In this paper based on the study of time-space-variant characteristics of ocean sound Channel, the channel response function is found by adaptive filtering. The obtained channel′s response function is applied to matc...In this paper based on the study of time-space-variant characteristics of ocean sound Channel, the channel response function is found by adaptive filtering. The obtained channel′s response function is applied to match the channel and satisfactory effect is shown. In the case of time-invariant channel the key problem is how to increase the convergent speed of adaptive match algorithm. For this purpose, besides using an adaptive step size factor and performing adaptive filtering in the filtering in the frequency domain, a rational selection of the weight parameters (the number of weights and the time relationship between the weights) is proposed.The result shows that under the condition of rational selection of the weight parameters a complicated response function of the channel can be expressed by a limited number of weights.展开更多
文摘In this paper based on the study of time-space-variant characteristics of ocean sound Channel, the channel response function is found by adaptive filtering. The obtained channel′s response function is applied to match the channel and satisfactory effect is shown. In the case of time-invariant channel the key problem is how to increase the convergent speed of adaptive match algorithm. For this purpose, besides using an adaptive step size factor and performing adaptive filtering in the filtering in the frequency domain, a rational selection of the weight parameters (the number of weights and the time relationship between the weights) is proposed.The result shows that under the condition of rational selection of the weight parameters a complicated response function of the channel can be expressed by a limited number of weights.
