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Fractional Cooperation using Coded Demodulate-and-Forward

Summary: Fractional Cooperation using Coded
Josephine P. K. Chu, Raviraj S. Adve and Andrew W. Eckford
Dept. of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada
Dept. of Computer Science and Engineering, York University, Toronto, Ontario, Canada
E-mail: {chuj,rsadve}@comm.utoronto.ca, aeckford@yorku.ca
Abstract-- Since the introduction of cooperative diversity,
many different implementations have been proposed to increase
the reliability and/or power efficiency of distributed networks
via relaying. One simple and flexible scheme introduced has
been coded demodulate-and-forward, where the relay only de-
modulates, instead of decodes, the received data, to create and
forward a new codeword to the destination. This reduces the
complexity of hardware as well as the energy consumption by
the relay. In this paper, we consider another flexible feature of
the coded demodulate-and-forward scheme, where the relay uses
only a fraction of its codeword to assist the source, while using the
rest of the codeword to transmit its own information. Previous
schemes have generally focused on all-or-nothing cooperation
where a relay either contributes all its resources or none at all


Source: Adve, Raviraj - Department of Electrical and Computer Engineering, University of Toronto


Collections: Engineering