小波降噪技术在海上油田通信系统中的应用研究

摘要

海上油田通信网在特有的高电压、强电磁场环境下运行,受到各种外部干扰比较大,电磁频谱背景噪声严重,影响无线通信的解调性能.将小波降噪技术引入到电力无线通信系统,可对信号进行降噪处理,在强噪声背景下提取微弱信号特征,显著提升解调信噪比和信号相关度,降低相位失真度和误码率,改善电力微波通信性能.计算机仿真和分析验证了该算法的有效性.%Offshore communication net system works in its special high voltage and strong electromagnetic field,seriously affected by various kinds of external interference,the background noise of EM spectrum behaves critical,which obviously weakens wireless communication demodulation performance.In this paper,the wavelet de-noising algorithm is introduced into Offshore wireless communication system,extract weak signal characteristics on the background of strong EM noise,substantially enhance the demodulation SNR and signal relevance,reduce phase distortion and bit error rate,improve power wireless communication performance.The effectiveness of the algorithm is verified by computer simulation and analysis.