Presentation : The need for wideband (100 MHz) and high dynamic range (120 dB) radio astronomy receiver has led our team, in collaboration with the LESIA (http://www.lesia.obspm.fr) to develop a stacked ADCs architecture.
This architecture comprises:
- an analog frontend (AFE) which amplifies and distributes the signal over several ADCs in parallel
- a digital backend at the output of the ADC to compensate for the dynamic behavior of the AFE and select the appropriate channel.
The AFE was designed in CMOS 65 nm by our team and is now well characterized. The project follows on from this work for the design of the digital backend which is based on a digital filter (FIR) whose coefficients are computed iteratively to compensate for the dynamic behavior of the AFE.
Tasks - Tools : The first part of the project is dedicated to the study of the stacked ADCs architecture. Currently the whole architecture is described in Python code and a knowledge of the language would be appreciated even if it is not indispensable. The second part is dedicated to the digital backend and particularly to the FIR correction filter. Starting from an ideal description of this filter, it will first be necessary to study the effect of the truncation of the coefficients to end with an efficient HDL description (Verilog, VHDL) of this filter.
Contact : chadi.jabbour@telecom-paristech.fr
Site : Telecom-ParisTech
Number of students : 1 to 2