Some kind of MOBITEX
From Signal Identification Wiki
Unlikely to be MOBITEX, but will need IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. for confirmation. AFAIK we do not have MOBITEX uplink, only downlink. --Cartoonman (talk) 05:12, 19 September 2017 (NZST)