Atmel and Matra Nortel develop chipset for Tetrapol handsets

Atmel and Matra Nortel develop chipset for Tetrapol handsets
Richard Ball Atmel and Matra Nortel have developed a chipset for second generation public mobile radio (PMR) handsets using the Tetrapol standard. Combining an ARM7 processor with a voice codec and in-phase and quadrature modem, the design more than halves power requirements for PMR phones. “This is a state-of-the-art design for mixed signal ICs,” said Ben Altieri, Atmel’s director of advanced products. The design will also help PMR handsets follow the size trends set by GSM mobile phones. “Police and ambulance crews normally have very big terminals. This is frustrating. There is a need for a cellular- like handset,” said Jean Pierre Qu?mard, R&D director at Matra Nortel. With Atmel’s chipset, Matra has reduced the size of its second generation phones to just over 300cc. While this is not as good as the latest GSM phones, which are down to 100cc, the Tetrapol handset is ruggedised. Tetra and Tetrapol at a glance In terms of applications Tetra and Tetrapol are both public mobile radio schemes targeted for use by the military, emergency services and public transport systems. However, Tetra is based on a time division protocol, whereas Tetrapol uses frequency division. Tetra is an ETSI standard, written by the same committee that defined GSM. Tetrapol is the French version being touted by Matra.


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