IEICE Electronics Express | |
Memory efficient DIT-based SDF IFFT for OFDM systems | |
Ho-Yun Lee3  In-Gul Jang2  Jun-Ho Kim3  Kyung-Ju Cho1  Jin-Gyun Chung3  | |
[1] Department of Electronic Engineering, Wonkwang University;Electronics and Telecommunications Research Institute (ETRI);Division of Electronic Engineering, Chonbuk National University | |
关键词: IFFT; memory reduction; DIT; SDF; | |
DOI : 10.1587/elex.11.20140010 | |
学科分类:电子、光学、磁材料 | |
来源: Denshi Jouhou Tsuushin Gakkai | |
【 摘 要 】
References(5)This paper presents a new memory reduction method of IFFT for OFDM systems, based on a mapping of three IFFT input signals which consist of modulated data, pilot and null signals. The proposed method focuses on reducing the memory size in the bit-reversal part which requires the largest number of memory cells in IFFT architectures. To reduce the memory size, we propose a decimation-in-time (DIT) twiddle factor shifting algorithm to remove the multiplications in the first two stages. It is shown that the proposed method achieves a memory reduction of about 30% compared to previous methods.
【 授权许可】
Unknown
【 预 览 】
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RO201911300895326ZK.pdf | 1667KB | download |