NXDN: A brief overview

NXDN is a very narrowband protocol employing 6.25/12.5 KHz FDMA technology (It is generally accepted that 12.5 kHz channel spacing is narrowband as per the FCC mandate.) (More on this later in The history of NXDN™).

NXDN™ is the result of a joint technical alliance between Icom Incorporated and JVC KENWOOD Corporation. At the beginning, the main goals of this collaboration were to provide a low complexity digital two-way radio protocol that satisfied the FCC narrowbanding mandate at the initially proposed deadline of 2005, be a future-proof protocol that would still be viable even when 12.5 kHz spectrum became full and to offer an alternative “de-facto” standard to the Land Mobile Radio (LMR) industry that allowed the development of digital radio products without the