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ULA_ SNR
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Known: the signal wavelength is 2, antenna array element spacing of 1 m, fast, the number is 2000, has four air source signals, assuming that their frequency four direction of the source signals are: o: 1) under the condition of without noise, observation and calculate the covariance matrix characteristic value, and it explained the characteristics of using MUSIC algorithm 2) respectively, CAPON algorithm, ESPRIT algorithm in the following four cases, the above four estimate doa of signal source, and draw their spectra space; (1) under the condition of without noise, (2) in the case of add white gaussian noise, assume that signal-to-noise ratio of 10 db 3) changes in SNR range - 20 db ~ + 20 db, using MUSIC algorithm respectively, CAPON method, ESPRIT algorithm, the above four estimate doa of signal source, and to draw the doa estimation error, with the change of SNR curve (i.e. horizontal axis as the signal-to-noise ratio, the vertical axis is error value)
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