A decoder structure is described that can be implemented on an integrated circuit and used to decode turbo codes. A soft input soft output decoder includes a metric aggregator, and a codeword resolver, each of these elements co-operating to resolve manipulated branch and state metric pairs to a codeword...http://www.google.es/patents/US20040153942?utm_source=gb-gplus-sharePatente US20040153942 - Soft input soft output decoder for turbo codes
