Channel polarization

Binary erasure channel

	00	0?	01	?0	??	?1	10	1?	11
00	$(1-\epsilon )^{2}$	$\epsilon (1-\epsilon )$		$\epsilon (1-\epsilon )$	$\epsilon ^{2}$
01					$\epsilon ^{2}$	$\epsilon (1-\epsilon )$		$\epsilon (1-\epsilon )$	$(1-\epsilon )^{2}$
10
11