USS George H.W. Bush

The US Navy’s General Dynamics (GD) Mission Systems-built four-channel digital modular radios (DMRs) have successfully completed a mobile user objective system (MUOS) satellite communications test at the company’s MUOS test facility in Scottsdale, Arizona.

During testing, the navy’s networking radio DMR conducted voice calls and data transmission to and from the DMR to an army AN/PRC-155 two-channel Manpack radio using the MUOS satellite communications and ground station simulators.

General Dynamics Mission Systems president Chris Marzilli said: "The success of this test is important because it demonstrates the navy’s work, in collaboration with the army, to deliver on the promise of the MUOS satellite communications to joint forces worldwide."

The US Navy installed the DMR on surface and subsurface ships and a range of land-based locations in 1998. Currently, 500 secure, four-channel DMR radios support navy operations worldwide.

"The radios accommodate next-generation communications and integrated waveforms, as well as advanced network communications waveforms."

The DMR radios, the first software-defined radio used by the US military, are built using open architecture standards.

Aimed at offering improved functionality and interoperability, the radios accommodate next-generation communications and integrated waveforms, as well as advanced network communications waveforms.

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In February, GD announced that DMR radios were being upgraded with high-frequency dynamic routing (HFDR) software to add another four virtual channels.

The new high-frequency virtual channel exploitation software increases the communications capacity of DMR to 16 virtual channels when operated in the HF line-of-sight and ultra-high frequency satellite communications frequencies.

Image: Four digital modular radios (on the right) inside the USS George H W Bush (CVN 77) supercarrier’s ultra high-frequency work centre. Photo: courtesy of US Navy.