In order to reduce location error of TDOA on the plane for the far emitter on the ground,the passive location of TDOA over-the-horizon based on troposcatter is put forward through approximation of the signal of propagation path.

Because of the fading characteristic in troposcatter channel,the mechanism of traditional phase locked loop is difficult to achieve the effect in troposcatter communication.

According to the three major principle about the Troposphere scattering communication, and discuss integrated the Turbulence theory、Non-coherent reflection and Coherent reflection theoretical advantages of the generalized model scattering theory model.

Analysis on a signal style suitable for troposcatter communication based on frequency adaptive technique;