Cognitive radio is a thing. I presume the modern modem does have some problems to solve for which we don't know the exact solution. A cursory research returned

Cognitive radio is a thing. I presume the modern modem does have some problems to solve for which we don't know the exact solution. A cursory research returned this: https://www.scribd.com/document/629742504/37817-h00 https://www.scribd.com/document/629742504/37817-h00