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Mobile receivers can benefit from an increased spatial diversity through cooperation. Two relaying techniques are typically used: either Amplify and Forward (AF) or Decode and Forward (DF). This contribution presents a new technique which combines the main advantages of both AF and DF. This technique amounts to a DF scheme where all operations are performed in a soft-input soft-output fashion. The relay performs a soft decoding of the received signal and reencodes it softly, that is incorporates reliability information about the decoded data. Simulations show that this Soft-DF scheme outperforms both AF and DF.
3G and Beyond, 2005 6th IEE International Conference on
Date of Conference: 7-9 Nov. 2005