Frequency Agile Signal Processing in Direct Conversion Software Radio

Problems resulting from having multiple frequency bands as well as different communication standards make it impossible for the current generation of analog systems to interoperate. Providing all signal processing in software by converting received signals into digital form immediately after an antenna produces a new qualitative leap in frequency agility as well as protocol standard independence. It solves the problem of system interoperability in a highly fragmented communication environment. However to realize all the potential benefits of direct conversion radio a few vital signal processing problems originating from the specifics of software radio have to be addressed. The offered paper describes direct conversion software radio problems and shows potential ways of their solution