Abstract: The distribution of ground clutter in angle-doppler space depends on the information of platform velocity, radar parameters and so on, which is known as the prior information. In this paper a model with matrix form of the ground clutter data is established. Then based on the equivalence between space and time domain, a Space-Time Block Canceller (STBC) for airborne radar to suppress the ground clutter is proposed via designing a space-time non-adaptive filter. Simulation results are given to show that the proposed STBC can be used as an efficient pre-filtering tool before the conventional Moving Target Indication (MTI) processing and the classical reduced- dimension adaptive processing.