TDMA Technology: Bringing Increased Capacity and Functionality to Professional Digital Two-Way Radio
published: cw 25, 2007 in Supply Chain Technology & RFIDThrough most of its history, two-way radio has meant analog voice — the representation of sound waves as either amplitude modulated (AM) or frequency modulated (FM) radio waves. In fact, this is one of the last areas of professional communications to be touched by digital technology. But that’s changing, very quickly, for very good reasons.
Modulating the voice into digital signals, rather than analog, provides several advantages. First and foremost, digital technology provides better noise rejection and preserves voice quality over a greater range than analog. Especially at the farthest edges of the transmission range, users can hear what’s being said much more clearly — increasing the effective range of the radio solution and keeping users responsive to changing situations in the field. Depending on the technologies used, digital systems can also be designed to:
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Make more efficient use of available, licensed RF spectrum
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Combine voice and data access in the same device, delivering more information while
empowering field workers with systems that are more portable, flexible, and much easier
to use than two different and incompatible systems
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Enable integration and interoperability with back-end data systems and external systems
Combine analog and digital voice in the same device, easing the migration to digital while
preserving investments in analog technology
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Provide strong, practical, easy-to-use privacy solutions without the significant loss in voice
quality that analog scrambling can cause
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Enable flexible and reliable call control and signaling capabilities
Flexibly adapt to changing business needs and new applications through a modular architecture
Source: Motorola
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