论文部分内容阅读
针对WSN中虚拟MIMO传输的能量节省与均衡问题,该文提出了一种新的自适应MAC信道接入协议,该协议在每个数据包的基础上,同时调节传输方式、传输功率和调制阶数,使包括传输功耗和电路功耗的总能耗最小;分析了MAC协议中的平均误码率及信噪比与调制阶数的关系及2-天线协作MIMO传输与SISO传输的平均能耗;讨论了STC与LTC距离的取值范围,确定了相对于传统SISO节省能量的下边界距离。最后,仿真验证了A-MAC协议能有效降低网络能耗,同时吞吐量性能也得到了一定的改善,在数据采集及环境测量等方面具有一定的应用价值。
Aiming at the energy saving and equalization of virtual MIMO transmission in WSN, a new adaptive MAC channel access protocol is proposed in this paper. Based on each data packet, the protocol adjusts the transmission mode, transmission power and modulation order The total energy consumption including transmission power consumption and circuit power consumption is minimized. The relationship between the average bit error rate and signal-to-noise ratio and modulation order in MAC protocol and the average energy of 2-antenna cooperative MIMO transmission and SISO transmission The range of STC-to-LTC distance is discussed, and the lower bound distance of energy saving relative to traditional SISO is determined. Finally, the simulation verifies that the A-MAC protocol can effectively reduce network energy consumption, and throughput performance has also been improved to a certain extent. It has certain application value in data acquisition and environmental measurement.