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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 :

ÇѱÛÁ¦¸ñ(Korean Title) ¹«¼± LAN¿ë ºñÅͺñ º¹È£±âÀÇ È¿À²ÀûÀÎ ¼³°è
¿µ¹®Á¦¸ñ(English Title) Design of Viterbi Decoder for Wireless LAN
ÀúÀÚ(Author) Á¤ÀÎÅà  ¼Û»ó¼·   In-Taek Jeong   Sang-Seob Song  
¿ø¹®¼ö·Ïó(Citation) VOL 05 NO. 01 PP. 0061 ~ 0066 (2001. 05)
Çѱ۳»¿ë
(Korean Abstract)
´ÙÁß ¹Ý¼ÛÆĹæ½Ä ¹«¼± LAN¿¡¼­´Â ¿À·ùÁ¤Á¤À» À§ÇØ ±¸¼ÓÀå(constraint length : K)ÀÌ 7ÀÎ 64-state ±æ½ÓºÎÈ£¸¦ »ç¿ëÇϸç, º¹È£±â·Î ºñÅͺñ º¹È£±â¸¦ »ç¿ëÇÑ´Ù. ºñÅͺñ º¹È£±âÀÇ µ¿ÀÛ¼Óµµ·Î´Â 24 MbpsÀÇ ÀÔ·Â µ¥ÀÌÅÍ¿¡ ´ëÇØ 12 MHz ÀÌ»óÀÇ ¼ÓµµÃ³¸®¸¦ °¡Á®¾ßÇÑ´Ù. ÀÌ¿Í °°ÀÌ °í¼ÓÀÇ ºñÅͺñ º¹È£±â¸¦ ¼³°èÇϱâ À§Çؼ­´Â ÀϹÝÀûÀ¸·Î 32Á¶ÀÇ º´·Ä ³ªºñ±¸Á¶ ACS¸¦ °®µµ·Ï ÇÑ´Ù. º´·Ä ³ªºñ±¸Á¶ ACS¸¦ °®´Â ºñÅͺñ º¹È£±â¸¦ ¼³°èÇÒ °æ¿ì ´ÜÀÏ ACS ±¸Á¶¿¡ ºñÇØ »óÅ ¸ÞÆ®¸¯ ¸Þ¸ð¸®(state-metric memory), ¿ªÃßÀû ¸Þ¸ð¸®(trace back memory)¸¦ °ü¸®ÇÏ´Â º¹ÀâÇÑ Á¦¾îȸ·Î°¡ ÇÊ¿äÇÏÁö ¾Ê´Ù. ±×·¯³ª ¸¹Àº ACSÀ» »ç¿ëÇÔÀ¸·Î Çϵå¿þ¾îÀÇ º¹Àâµµ°¡ Áõ°¡ÇÏ°Ô µÈ´Ù.
ÀÌ¿¡ ´ëÇØ, º» ¿¬±¸¿§´Â ¸ðµç »óÅ¿¡¼­ ÄÚµå¿öµå¸¦ ¹ß»ý½ÃÅ°´Â º°°³ÀÇ È¸·Î¸¦ ´Ü¼øÇÑ ¿¬»êÀ¸·Î ´ëüÇϸç, ACS ±â´ÉÀ» À§ÇØ °í¼Ó Àú Àü·Â ½Ã½ºÅÛ¿¡ ¿ëÀÌÇÑ »õ·Î¿î °¡Áö°ª(branch metric)°è»ê¹æ¹ýÀ» °³¹ßÇÏ¿© Àû¿ëÇÑ´Ù. ±×¸®°í ¿ªÃßÀû °ú¾ü ½Ã °í¼Ó Àú Àü·Â µ¿ÀÛÀ» À§ÇØ one-pointer¹æ¹ýÀ» ä¿ëÇÏ¿© ÀüüÀûÀ¸·Î Àú Àü·Â ºñÅͺñ º¹È£±â¸¦ ¼³°èÇÑ´Ù.
¿µ¹®³»¿ë
(English Abstract)
In this paper, we design high speed Viterbi decoding algorithm which is aimed for Wireless LAN. Wireless LAN transmits data at rate 6~54 Mbps. This high speed is not easy to implement Viterbi decoder with single ACS. So parallel ACS butterfly structure is to be used and several time-dependent problem is to be solved. We simulate Viterbi algorithm using new branch metric calculating method to save time, and consider trace back algorithm which is adaptable to high speed Viterbi decoder. With simulated, we determine the structure of Viterbi decoder. This architecture is available to high speed and low power Viterbi decoder.

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