TY JOUR TI Advanced methods of voice-frequency track circuits coding KW voice-frequency track circuit KW automatic cab signaling system KW transmitter relay KW code combination KW electric arc KW non-contact generator of ALSN code signals KW relay switching elements KW train traffi c safety KW electric interlocking KW matching elements KW rolling stock JO Transport automation research AU Kravtsov, Y.A. AU Arkhipov, E.V. AU Bakin, M.E. PY 2015 IS 1 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"