Energy efficiency (EE),which is an important per- formance indicator as well as spectral efficiency (SE),has drawn increasing attention for the future wireless network design due to the explosive growth of energy *** ...
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ISBN:
(纸本)9781467321006
Energy efficiency (EE),which is an important per- formance indicator as well as spectral efficiency (SE),has drawn increasing attention for the future wireless network design due to the explosive growth of energy *** this paper,we investigate the relationship between EE and SE in two-way multiple relays system with analognetwork *** the quality-of-service (QoS) of two transceivers and transmit power constraints of each node,a fundamental EE-SE tradeoff relationship is set up for the first time in two-way multiple relay *** we prove that EE is a strictly quasi-concave function,which will have a global ***,the iterative algorithm is proposed to search the optimal bidirectional SE for the maximum EE with all condition *** practical system,other factors will also change the fundamental tradeoff relationship between EE and SE,which is also analyzed in this *** Monte-Carlo simulation is provided to demonstrate the validity of our theoretical analysis.
Recently, the ideas of wireless networkcoding (NC) has significantly enriched the area of wireless cooperation/relaying. They bring substantial gains in spectral efficiency mainly in scenarios with two-way relaying. ...
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ISBN:
(纸本)9781457720536
Recently, the ideas of wireless networkcoding (NC) has significantly enriched the area of wireless cooperation/relaying. They bring substantial gains in spectral efficiency mainly in scenarios with two-way relaying. Inspired by the ideas of wireless NC, recently we have proposed techniques for coordinated direct/relay (CDR) transmissions. Leveraging on the fact that the interference can be subsequently canceled, these techniques embrace the interference among the communication flows to/from direct and relayed users. Hence, by allowing simultaneous transmissions, spectral efficiency is increased. In our prior work, we have proposed CDR with Decode-and-Forward (DF) relay in two scenarios. In this paper, we extend the two existing regenerative CDR schemes and proposed for the other two scenarios such that all schemes benefit from the aforementioned principle of containing the interference. The parameters in the schemes are optimized to have the largest rate region or the highest sum-rate. Numerical results show that DF CDR is better than the reference scheme and almost better than AF CDR.
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