CML Microcircuits has a wireless modem with FFSK/MSK functionality.

The CMX7143 is designed to address the requirements for multi-mode wireless data transmission in machine-to-machine and software defined radio products.

Also suitable for point-to-point telemetry systems, the multi-mode wireless data modem is built on a proprietary FirmASIC component technology. Initially the product was launched with 4-Level FSK operation, but as the chip is configurable via special Function Image data files to enable further wireless data scheme operation, it also supports GMSK functionality in addition to 4-Level FSK operation.

This has now been extended to include FFSK/MSK data scheme operation.

The Function Image files configure the on-chip sub-systems and are uploaded during device initialisation from an external EEPROM or host microcontroller over the product’s C-BUS serial interface.

Data acquisition rates of 4.8kbit/s to 19.2kbit/s are supported. There is automatic frame sync detection and RSSI processing for Listen Before Transmit (LBT) applications.

See http://www.cmlmicro.com