HF signal combiners to improve HF digital reception using diversity reception.

The combiner that I am thinking of detects the S/N ratio of each signal stream by using a "Narrow Band" pass slot that is close to the receive frequency. The energy in the slot is converted  into a bias which may be a voltage or a numeric value. Using the bias value, the combiner prioritizes which signal will be the primary contributor to the output of the combiner. This technique has been used for signal improvement in Troposcatter and independent sideband for a least 50 years. I know the Flex engineers can come up with something better than what I used 50 years ago. Besides it would be another challenge for them. As if they needed more   Thanks Mike, AG6BF