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This paper proposes a Cross Spectral-Total Least Square (CS-TLS) method to measure the frequencies of the weak signal in colored noise, which clears the fake peaks caused by spectral estimation and overcomes efficiently. These false peaks are caused by the extended-order of the characteristic equation. Thus false peaks are hard to distinguish from the harmonic signal peaks in power spectrum curves...
In this paper, a cross fourth order moment minimum norm approach is proposed to achieve multi-path chirp time delay estimation. Because chirp signals are nonstationary, we define a special time-varying cross fourth order moment. Using this time-varying fourth order moment, the time delay estimation of the nonstationary chirp signals is converted into the parameter estimation of stationary signals...
This paper studies the effects of cross-terms in the local polynomial periodograms (LPP) by defining and examining the cross local polynomial periodogram (CLPP) and the time-frequency correlative coefficients (TFCC). Our observations show that the cross-terms of signal components can be ignored if they do not intersect and the window length used in the LPP is sufficient. In addition, the TFCC is useful...
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