Abstract: In order to improve the detection capability of airborne radar for stealth targets and its own radio frequency stealth capability, an air-ground bistatic multi-input multi-output radar system is proposed. For the first time, the surface wave radar is introduced into the airborne platform, and the transceiver-separated configuration is used to effectively enhance the stealth detection capability of the receiving station on the airborne platform through the detection of ground transmission and air reception. In this type of system, each high-frequency surface wave antenna emits frequency-modulated continuous wave signals with different carrier frequencies, and a single omnidirectional high-frequency receiving antenna is installed on the carrier to receive the reflected echoes of the target. At the receiving end, signal separation is achieved by exploiting the differences in the transmitted signal frequencies, and then equivalent transmission beamforming is performed to measure the target angle using a single receiving antenna. Addressing the range-Doppler coupling problem in aerial motion platform, a waveform design method utilizing signals with different slopes is proposed to estimate both range and velocity. The simulation results demonstrate the effectiveness of the proposed method in measuring target parameters.