  The characterisation of CMB polarisation is one of the next challenge in
observationnal cosmology. This is especially true for the so-called B-modes
that are at least 3 order of magnitude lower than CMB temperature fluctuations.
A precise measurement of the angular power spectrum of these B-modes will give
important constraints on inflation parameters. In this talk, I will describe
two complementary experiments, BRAIN and CLOVER, dedicated to CMB polarisation
measurement. These experiments are proposed to be installed in Dome-C,
Antarctica, to take advantage of the extreme dryness of the atmosphere and to
allow long integration time.
