. The analysis of multichannel two-dimensional random signals. nd there is almost no evidence of energy from sinusoidsujB and ujD appearing in the spectrum of the opposite channel or in the cross phase of the cross spectrum in the region where the sinusoids are located is nearlyconstant with a correct value of 1 radian. Spectrum estimates for Examples 1 and 2 were also computed using quadrant planemodels. The estimates were based on 2 x 2 regions of support for the first and secondquadrant niters. Fig. (a) shows the component SXi of the spectral matrix. Resultsfor S22 are simil
. The analysis of multichannel two-dimensional random signals. nd there is almost no evidence of energy from sinusoidsujB and ujD appearing in the spectrum of the opposite channel or in the cross phase of the cross spectrum in the region where the sinusoids are located is nearlyconstant with a correct value of 1 radian. Spectrum estimates for Examples 1 and 2 were also computed using quadrant planemodels. The estimates were based on 2 x 2 regions of support for the first and secondquadrant niters. Fig. (a) shows the component SXi of the spectral matrix. Resultsfor S22 are similar. The use of either the first of second quadrant filter alone results in aspreading of the peak in one direction. The combined estimate (Eq. ()) gives a moreaccurate result similar to that of the NSHP model. Fig. (b) shows the magnitudeand phase estimates for the cross spectrum Sl2. A similar spreading phenomenon isobserved in the magnitude estimate but the estimation of phase is correct for both theindividual and the combined spectrum estimates. 43-.
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