A Random Access Memory (RAM) for communication path values) can save the reception signals ya, yb, yc and can output the reception signals in the way of properly exchanging an output order.In FIG. 3, for example, when a coding rate R is given by R=?? and N is an information length, the original information u, the coded data xa, xb, and the reception signals ya, yb are as the followings.Original In