Description: The features of construction and functioning of combined highways are examined in RLS with equivalent internal coherentness at the use in them of digital treatment of signals. Requirements are pulled out to the basic digital devices in such RLS. Possibilities of modern digital element base are analysed on conforming to the noted requirements. Two basic directions are offered in realization of providing of equivalent internal coherentness in RLS with ascillators: vehicle and algorithmic. The possible ways of realization of both directions come into a question.
Keywords: sounding signal, coherentness, phasing, selection of moving-targets