Soft Decode and Forward Improves Cooperative Communications
نویسندگان
چکیده
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. In particular, an encoding technique which uses soft values to incorporate reliability information is proposed. The resulting Soft-DF relay can be seen as an analog signal-to-noise ratio enhancer. Simulations show that this Soft-DF scheme outperforms both AF and DF.
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