摘要
This paper proposed a method for blind estimation of underwater channels in shallow water environment by using received data at a single hydrophone or from single beam. First, the received signal is used for source signal reconstruction by means of signal-dependent TF （Time-Frequency） distribution, in association with instantaneous frequency estimation and TF inversion. Then the shallow-water channel estimation is achieved via WRELAX technique by use of the received signal and the estimated source signal. Finally, the results of numerical simulation and experimental test from real data taken in South China Sea trial have proved satisfactory. It is shown that the proposed method is useful for underwater channel estimation.
This paper proposed a method for blind estimation of underwater channels in shallow water environment by using received data at a single hydrophone or from single beam. First, the received signal is used for source signal reconstruction by means of signal-dependent TF （Time-Frequency） distribution, in association with instantaneous frequency estimation and TF inversion. Then the shallow-water channel estimation is achieved via WRELAX technique by use of the received signal and the estimated source signal. Finally, the results of numerical simulation and experimental test from real data taken in South China Sea trial have proved satisfactory. It is shown that the proposed method is useful for underwater channel estimation.
基金
This work was supported by the National Natural Science Foundation of China(60472073)(10304015)and by the Doctor Research Foundation of Ministry of Education of China(20020699010)by the Natural Science Fundamental Research Foundation of Shaanxi province(2005F40).
