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http://dx.doi.org/10.6109/jkiice.2008.12.12.2140

A Study on the Design of FFT Processor for UWB Ultrafast Wireless Communication Systems  

Lee, Sang-Il (국립목포대학교 정보공학부 정보전자공학)
Chun, Young-Il ((주) 한국정보공학)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.12, no.12, 2008 , pp. 2140-2145 More about this Journal
Abstract
We design and synthesize a 128-point FFT processor for multi-band OFDM, which can be applied to a UWB transceiver. The structure of a 128-point FFT processor is based on a Radix-2 FFT algorithm and a R2SDF pipeline architecture. The algorithm is efficiently modeled in VHDL and the result is simulated using Modelsim. Finally, they are synthesized on Xilinx Vertex-II FPGA, and an operational frequency of 18.7MHz has been obtained. It is expected that the proposed 128-point FFT processor can be applied to an entire FFT block as one of parallel processed FFTs. In order to obtain the enhanced maximum frequency of operation, we design the FFT module consisting of four 128-point FFT processors for parallel process. As a result, we achieve the performance requirement of computing the FFT module in multi-band OFDM symbol timing in 90nm ASIC process.
Keywords
UWB; Multi-Band OFDM; FFT Processor; Ultrafast Wireless Communication System;
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