On the Design of an FPGA-Based OFDM Modulator for IEEE 802.16-2004
RECONFIG '05 Proceedings of the 2005 International Conference on Reconfigurable Computing and FPGAs (ReConFig'05) on Reconfigurable Computing and FPGAs
Fundamentals of WiMAX: Understanding Broadband Wireless Networking (Prentice Hall Communications Engineering and Emerging Technologies Series)
SPOCS: Application Specific Signal Processor for OFDM Communication Systems
Journal of Signal Processing Systems
Software implementation of WiMAX on the sandbridge sandblaster platform
SAMOS'06 Proceedings of the 6th international conference on Embedded Computer Systems: architectures, Modeling, and Simulation
Design of an efficient FFT Processor for OFDM systems
IEEE Transactions on Consumer Electronics
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This work investigates several approaches for implementing the OFDM functions of the fixed-WiMax standard on reconfigurable platforms. In the first phase, a custom RTL approach, using VHDL, is investigated. The approach shows the capability of a medium-size FPGA to accommodate the OFDM functions of a fixed-WiMax transceiver with only 50% occupation rate. In the second phase, a high-level approach based on the AccelDSP tool is used and compared to the custom RTL approach. The approach presents an easy flow to transfer MATLAB floating-point code into synthesizable cores. The AccelDSP approach shows an area overhead of 10%, while allowing early architectural exploration and accelerating the design time by a factor of two. However, the performance figure obtained is almost 1/4 of that obtained in the custom RTL approach. In the third phase, the Tensilica Xtensa configurable processor is targeted, which presents remarkable figures in terms of power, area, and design time. Comparing the three approaches indicates that the custom RTL approach has the lead in terms of performance. However, both the AccelDSP and the Tensilica Xtensa approaches show fast design time and early architectural exploration capability. In terms of power, the obtained estimation results show that the configurable Xtensa processor approach has the lead, where approximately the total power consumed is about 12--15 times less than those results obtained by the other two approaches.