摘要
矢量传感器较传统声压水听器有诸多优势,但将其应用于水声通信领域在国内外却未见有公开的文献报道.由此研究了声压和振速的联合处理获得指向性增益的方法,理论上证明在均匀加权的情况下,指向性增益为4.8dB.研究了最优权的选取方法,在最优权条件下,指向性增益为6dB.将该处理方法应用于相位调制的高速水声通信中,并结合自适应均衡算法进行相干解调和解码.建立了一套以矢量传感器为接收器的相位调制通信系统,在松花湖进行了试验研究,试验结果表明,该方法可有效地降低通信误码率,提高通信系统的作用距离.
There were almost no papers reporting that vector sensors could be used in underwater acoustic communication(UWA) systems although vector sensors have many advantages compared with the pressure hydrophone. In this paper, a jointed pressure and velocity method was studied for improving directivity gain of vector sensors. It was proved that the directivity gain of a single vector sensor was 4.8dB under the condition of uniform weights. The method was also studied for selecting optimal weights. It has been proved that directivity gain of a single vector sensor is 6dB under the condition of optimal weights. The proposed methods were applied in the high_speed UWA system of the phase modulation and coherent demodulation and decoding were done using adapt equalization algorithm. A UWA system based on a single vector sensor has been developed. The results of Songhua Lake trial show that bit error rate can be reduced and communication distance can be enlarged using the proposed method.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
2003年第6期596-599,共4页
Journal of Harbin Engineering University
基金
水声技术国防科技重点实验室基金资助项目(OOJS23 8 1
CB0104).
