A waveform optimal design algorithm is presented in the paper

which utilizes zero correlation zone codes in the multiple-input single-output system used for sparse space-borne radar.It is shown that a single satellite receiver is sufficient for SAR-GMTI.The special bi-phase encoded waveforms are transmitted by multiple satellites

the echoes from all transmit satellites are received by one satellite.After separating by different signal match filters

the main-lobes in the special region of the pulse compression results are almost identical

and the side-lobes are low.And so

the clutter

around the detected cell

can be rejected by the presented algorithm.The simulation results show that the proposed algorithm is effective and feasible.