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在无线传感器网络(WSNs)中,节点能量受限,在满足通信连接需求的前提下优化节点发送功率可以延长网络寿命。文章用端到端分组错误概率门限作为限制,对瑞利衰落环境下节点发送功率进行优化,给出最优发送功率的表达式,并考察BCH纠错编码对优化发送功率的作用,最后给出相关数值结果及仿真。结果表明:给定节点密度和端到端分组错误概率,适当选取数据速率可使发送功率最优,而采用纠错编码可进一步降低最优发送功率。
In wireless sensor networks (WSNs), nodes have limited energy and can optimize the transmission power of nodes to meet the communication requirements. The paper uses the end-to-end packet error probability threshold as the limit, optimizes the node transmit power under the Rayleigh fading environment and gives the expression of the optimal transmit power, and examines the effect of BCH error correction coding on the optimized transmit power. Finally, Related numerical results and simulation. The results show that, given the node density and end-to-end packet error probability, the optimum transmission power can be obtained by properly selecting the data rate, and the error correction coding can further reduce the optimal transmit power.