Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Center for Wireless Communication and Signal Processing Research, Newark, New Jersey 07102, USA.
J Acoust Soc Am. 2011 Apr;129(4):2015-25. doi: 10.1121/1.3533721.
Signal processing and communication in acoustic particle velocity channels using vector sensors are of interest in the underwater medium. Due to the presence of multiple propagation paths, a mobile receiver collects the signal with different delays and Doppler shifts. This introduces certain delay and Doppler spreads in particle velocity channels. In this paper, these channel spreads are characterized using the zero-crossing rates of channel responses in frequency and time domain. Useful expressions for delay and Doppler spreads are derived in terms of the key channel parameters mean angle of arrival and angle spread. These results are needed for design and performance prediction of systems that utilize underwater acoustic particle velocity and pressure channels.
矢量传感器在水下声传播中对声质点速度通道中的信号处理和通信很有研究价值。由于存在多个传播路径，移动接收器会以不同的延迟和多普勒频移来采集信号。这会给声质点速度通道带来一定的延迟和多普勒展宽。在本文中，利用通道响应在频域和时域的过零率来描述这些通道展宽。推导出了延迟和多普勒展宽的有用表达式，这些表达式与关键的通道参数平均到达角和角度展宽有关。这些结果对于利用水下声质点速度和压力通道的系统的设计和性能预测是必要的。
