CML Microcircuits recently announced that it added Adaptive Coded Modulation (ACM) capabilities to its CMX7164 multimode wireless data modem, QAM modulation suite. ACM features enable the modulation type and block format to change on the fly to dynamically select data block size, coding rate, and CRC size. Over-air commands enable a Tx host to select an optimum modulation type and coding per burst to suit application message size and link channel quality. In addition, they can relax required Rx host parsing speed. SPI Thru-Port macros speed serial slave control for shorter Tx/Rx mode transitions.
The CMX7164 covers constant envelope and linear modulation schemes, including GMSK/GFSK, 2/4/8/16-level FSK, 4/16/32/64-QAM, and V.23 to provide the ideal platform for customer-specific modulation schemes. Together these features make the CMX7164 a universal wireless data modem solution.
The DE9941 demonstrator/evaluation board is available and enables the CMX7164, CMX994E Direct Conversion Receiver, and CMX998 Cartesian Feedback Loop Transmitter to be demonstrated. The CMX7164 is currently available, offering low-power, 3.3-V operation in small VQFN/LQFP packaging.
Source: CML Microcircuits
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