【摘要】 在难以得到发射源信号的水下声场环境中,利用单水听器或单个波束的接收数据可以进行浅海信道响应的盲估计。首先运用径向高斯核时频分析方法进行源信号重构,再利用接收数据和所重构的源信号,通过高精度时延估计的WRELAX算法,估计出水声信道响应。所提出的盲估计方法经过海洋实验数据验证,估计结果准确,表明这种方法在水声领域具有广泛的应用前景。更多还原

【Abstract】 Devoted to the study of underwater blind channel estimation, this paper proposed a method combined with high precision time-delay estimation to handle channel estimation, using an emitted source signal and single/multiple hydrophones. The received signal is used for source signal reconstruction by means of signal-dependent TF distribution, in association with instantaneous frequency estimation and TF inversion. Finally the shallow-water channel estimation is achieved via WRELAX technique by use of the received signal and the estimated source signal. The results of numerical simulation and experimental test from the real data taken in a South China Sea trial have proved satisfactory. It is shown that the proposed method provides high precision underwater channel estimation.更多还原