Agile Bandpass Sampling RF Receivers for low power Applications

Abstract : New wireless communications pushes the development in terms reconfigurable, multistandards and low power radio systems. This work proposes and design new receiver architecture capable of addressing these aspects. The Bandpass Sampling (BPS) is applied and permits to exploit a certain number of advantages linked to the discrete time (DT) signal processing, notably filtering and decimation, relaxing the ADC constraints and keeping the multi standard and reconfigurable features. A developed wide band system level simulation tool and system design method permit to overcome system level limitations such spectral aliasing, separating the different contributions on the SNDR degradation, splitting the blocks constraints and defining the optimum frequency plan and filtering. The proposed BPS architecture on the thesis is a result of a quantitative comparison of different BPS architectures, applying the system design method and tool, and represents the best trade-off between power consumption and agility on the aimed context. The DT filtering block is identified as critical block. Effects such parasitic capacitances and capacitance mismatch, switch noise, finite gain OTA, are evaluated through VHDL-AMS modelling. It is observed the robustness of discrete time oriented circuits. Finally, phase noise specifications are given considering that frequency synthesis circuits may represent up to 30% of the power consumption. For that goal, a new numerical method is proposed to evaluate the signal to jitter distortion ratio SDjR on the BPS process. Moreover, a non intuitive conclusion is given, where reducing the sampling frequency does not increase the constraints in terms of jitter. The proposed architecture is in stage of circuit level design for proof of concept.
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Submitted on : Tuesday, February 14, 2012 - 5:28:25 PM
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  • HAL Id : tel-00670162, version 1

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Luis Lolis. Agile Bandpass Sampling RF Receivers for low power Applications. Micro and nanotechnologies/Microelectronics. Université Sciences et Technologies - Bordeaux I, 2011. English. ⟨tel-00670162⟩

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