【摘要】 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。更多还原

【Abstract】 Cooperative diversity and selection diversity can be used to improve energy efficiency in wireless sensor networks.A diversity algorithm called the node selection-space-time block coding algorithm was developed to enable cooperation between a large number of nodes by using space time coding and by selecting the appropriate transmit and receive nodes.A generalized node selection algorithm was developed to relate the transmission energy consumption and the circuit energy consumption.The algorithm builds on the merits of various schemes to develop an energy efficient scheme.Simulations show that the diversity algorithm and the node selection algorithm together effectively improve energy efficiency which will prolong the lifetime of wireless sensor networks.更多还原