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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document : 4 / 8 ÀÌÀü°Ç ÀÌÀü°Ç   ´ÙÀ½°Ç ´ÙÀ½°Ç

ÇѱÛÁ¦¸ñ(Korean Title) IEEE 802.11a OFDM SystemÀ» À§ÇÑ ÆÄÀÌÇÁ¶óÀÎ ±¸Á¶ IFFT/FFT ¸ðµâÀÇ ¼³°è¿Í ºñ±³
¿µ¹®Á¦¸ñ(English Title) Design and Comparison of the Pipelined IFFT/FFT modules for IEEE 802.11a OFDM System
ÀúÀÚ(Author) ÀÌâÈÆ   ±èÁÖÇö   °­ºÀ¼ø   Chang-Hoon Lee   Ju-Hyun Kim   Bongsoon Kang  
¿ø¹®¼ö·Ïó(Citation) VOL 08 NO. 03 PP. 0570 ~ 0576 (2004. 06)
Çѱ۳»¿ë
(Korean Abstract)
º» ³í¹®¿¡¼­´Â °í¼Ó ¹«¼± LAN¿¡¼­ »ç¿ëÇÏ´Â IEEE 802.11a OFDM(Orthogonal Frequency Division Multiplexing)¿¡¼­ ÁÖ¿ä ±¸¼ºÀÎ IFFT/FFT(Inverse Fast Fourier Transform/Fast Fourier Transform)¿¡ ´ëÇÑ ¼³°è¿¡ ´ëÇØ ºñ±³ÇÏ¿´´Ù. ¼³°èµÈ IFFT/FFT´Â ¹«¼± LANÀÇ Ç¥ÁØ¿¡ ¸Â°Ô 64 pointÀÇ FFT·Î ¿¬»êÀ» ¼öÇàÇϸç, S/P(Serial-to-Parallel)À̳ª P/S(Parallel-to-Serial)º¯È¯±â°¡ ÇÊ¿ä ¾ø´Â Pipelined FFTÀÇ ±¸Á¶·Î ¼³°èÇÏ¿´´Ù. ±× Áß Radix-2 ¾Ë°í¸®ÁòÀ» ÀÌ¿ëÇÑ R22SDF(Radix-2 Single-path Delay Feedback) ¹æ½Ä, R2SDF(Radix-2 Single-path Delay Feedback) ¹æ½Ä°ú Radix-4 ¾Ë°í¸®ÁòÀ» ÀÌ¿ëÇÑ R4SDF(Radix-4 Single-path Delay Feedback) ¹æ½Ä, R4SDC(Radix-4 Single-path Delay Commutator) ¹æ½ÄÀ» »ç¿ëÇÏ¿© ºñ±³ÇÏ¿´´Ù. Çϵå¿þ¾î ±¸Çö ½Ã ¹ß»ýÇÏ´Â ¿ÀÂ÷¸¦ ÁÙÀ̱â À§ÇØ Butterfly ¿¬»ê ÈÄ ÀϺΠ¼Ò¼öÁ¡À» °¡Áö°í °è»êÇÏ´Â ±¸Á¶·Î ¼³°èÇÏ¿´´Ù. R22SDF ¹æ½ÄÀ» ÀÌ¿ëÇÒ °æ¿ì ¸Þ¸ð¸®¸¦ Á¦¿ÜÇÑ Àüü °ÔÀÌÆ® ¼ö°¡ 44,747 °³·Î ´Ù¸¥ ±¸Á¶¿¡ ºñÇØ ÀûÀº Çϵå¿þ¾î¿Í ³·Àº ¿ÀÂ÷À²À» °¡Áø´Ù.
¿µ¹®³»¿ë
(English Abstract)
In this paper, we design the IFFT/FFT (Inverse fast Fourier Transform/Fast Fourier Transform) modules for IEEE 802.11a-1999, which is a standard of the High-speed Wireless LAN using the OFDM (Orthogonal Frequency Division Multiplexing). The designed IFFT/FFT is the 64-point FFT to be compatible with IEEE 802.11a and the pipelined architecture which needs neither serial-to-parallel nor parallel-to-serial converter. We compare four types of IFFT/FFT modules for the hardware complexity and operation : R22SDF (Radix-2 Single-path Delay feedback), the R2SDF (Radix-2 Single-path Delay feedback), R2SDF (Radix-4 Single-path Delay Feedback), and R4SDC (Radix-4 Single-path Delay Commutator). In order to minimize the error, we design the IFFT/FFT module to operate with additional decimal parts after butterfly operation. In case of the R22SDF, the IFFT/FFT module has 44,747 gate counts excluding RAMs and the minimized error rate as compared with other types. And we know that the R22SDF has a small hardware structure as compared with other types.
Å°¿öµå(Keyword) IEEE 802.11a   OFDM   IFFT/FFT   Pipelined FFT ±¸Á¶  
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