A space-time 2-D blocking technology and performance analysis

In array signal processing, there are two disadvantages in adaptive beam forming in the presence of main lobe interference, one is heightening of side-lobe level, the other is distortion and peak offset of main beam. Based on sky wave OTH radar, a method called space-time 2-D blocking processing is present to solve the problem in this paper. It utilizes the azimuth and frequency information to block main lobe interference. Furthermore, the performance, which is dependent on the estimated error of the signalpsilas frequency and azimuth, is analyzed from the output SNR and the condition number of received data matrix. The simulation result shows that the arithmetic has an ability of error-tolerance and has slight computation burden compared with full ADBF.