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Regenerative cooperative diversity with path selection and equal power consumption in wireless networks

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4 Author(s)
Jing Liu ; Dept. of Electr. & Comput. Eng., Univ. of Miami, Coral Gables, FL, USA ; Kefei Lu ; Xiaodong Cai ; Murthi, M.N.

Recently developed cooperative protocol with distributed path selection provides a simple and practical means of achieving full cooperative diversity in wireless networks. While the best path selection method can significantly improve bit error rate (BER) performance, it may cause unequal power consumption among relay nodes, which may reduce the lifetime of energy-constrained networks. A path selection method under the equal power constraint has been developed for the amplifyand- forward (AF) protocol, but there is no such method for the decode-and-forward (DF) protocol. In this paper, we develop a distributed path selection method with an equal power constraint for the DF protocol. We also analyze the BER performance of our path-selection method. Numerical results demonstrate that the proposed method can guarantee equal power consumption, while achieving full diversity as the best path selection method and providing significant performance gain relative to noncooperative communication.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:8 ,  Issue: 8 )

Date of Publication:

August 2009

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