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Exploiting hop diversity with frequency sharing in multi-hop OFDM networks

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3 Author(s)
Li Song ; Dept. of Electron. Eng., Shanghai Jiao Tong Univ., Shanghai, China ; Meixia Tao ; Youyun Xu

We present a framework of frequency sharing in multi-hop OFDM networks. It enables simultaneous transmission of multiple hops without causing inter-hop interference. Hop diversity can then be achieved by exploiting channel frequency selectivity across active hops. Under the framework, we formulate a joint optimization problem of sub-channel assignment, power allocation, and time control. The proposed scheme is shown to achieve significantly higher spectral efficiency than hop-by-hop transmission. It also avoids the interference limiting issue incurred in full spatial reuse schemes.

Published in:

Communications Letters, IEEE  (Volume:13 ,  Issue: 12 )

Date of Publication:

December 2009

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