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In this paper, a frequency estimation method based on complex correlation is proposed with TIADC (time-interleaved ADC) theory. Firstly, received signal is processed by amplification, filter, and quadrature demodulation. Then, TIADC is adopted to data acquisition, and parallel operation of complex correlation is used to deal with complex signal. Finally, signal frequency is acquired with phase angle...
As the underwater acoustic channel is time-frequency variable, the synchronization plays an important role in whole communication. In this paper, the tradition signal of LFM (linear frequency modulation) is taken as the synchronization signal, and a flexible technique method to detect LFM signal are proposed with little resources. Compared to the basic one, the optimized structure uses the multiple-cycle...
In analyzing and processing the acquired sea clutter data, the spectrum is a very important characteristic. The acquired sea clutter data can be treated as a kind of nonlinear and non-stationary data. The traditional processing method, such as Fourier Transform or Wavelet Transform, etc., is not a good deal for processing it. To extract the spectrum characteristics of the acquired sea clutter data...
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