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为了有效利用协作分集和选择分集提高无线传感器网络的能量效率,通过结合空时编码和选择合适的发射、接收协作节点,提出了适合大量节点协作的节点选择空时编码算法。通过分析总能量消耗中发射能量消耗和电路能量消耗与发送距离之间的关系,提出了继承多种分集算法优点并适用于网络拓扑动态变化的广义节点选择算法。仿真表明,提出的两种空时分集算法能够有效地提高无线传感器网络的能量效率,从而延长无线传感器网络的寿命。
In order to improve the energy efficiency of wireless sensor network effectively by using cooperative diversity and selective diversity, a space-time coding algorithm for node selection suitable for a large number of nodes cooperation is proposed by combining space-time coding and selecting suitable transmitting and receiving cooperation nodes. By analyzing the relationship between transmission energy consumption and circuit energy consumption and transmission distance in total energy consumption, a generalized node selection algorithm which inherits the advantages of multiple diversity algorithms and is suitable for the dynamic changes of network topologies is proposed. The simulation results show that the proposed two space-time diversity algorithms can effectively improve the energy efficiency of wireless sensor networks and prolong the life of wireless sensor networks.