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Sundance has introduced its latest FPGA IP core, which is targeted at enterprise networking, telecom transmission and switching, storage and high-end military and defence communication systems.

The FC300 is a complete implementation of an OFDM physical layer, based on 802.11a/g/n.

The first release of this COTS product targets the SMT351T FPGA module with an XC5VSX95T Virtex-5 FPGA from Xilinx.

However, because the design does not require any resources other than those commonly found in FPGAs, it can easily be retargeted to any device range, from Spartan to Virtex-7 to Altera Cyclone or Stratix.

Retargeting to different RF hardware is also possible as the VHDL of FC300 assumes only an I/Q baseband DAC/ADC interface.

FC300 may be used as a reference design to jump start the development of any custom RF application based on 802.11 or other proprietary OFDM data-transmission standard.

When used with the SMT911 RF, module data may be transmitted at up to 54Mb/s on any standard 20MHz-wide channel in the 2.4GHz ISM or 5GHz U-NII bands.

The core contains transmit and receive chains, and interfaces directly to other DSP or FPGA modules provided by the hardware platform.

All 802.11a/g features are supported, including data scrambling, forward error correction via convolutional encoding at rates from 1/2 to 3/4, sub-channel coding of BPSK, QPSK, 16QAM or 64QAM, both short- and long-training sequences, pilot insertion, and the IFFT/FFT required to convert to/from time-domain RF I/Q signals.

The receiver logic includes estimators for centre-frequency offset and fractional-sample symbol timing, as well as independent per-sub-channel gain and phase compensation.

The SMT911 supports 1×1 SISO and 2×2 MIMO on a single module.

FC300 may be used with a variety of RF/DSP/FPGA hardware modules available from Sundance DSP and different configurations may easily be created using the 3L Diamond development environment.

Sundance DSP

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