the AAF consists on the over-sampling technique. A promising alternate solution is to non-uniformly sample the analog signal. Indeed, Non-Uniform Sampling (NUS) has been studied since...
The radio communication tendency is to reach Software Radio applied to multistandard receiver. Non uniform sampling controlling Analog-to-Digital Converter in Homodyne multistandard receiver was previously proposed in our works. Non uniform sampling offers the advantage of alias-free sampling. This can lead to many advantages in the multistandard based non uniform sampling receiver such as, essentially,...
In previous work, a non-uniform sampling (NUS) technique to control analog-to-digital conversion (ADC) in a multistandard radio receiver was proposed. In this context of wide band radio signals, the NUS-based ADC offers the advantages of relaxing antialiasing filter (AAF) constraints, decreasing the sampling frequency average and reducing ADC dynamic power consumption. In this paper, we focus on generating...
In this paper a non-uniform sampling (NUS) technique for controlling analog-to-digital conversion (ADC) in a multistandard radio receiver is proposed. In this context of wide band radio signals, the NUS-based ADC offers the advantages of relaxing antialiasing filter constraints and decreasing the "mean" of the sampling frequency. This leads to ADC power consumption reduction. The improvement...
The IF sampling radio receiver based on the non-uniform sampling (NUS), technique is promising and would be a candidate for the multistandard reception. This technique allows the IF down-conversion and permit to eliminate or alleviate the anti-aliasing filter. For wideband and multistandards design, the choice of sampling rates for bandpass sampling is flexible. This paper introduces the NUS theory,...
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