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2008

Low complexity and fractional coded cooperation for wireless networks

9 years 3 months ago
Low complexity and fractional coded cooperation for wireless networks
Wireless networks, and especially wireless sensor networks, have complexity and energy constraints, within which they must confront the challenging wireless fading environment. In this paper, fractional cooperation is introduced, which is shown to provide energy-efficient and low-complexity diversity gains for constant energy costs per bit throughout the network. To minimize complexity, cooperation is based on demodulateand-forward, wherein the relay nodes encode demodulated, not decoded symbols. A scheme is presented for cooperative errorcontrol coding in complexity-constrained networks, using lowdensity generator-matrix codes and repeat-accumulate codes, both chosen for being simple to encode, as well as for their easily adaptable rates. It is shown that these codes, coupled with fractional cooperation, are robust to system parameters and conditions, and introduce little added complexity at the receiver, while providing excellent performance.
Andrew W. Eckford, Josephine P. K. Chu, Raviraj S.
Added 16 Dec 2010
Updated 16 Dec 2010
Type Journal
Year 2008
Where TWC
Authors Andrew W. Eckford, Josephine P. K. Chu, Raviraj S. Adve
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