The following mechanism, by continually creating matter in the universe, if self coherent, would solve many unsolved physical problems : this cosmology would do without a big bang.

3d interference pattern of gravitational waves would create rogue waves at specific points in SpaceTime that would create matter and the CMB.

Creation of matter and gravity fields, at net zero energy would increase the expansion of the universe.

The perfect black body curve of the CMB would result from the exponential expansion of the universe.