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The defense date of the thesis is 2005-09-02
The current date is 2019-05-23
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URN etd-0902105-152419 Statistics This thesis had been viewed 1994 times. Download 19 times. Author Shin-Yi Song Author's Email Address No Public. Department Communication Engineering Year 2005 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 67 Title Investigation and Design of a Variable Length FFT Processor for OFDM Communication Systems Keyword variable length FFT processor pipelined architecture OFDM OFDM pipelined architecture variable length FFT processor Abstract This paper proposes a variable length FFT processor for Orthogonal Frequency Division Multiplex(OFDM) communication systems. We use radix-2/4/8 algorithm in pipelined architecture, which can effectively minimize the number of complex multiplications. Due to radix-2/4/8 algorithm has regularity. So, it is easy to be implemented in VLSI, especially in a pipelined architecture. Besides, in order to reduce the required chip area and power consumption, we need fixed-point arithmetic, and twiddle factors are stored one-eighth period sine and cosine ROM .
Based on this architecture, a variable- length FFT is designed for use in the 802.11a DAB, DVB-T, ADSL and VDSL applications. It can deal with 64 to 8192 points FFT. Finally, The chip we used is Xilinx XC2V 1000 FG456 which achieve radix-2/4/8 FFT architecture, we also use the logic analyzer to verify our simulation result.
Advisor Committee Deng-Bin Lin - advisor
Wu-Shiung Feng - co-chair
Yau-Fu Jan - co-chair
Files Date of Defense 2005-07-28 Date of Submission 2005-09-02