WSNs中基于旁瓣控制的协作波束形成算法

COLLABORATIVE BEAMFORMING ALGORITHM IN WIRELESS SENSOR NETWORKS BASED ON SIDELOBE CONTROL

协作波束形成(Collaborative Beam Forming, CBF)是提高无线传感网络(Wireless Sensor Networks, WSNs)能量效率的有效技术,近期受到广泛关注。为此,提出基于旁瓣控制的协作波束形成算法(Sidelobe Control-based CBF,SC-CBF)。SC-CBF算法通过测量主基站和辅基站信号强度RSS值,以迭代方式调整节点振荡器相位,使主基站的RSS值最大,辅基站RSS值低于阈值。SC-CBF算法以分布方式实现振荡器相位同步,无需全局信道状态信息,使该算法更适应于大型WSNs网络。仿真结果表明,SC-CBF算法提高了主基站RSS值,压窄了主瓣区。

Collaborative beam forming(CBF)is a promising technique aimed at improving energy efficiency of communication in wireless sensor networks(WSNs),which has attracted considerable attention in the research community recently.Therefore,sidelobe control-based CBF(SC-CBF)is proposed.SC-CBF algorithm adjusted the phase of the node oscillator in an iterative way by measuring the RSS value of the signal strength of the primary base station and the auxiliary base station,so that the RSS value of the primary base station was the maximum and the RSS value of the auxiliary base station was lower than the threshold value.The SC-CBF algorithm achieved oscillator phase synchronization in a distributed manner without the need for global channel state information,making it more suitable for large WSN networks.The simulation results show that the SC-CBF algorithm increases the RSS value of the main base station and narrows the main lobe.