  In this paper, we revisit one-channel time reversal (TR) experiments through
multiple scattering media in the framework of the self-consistent multiple
scattering theory. The hyper resolution and the self-averaging property are
retrieved. The developed formalism leads to a deeper understanding of the role
of the ladder and most-crossed diagrams in a TR experiment, and also
establishes the link between TR and Coherent Backscattering (CBS). Especially,
we show that when the initial source and the time reversal point are at the
same location, the time-reversed amplitude is twice higher. Surprisingly, this
enhancement is due to the ladder diagrams and not to the most-crossed ones,
contrary to CBS. These theoretical predictions are confirmed by experimental
results. The experiments are performed with ultrasonic waves propagating
through a random collection of parallel steel rods.
