Abstract: The performance of high resolution algorithms influences the ability of detecting targets for sonar and radar.In this paper,the direct data domain approach with spatial smoothing is studied,which generates nulls in the interference directions.The proposed approach regards real targets as the interferences via adding virtual desired signals to the received data to produce nulls in the real target directions,i.e.use a virtual desired signal in certain direction on the left-side of a beampattern to get a distribution of nulls in the direction of 0°~90°,use a virtual desired signal in certain direction on the right-side of a beampattern to get the distribution of nulls in the direction of-90°~0°.Combining these two charts can get the final output power spectrum under the condition of one snapshot data without knowing sources a priori.The proposed approach can not only get stable high target resolution,but also dispose coherent signals.Numerical simulations verify the validity and capability of the proposed approach.