基于小波变换的无线局域网通信信号增强方法

Wireless LAN Communication Signal Enhancement Method Based on Wavelet Transform

信道多径效应、传输带宽有限性等因素,可导致无线局域网通信信号中存在大量的噪声,降低了通信信号质量.为此,提出基于小波变换的无线局域网通信信号增强方法.利用小波变换算法提取网络通信信号特征,分类处理无线局域网通信信号,得到信号类别;利用噪声模型与信号类别进行对比,确定带噪信号的小波系数,将小于阈值的信号视为噪声去除;重构无线局域网通信信号,实现无线局域网通信信号的增强.实验结果表明:应用提出的算法信号信噪比得到了明显提升,信号均方误差低于最低限值,充分证实提出的算法具备可行性.

Influenced by factors such as channel multipath effect and limited transmission bandwidth,there is a lot of noise in wireless LAN communication signals,which reduces the quality of communication signals.Therefore,a signal enhancement method for wireless LAN communication based on wavelet transform is proposed.The following methods are proposed,which are using wavelet transform algorithm to extract the characteristics of network communication signals and classify and process wireless LAN communication signals to obtain signal categories,comparing the noise model with the signal category to determine the wavelet coefficients of noisy signals,with the signals less than the threshold being regarded as noise removal and reconfiguring WLAN communication signals to enhance WLAN communication signals.Experimental results show that after the application of the proposed algorithm,the signal-to-noise ratio is obviously improved,and the mean square error of the signal is lower than the minimum limit,which fully proves the feasibility of the proposed algorithm.