论文信息 - Doppler estimation using time reversal mirror for underwater acoustic time-varying multipath channel

Doppler estimation using time reversal mirror for underwater acoustic time-varying multipath channel

In underwater acoustic time-varying multipath channels, the traditional block Doppler estimation algorithm performs poorly. In this paper an improved Doppler estimation algorithm using virtual time reversal mirror is proposed. The proposed algorithm automatically matches multipath time-varying channels by focusing synchronous head of two adjacent fame-signals in the time domain, then measures the frame length accurately, and then the estimate of the Doppler shift is obtained. Any communication system transmitting signal by frame can employ the algorithm without additional assisting signals, and with acceptable increase in computational cost as well. The results of the sea experiment in Qingdao show the great reliability of this algorithm, and the Doppler shift can be estimated correctly in different types of time-varying multipath channels.

Shefeng Yan | Lijun Xu | Ye Qin | Yifu Luan

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