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首页> 外文会议>Information Sciences and Systems, 2009. CISS 2009 >Energy-efficient modulation design for reliable communication in wireless networks
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Energy-efficient modulation design for reliable communication in wireless networks

机译：节能调制设计，可在无线网络中实现可靠的通信

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摘要

In this paper, we have considered the optimization of the M-ary quadrature amplitude modulation (MQAM) constellation size to minimize the bit energy consumption under average bit error rate (BER) constraints. In the computation of the energy expenditure, the circuit, transmission, and retransmission energies are taken into account. A combined log-normal shadowing and Rayleigh fading model is employed to model the wireless channel. The link reliabilities and retransmission probabilities are determined through the outage probabilities under log-normal shadowing effects. Both single-hop and multi-hop transmissions are considered. Through numerical results, the optimal constellation sizes are identified. Several interesting observations with practical implications are made. It is seen that while large constellations are preferred at small transmission distances, constellation size should be decreased as the distance increases. Similar trends are observed in both fixed and variable transmit power scenarios. We have noted that variable power schemes can attain higher energy-efficiencies. The analysis of energy-efficient modulation design is also conducted in multi-hop linear networks. In this case, the modulation size and routing paths are jointly optimized, and the analysis of both the bit energy and delay experienced in the linear network is provided.
机译：在本文中，我们考虑了对M元正交幅度调制（MQAM）星座图大小的优化，以在平均误码率（BER）约束下最大程度地降低位能量消耗。在能量消耗的计算中，要考虑电路，传输和重传能量。采用对数正态阴影和瑞利衰落组合模型对无线信道进行建模。链路可靠性和重传概率是通过对数正态阴影效应下的中断概率来确定的。单跳和多跳传输都被考虑。通过数值结果，可以确定最佳星座图大小。提出了一些具有实际意义的有趣观察。可以看出，虽然在较小的传输距离下最好使用大星座，但随着距离的增加，星座图的大小应减小。在固定和可变发射功率场景中都观察到类似趋势。我们已经注意到，可变功率方案可以实现更高的能源效率。节能调制设计的分析也在多跳线性网络中进行。在这种情况下，将共同优化调制大小和路由路径，并对线性网络中的比特能量和延迟进行分析。

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