Design and Comparison of FFT VLSI Architectures for SoC Telecom Applications with Different Flexibility, Speed and Complexity Trade-Offs
- First Online:
The design of Fast Fourier Transform (FFT) integrated architectures for System-on-Chip (SoC) telecom applications is addressed in this paper. After reviewing the FFT processing requirements of wireless and wired Orthogonal Frequency Division Multiplexing (OFDM) standards, including the emerging Multiple Input Multiple Output (MIMO) and OFDM Access (OFDMA) schemes, three FFT architectures are proposed: a fully parallel, a pipelined cascade and an in-place variable-size architecture, which offer different trade-offs among flexibility, processing speed and complexity. Silicon implementation results and comparisons with the state-of-the-art prove that each macrocell outperforms the known works for a target application. The fully parallel is optimized for throughput requirements up to several GSamples/s enabling Ultra-wideband (UWB) communications by using all channels foreseen in the standard. The pipelined cascade macrocell minimizes complexity for large size FFTs sustaining throughput up to 100 MSamples/s. The in-place variable-size FFT macrocell stands for its flexibility by allowing run-time reconfigurability required in OFDMA schemes while attaining the required throughput to support MIMO communications. The three architectures are also compared with common case-studies and target technology.
KeywordsVLSI design Fast Fourier Transform System-on-Chip OFDM telecom systems
Unable to display preview. Download preview PDF.
- 2.J.G. Andrews, A. Ghosh, R. Muhamed, Fundamentals of WiMAX, Understanding Broadband Wireless Networking. Prentice Hall Communications Engineering and Emerging Technologies Series (Prentice Hall, New York, 2007) Google Scholar
- 5.J. Bingham, Multicarrier modulation for data transmission: an idea whose time has come. IEEE Commun. Mag. 28(5) (1990) Google Scholar
- 6.R. Cabral, S. Escarigo, H. Neto, H. Sarmento, Implementation of a DAB receiver with FPGA technology, in Proc. IEEE ICCE, Jan 2006, pp. 397–398 Google Scholar
- 10.A. Cortes, I. Velez, J. Sevillano, A. Irizar, An FFT core for DVB-T/DVB-H receivers, in Proc. Third IEEE International Conference on Electronics, Circuits, and Systems (ICECS), Dec 2006, pp. 102–105 Google Scholar
- 11.M. Deinzer, M. Stoger, Integrated PLC-modem based on OFDM, in Int. Sym. On Power-line Communications and its Applications (ISPLC’99) (1999) Google Scholar
- 18.High rate ultra wideband PHY and MAC standard, Dec 2005, standard ECMA-368 Google Scholar
- 19.H. Holma, A. Toskala, LTE for UMTS, OFDMA and SC-FDMA Based Radio Access (Wiley, New York, 2009) Google Scholar
- 20.IEEE 802.11-05/1102r4, IEEE P802.11 Wireless LANs Joint Proposal: High throughput extension to the 802.11 Standard: PHY, Jan 2006 Google Scholar
- 23.J. Lee, J. Moon, K. Heo, M. Sunwoo, S. Oh, I. Kim, Implementation of application-specific DSP for OFDM systems, in Proc. IEEE International Conference on Circuits and Systems (ISCAS), May 2004, vol. 3, pp. 665–668 Google Scholar
- 27.K. Nakos, D. Reisis, N. Vlassopoulos, Addressing technique for parallel memory accessing in Radix-2 FFT Processors, in IEEE Int. Conference on Electronics, Circuits and Systems (ICECS), Sep 2008, pp. 52–56 Google Scholar
- 29.S. Perels, D. Haene, P. Luethi, A. Burg, N. Felber, W. Fichtner, H. Bolcskei, ASIC implementation of a MIMO OFDM transceiver for 192 Mbps WLAN, in Proc. IEEE ESSCIRC2005 (2005) Google Scholar