Increasing of coding gain of Soft Input Soft Output channel decoding

The subject of this paper is combining of Soft Input Soft Output (SISO) channel decoding and cryptographic mechanisms with some of well known procedures used in communication systems, such as interleaving, puncturing and bit stuffing. The algorithm is proposed, which enables improvement of used channel decoding by interleaving of bits known to the transmitter and the receiver, resulting in additional overall coding gain.