dPMR (Digital Private Mobile Radio) is an open ETSI digital system standard introduced in 2006. It employs FDMA (Frequency Division Multiple Access) technology, adopted by ETSI as a European standard. In dPMR systems, a 12.5 kHz channel is divided into two frequency channels of 6.25 kHz each. Like DMR, dPMR is intended for the implementation of cost-effective digital solutions, both conventional and trunked.
dPMR is a protocol for digital radio communication systems that uses FDMA (Frequency Division Multiple Access – multiple access with frequency-division channels) with 6.25 kHz channel spacing. The description of this protocol is contained in the technical standards TS 102 490 and TS 102 658 issued by ETSI (European Telecommunications Standards Institute). Standard TS 102 490 specifies the requirements for license-free radios operating under the dPMR 446 protocol, while standard TS 102 658 defines the requirements for peer-to-peer mode networks (Mode 1), networks using one or more repeaters (Mode 2), as well as digital trunked radio networks (Mode 3). The dPMR protocol is particularly focused on achieving a high level of functionality using inexpensive and straightforward technologies.
Related articles: DMR, PMR, LPD (433.075-434.775 MHz), VHF, UHF (400-520 MHz).