基于直接序列扩频的WSN通信信道均衡算法

Research on WSN communication channel equalization algorithm based on direct sequence spread spectrum

对无线传感器网络(WSN)通信信道进行均衡设计,抑制无线传感器节点之间的码间干扰,改善通信质量。提出一种基于直接序列扩频的WSN通信信道均衡算法。进行了WSN的信道模型设计,为了降低信道输出的稳态误差,采用时间反转镜为匹配滤波方法,进行多径信道的码间干扰滤波,设计自相关匹配滤波器,通过直接序列扩频方法实现WSN通信的信道均衡。仿真结果表明,采用该算法进行WSN的通信信道均衡设计,发射信号沿各个路径到达接收机的信号分量得到准确分离,信号的多径分量得到无误码接收,通信信道均衡效果较好,通信误比特率低于传统方法,改善了WSN通信质量,展示了较好的应用价值。

Wireless sensor network （WSN） communication channel is designed to balance the inter symbol interference between wireless sensor nodes ,and improve the quality of communication .A WSN communication channel equalization algorithm based on direct sequence spread spectrum is proposed .The WSN channel model is designed .In order to reduce the steady‐state error of the output of the channel ,the time reversal mirror is used as the matched filtering method ,and the inter symbol interference filter is designed .The channel equalization of WSN communication is realized by the direct sequence spread spectrum method . Simulation results show that using the algorithm for WSN communication channel equalization design and emission signals along each path arrival signal components of the receiver to get accurate separation ,signal multipath components are no bit errors at the receiver ,communication channel equalization effect better and reduce the communication bit error rate ,to improve the quality of communication of WSN ,shows a good application value .