Abstract: On the basis of a thinned array and code division signals, the space time adaptive processing (STAP) on an airborne radar is investigated to carry out ground clutter suppression and moving target detection. The multiple phase center aperture synthesis method in code division mode is proposed to make the synthesized phase centers coincident with a full array both in quantity and distribution. This is realized by making use of the orthogonal code signals to achieve multiple-input and multiple-output, thus avoiding the high side lobes of a thinned array. Based on aperture synthesis, the STAP is used to achieve clutter suppression, and implement moving targets detection. Simulation results demonstrate the validity of the method proposed in the article.

Key words: thinned array, aperture synthesis, orthogonal code, space time adaptive processing, moving target detection