摘要(英) |
The European standard for terrestrial digital video broadcasting (DVB-T) adopted the orthogonal frequency-division multiplexing (OFDM) technique. Fast Fourier Transform is a key point to implement a DVB-T inner receiver. Therefore, the signal processing immediately is very important. Many similar Fourier transform algorithms are proposed after the first proposed by Cooley-Tukey in 1965. Radix-22 algorithm is one of them.
In this thesis, we implement a FFT processor which based on Single-Path Delay Feedback (SDF) of pipeline-based architecture. To decrease the hardware complexity, we use the Coordinate Rotation Digital Computer (CORDIC) in place of complex multiplexer. It needs a lot of memory in the architecture, so we implement it by Block Memory in FPGA to achieve the goal that saving hardware resources. At last, we implement the 2048/8192 points of FFT circuit on Xilinx Virtex-II Pro XC2vP30-FF1152 FPGA to verify the architecture that we proposed. |
參考文獻 |
[1] ETSI EN 300 744, Digital Video Broadcasting (DVB);Framing structure, channel coding and modulation for digital terrestrial television, European Standard.
[2] Ray Andraka, “A survey of CORDIC algorithms for FPGA based computers.”
[3] Shousheng He and Mats Torkelson, “A New Approach to Pipeline FFT processor.”
[4] Yih-Ming Chen, Digital Audio/Video Broadcasting Standard Techniques and Applications, Fall Workshop on Information Theory and Communications, Taiwan, 2005.
[5] Sang Yoon Park, Nam Ik Cho, Sang Uk Lee, Kichul Kim, Jisung Oh, “DESIGN OF 2K/4K/8K-POINT FFT PROCESSOR BASED ON CORDIC ALGORITHM IN OFDM RECEIVER.”
[6] Despain, A.M., “Fourier Transform Computations Using CORDIC Iterations.”
[7] Despain, A.M., “Very fast Fourier transform algorithms hardware for implementation.”
[8] XILINX, Product Specification DS234, “Single-Port Block Memory.”
[9] Yu-Wei Lin, Hsung-Yu Liu, and Chen-Yi Lee, “A Dynamic Scaling FFT Processor for DVB-T Applications.”
[10] Jung-Hee Suk, Dae-Won Kim, Taek-Won Kwon, Suk-Kun Hyung and Jun-Rim Choi, “A 8192 Complex Point FFT/IFFT for COFDM Modulation Scheme in DVB-T System.”
[11] Shousheng He and Mats Torkelson, “Design and Implementation of a 1024-point Pipeline FFT Processor.” |