CMX8341 - Consumer Microcircuits Limited

CMX8341 Digital PMR (dPMR) Baseband Processor

The 8341FI-1.x Function Image™ (FI) implements a half-duplex digital PMR processor including: 4FSK modem, a large proportion of the dPMR™ Air Interface; Physical, Data Link and Control layers, and an embedded low bit rate RALCWI Vocoder (with no license or royalties required). In conjunction with a suitable host and a limiter/discriminator based RF transceiv.

Features

 Digital PMR (dPMR) Baseband Processor o dPMR (ETSI TS 102 490) Compliant o Air Interface Physical Layer (Layer 1) o Air Interface Data Link layer (Layer 2) o 4FSK Modem
 Soft-decision Decoding
 AFSD (Automatic Frame Sync Detection)
 RALCWI Vocoder o Fully Embedded Implementation o No Licensing or Royalty payments o 3600bps Over Air Data Rate (2400bps Voice plus 1200bps Robust FEC) o 4-bit Viterbi Soft-decision Decoding
 Analogue PMR (Legacy mode) o Full Audio Band Processing o Sub-audio Filtering o CTCSS and DCS o 12.5 and 25kHz Channel Filters
 Built on FirmASIC™ Technology o Function.