For the performance degradation problem of target azimuth estimation method based on frequency domain compressed sensing
the complex domain signal was obtained via complex analytical transformation of the array pickup data
and the complex domain sensing matrix and measured value were constructed after the time delay compensating
correlation and accumulation processing of each channel data. Then
the spatial spectrum was synthesized through the compressed sensing method in complex domain
and the target azimuth estimation value was obtained. The processing results of numerical simulation and measured data show that
for the same detection probability and compared with frequency domain compressed sensing
the demand of input signal to noise ratio of this method was reduced by nearly 10lg
M
dB (
M
is the channel number of array)
and the ability of weak target detection was enhanced.
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Keywords
references
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