基于自适应噪声抵消的无线传感网络信道优化
2016-09-26龙清胡光波
龙清 胡光波



摘 要:无线传感器网络通信技术广泛应用在物联网近场通信、水声通信等领域。无线传感网络通信信道受到多途干扰,导致信道失衡,需要进行信道均衡模型设计。提出一种基于自适应噪声抵消的无线传感器网络通信信道优化技术,首先构建了无线传感网络通信的信道模型,对无线传感器网络信道传播过程中衰减损失和各条路径的信号进行重组,采用自适应噪声抵消算法进行信道的多途干扰滤波,结合最小二乘(RLS)准则算法进行无线传感器网络通信信道均衡设计。仿真结果表明,采用该通信信道均衡技术能有效提高无线传感器网络通信的信道质量,降低通信传输失真和误比特率,实现信道自适应均衡,提高通信的抗干扰能力。
关键词:自适应噪声抵消;无线传感网络;通信信道;均衡
中图分类号:TN911 文献标识码:A
Abstract: Wireless sensor network communication technology is widely applied in the field of Internet of things near field communication, underwater acoustic communication, the wireless sensor network communication channel by multi-path interference and lead to an imbalance of channel, channel equalization model design. Proposed a wireless sensor communication channel based on adaptive noise cancellation optimization technique. Firstly, we build the channel model of wireless sensor network communication. The wireless sensor network communication channel in the process of decay signal loss and various paths of the reorganization, the adaptive noise cancellation algorithm for channel multipath interference filter, combined with the least square (RLS) criterion algorithm for wireless sensor communications channel equalization design. Simulation results show that using the communication channel equalization technique can effectively improve the quality of the wireless sensor network communication channel, reduce the communication transmission distortion and bit error rate, the realization of the adaptive channel equalization, the anti-interference ability to improve communication.
Keywords: adaptive noise cancellation; wireless sensor networks; communication channel; equalization
0 引言
随着通信技术的发展,通信的种类和应用领域不断扩大,通信就是通过通信介质和通信信道,将需要传输的声音、文字、数据、图像等电信号调制在无线电波上,实现数据传输。通信根据频率和波长的差异,通信大致可分为长波通信、中波通信、短波通信、超短波通信和微波通信。无线传感器网络通信是一种新型的通信方式,无线传感器网络通信是利用传感器技术,通过数据调制滤波和节点,经空间和地面传至对方的通信方式。无线传感器网络通信借助无线电波具有的波动传递信息的功能,人们可以省去敷设导线的麻烦,实现更加自由、更加快捷的通信,因此,无线传感器网络通信将在军事、民用等各个领域展现较好的应用价值[1-3]。……
