USRP2
[1] is another platform worth mentioning since is very popular between CR research groups. It is well established testbed for Cognitive Radio network experimentation that offers a number of platforms including E100 (embedded) and N200 (networked).  E100 series employs an FPGA and an OMAP 3, which includes an ARM Cortex-A8 and a C64 DSP. The hardware is capable for carrying out standalone operation for embedded applications. The architecture includes a Xilinx® Spartan® 3A-DSP 1800 FPGA, 64 MS/s dual ADC, 128 MS/s dual DAC and a suite of interfaces to support connectivity. I/O includes stereo input/output, HDMI out, USB Host, USB OTG, Ethernet and a Serial Console. A modular design allows the USRP E100 to operate from DC to 6GHz. The USRP N200 series is a networked platform that provides high-bandwidth, high-dynamic range processing capability. The product architecture similar to the E100 series, includes a Xilinx® Spartan® 3A-DSP 1800 FPGA but with a 100 MS/s dual ADC, 400 MS/s dual DAC and Gigabit Ethernet connectivity to stream data to host processors. A modular design allows the USRP N200 to operate from
DC to 6 GHz. The expansion port available allows MIMO configuration employing multiple synchronised USRP N200 series devices. The FPGA offers the potential to process up to 100 MHz of RF bandwidth in both transmit and receive directions. The FPGA firmware can be reloaded through the Gigabit Ethernet interface.

[1] USRP2:https://www.ettus.com/product