The digital private mobile radio (dPMR) describes a digital two-way radio standard released by the ETSI organization. The standard suits commercial, specialized, and public security applications. Based on 6.25 kHz FDMA technology and 4-FSK modulation mode, the dPMR supports data transmission rates of up to 4.8 KB/s. NXDN and DCR are built on the dPMR standard.
Established in 2007, the dPMR MoU is a global organization that comprises manufactures, suppliers, terminal users and testing agencies accepting and promoting the FDMA digital technology. Its leading 12 members include ICOM, KENWOOD, and Hytera.
Currently, the dPMR standard family consists of ETSI TS 102 490 (Tier1) and ETSI TS 102 658 (Tier2).
By using the FDMA technology, the dPMR standard provides a cost-effective digital voice and data solution. By effectively shortening the channel interval through a combination of 6.25 kHz FDMA and 4-FSK modulation technologies, the ETSI dPMR has improved the spectrum utilization efficiency.
NXDN indicates a digital two-way radio standard jointly formulated by KENWOOD and ICOM to target the American market. Established in 2007, the NXDN Forum currently has 15 members. The protocol for the standard has remained unpublished.
The DCR describes a digital two-way radio standard formulated by Japanese companies, such as ICOM and KENWOOD to target the digital two-way radio market. The final version of the standard is known as ARIB STD-98.
As an open digital two-way radio standard, the narrow digital radio (NDR) standard was formulated by the DRA alliance of digital two-way radio makers. The alliance comprises
24 members, such as China's leading two-way radio manufacturers, renowned colleges and universities, and research institutes. As the alliance's secretariat, director, general technology leader and a leading technical group, Hytera is responsible for drafting, revising, and promoting the standard and submitting the standard for review.
(1) For more information about dPMR, visit http://www.dpmr-mou.org/
(2) For more information about NXDN, visit http://www.nxdn-forum.com/