Two-Level HARQ for Turbo Coded Cooperation: System Retransmission Gain and Optimal Time Allocation

Provided by: Chalmers University of Technology
Topic: Mobility
Format: PDF
Hybrid Automatic Repeat reQuest (HARQ) is a well-known technique for improving system throughput and link performance of wireless communication systems, including cooperative communication systems. In this paper, the authors exploit the limited feedback applied to the two-source turbo coded cooperation scheme to define a particular cooperative HARQ protocol, called two-level HARQ, where the decision on retransmission at each node is conditioned by two levels: first by the feedback from the destination and second by the feedback from the partner node.

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