A Method of Multi-antenna Spatial Spectrum Sensing Based on Noncircular Signals

According to different dimensions, spectrum holes can be divided into time-domain, frequency-domain holes and spatial-domain holes. Spectrum holes of different dimensions require corresponding spectrum sensing methods. For the spectral holes in the spatial domain, it is proposed a method based on spatial spectrum sensing method of noncircular signals, called NC-α-MTG-MUSIC, which increases the effective aperture of the array via an extended array output containing an array output and its conjugate. Compared with the α-MTG-MUSIC algorithm, the new algorithm has better detection performance and DOA estimation accuracy. Computer simulation verifies the superiority and effectiveness of the algorithm.