But can we boost that signals - focusing not on observation, but on detection of objects in the solar system moving toward Earth? With such great resolution, wh

But can we boost that signals - focusing not on observation, but on detection of objects in the solar system moving toward Earth? With such great resolution, what power, scanning frequency etc. of an active radar would be needed? Considering the area we can't use focused beams (but impulses would be nice) - right?, could the solar radio emission be used instead or the light is better? Or maybe there is some background radiation on frequency that we can detect when is covered ?