Switching scheme for a FMCW-MIMO radar on a moving platform

For MIMO radar systems orthogonal waveforms are required to distinguish between the different transmitted signals at the different receivers. A hardware cost efficient way is the use of time-multiplexing, where the transmitters are active sequentially after each other. In the presence of platform or target movement, the sampling theorem in the spatial domain (along track) might not be fulfilled anymore which causes problems in the azimuth focusing. In this paper an interlaced switching scheme for a FMCW MIMO radar is proposed to overcome this issue. To verify the proposed method measurements were performed.