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Design of Efficient FFT Processor for IEEE 802.16e Mobile WiMax Systems  

Park, Youn-Ok (한국전자통신연구원)
Park, Jong-Won (충남대학교 공과대학 정보통신공학과)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.10, no.2, 2010 , pp. 97-102 More about this Journal
Abstract
In this paper, an area-efficient FFT processor is proposed for IEEE 802.16e mobile WiMax systems. The proposed scalable FFT processor can support the variable length of 128, 512, 1024 and 2048. By reducing the required number of non-trivial multipliers with mixed-radix (MR) and multi-path delay commutator (MDC) architecture, the complexity of the proposed FFT processor is dramatically decreased without sacrificing system throughput. The proposed FFT processor was designed in hardware description language (HDL) and synthesized to gate-level circuits using 0.18um CMOS standard cell library. With the proposed architecture, the gate count for the processor is 46K and the size of memory is 64Kbits, which are reduced by 16% and 27%, respectively, compared with those of the 4-channel radix-2 MDC (R2MDC) FFT processor.
Keywords
IEEE 802.16e WiMax; MIMO-OFDM; MRMDC; Scalable FFT;
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