The Applications of Monopulse Amplitude-Comparison to the Aliasing of Sparse Arrays
单脉冲比幅法在稀疏阵列相位模糊问题中的应用

The aliasing of sparse arrays could be theoretically discriminated by two signals with different frequencies, but it could not be eliminated completely in the presence of noise. In order to research the effect on the error decision of target’s angle of arrival in instantaneous detection in the condition of aliasing, monopulse amplitude-comparison is exploited to detect the angle of target and the distribution of detected-angle in the noise is derived. The error decision probability of target’s angle due to different frequencies signals illuminating the sparse arrays also is obtained according to the distribution above, and the difference between the amplitude- comparison considering only real part of the monopulse ratio and both parts is compared. The results show that the pdf of target’s angle by considering both parts is accordance with the simulation data.