Université Pierre Et Marie Curie (Paris Vi)

Julien Denoulet

Olivier Romain

Bruce Denby

In the receive subsystem, the analogue-to-digital converter () works on the output of the low-noise amplifier (), at a chosen rate (F), which corresponds to a bandwidth sampling. The processing stages comprise a custom circuit (), with * an input memory () arranged to contain N successive digital samples, renewed at the chosen rate in blocks of M samples, * a complex digital low-pass filtering function (), of chosen cut-off frequency, operating on the input memory to supply N filtered digital samples (), * an M-periodic summing function () on the N filtered digital samples, supplying M filtered and summed digital samples (), * an M'M discrete Fourier transform stage (), operating on these M filtered and summed digital samples, the digital signals on the M outputs () of the Fourier transform representing M separate channels, of width defined by the cut-off frequency of the abovementioned low-pass filter.

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Noisy Le Grand, France

Julien Denoulet