摘要
基于频移键控相干解调技术,设计了一款低功耗高可靠性的水声遥控系统。发射机发射频率为50 kHz和60 kHz的信号作为编码信号,接收机采用高Q值LC选频放大作为前级放大电路,能够有效抑制频带外噪声。接收信号经过相干解调得到编码信号,该信号经双路AD采样后,进行差值计算,得到编码信息,利用此方法,能够有效降低解调误码率,提高通信的可靠性。水声通信信道复杂,多径效应明显,文章通过增加保护时间的方法,抑制了多径效应造成的混响问题。接收机采用低功耗设计,整机功耗低于65 mW。试验结果表明,该水声遥控系统待机时间长,可靠性高,误码率低于1%。
Based on frequency shift keying(FSK)coherent demodulation technology,a low-power consumption and high-reliability underwater acoustic remote control system is designed in this paper.In order to effectively suppress out of band noise,the transmitting signals is designed as encoded signals with frequencies of 50 kHz and 60 kHz,and a high Q-value LC frequency-selective amplification circuit is used as the receiving pre-amplifier.The received signal is demodulated coherently to obtain the coded signal.The signal is sampled by a dual-channel AD converter,and the difference is calculated to obtain the coding information.By using this method,the demodulation error rate can be effectively reduced,and communication reliability can be improved.In addition,this article addresses the reverberation problem caused by the multipath effect by increasing the protection time.The receiver is designed for low power consumption,with overall power consumption less than 65 mW.Experimental results show that the underwater acoustic remote control system has a long standby time and high reliability,with a bit error rate of less than 1%.
作者
解鹏飞
王家恒
焦海波
何荣昌
XIE Pengfei;WANG Jiaheng;JIAO Haibo;HE Rongchang(Hangzhou Applied Acoustics Research Institute,Hangzhou 311400,Zhejiang,China)
出处
《声学技术》
北大核心
2025年第4期515-521,共7页
Technical Acoustics
关键词
水声通信
水声遥控
频移键控
低功耗
相干解调
underwater acoustic communication
underwater acoustic remote control
frequency shift keying
lowpower consumption
coherent demodulation
