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声传播信道的时空相关性变化主要由信道多途结构的时空变化所决定。一般深海声传播信道由于受海底底质影响小，多途结构相对较为简单，比较容易实现深海信道的修正匹配．本文利用拖曳式低频宽带大功率发射换能器，发射线性调频脉冲信号，在接收端利用拷贝相关和脉间相关处理，得出信道的时空相关性变化。由于采用了宽带长脉冲信号，经过处理后减少了噪声于抗的影响．实验结果证实：信道的时空相关性主要由信道的多途结构及其时空变化决定．信道的相干部分约占全信道的４０％．本文的实验结果对深海信道的修正匹配研究有一定参考价值。
The spatio-temporal correlation of acoustically propagated channels is mainly determined by the temporal and spatial changes of multi-channel structure. Generally, the deep-sea acoustic propagation channel is relatively small due to the influence of the sea floor and the multi-way structure is relatively simple, so that it is relatively easy to realize the correction matching of the deep sea channel. In this paper, a towed low-frequency broadband high-power transmitting transducer is used to transmit the chirp signal. At the receiving end, copy-related and inter-pulse correlation processing are used to obtain the temporal-spatial correlation of the channel. Due to the use of broadband long pulse signal, after processing to reduce the impact of noise on the resistance. The experimental results show that the spatiotemporal correlation of channels is mainly determined by the multipath structure of the channel and its temporal and spatial variations. The coherent part of the channel accounts for about 40% of the whole channel. The experimental results in this paper have certain reference value for the study of correction matching of deep sea channel.