Abstract: For the moving target indication (MTI) function of multiple-input multiple-output（MIMO）radar, the uniform array can only bring poor performance, the sparse array brings grating lobes which lead to the blind speeds and the limited length of antenna array on size-fixed platform. An antenna array optimization method is proposed, which is used to lower the minimum detectable velocity (MDV). Combining the array structure together with binary phase orthogonal codes which are designed to get high correlation and cross-correlation performance, high space time adaptive processing (STAP) performance is gotten with limited aperture length. The different STAP performances of various antenna array structures are compared through simulation, thus testifing the effectiveness of the method.

Key words: information processing, near space, multiple-input multiple-output radar, array optimization, orthogonal code diversity