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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) ¹Ýº¹ºÎÈ£ÀÇ ¸ÖƼ·¹º§ º¯Á¶¹æ½Ä Àû¿ëÀ» À§ÇÑ ºñÆ®ºÐ¸® ¾Ë°í¸®Áò
¿µ¹®Á¦¸ñ(English Title) Bit Split Algorithm for Applying the Multilevel Modulation of Iterative codes
ÀúÀÚ(Author) ¹ÚÅµΠ  ±è¹ÎÇõ   ±è³²¼ö   Á¤Áö¿ø   Tae-Doo Park   Min-Hyuk Kim   Nam-Soo Kim   Ji-Won Jung  
¿ø¹®¼ö·Ïó(Citation) VOL 12 NO. 09 PP. 1654 ~ 1665 (2008. 09)
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(Korean Abstract)
º» ³í¹®¿¡¼­´Â ´ëÇ¥ÀûÀÎ ¹Ýº¹ ºÎÈ£ ¾Ë°í¸®ÁòÀÎ Åͺ¸ ºÎÈ£, LDPCºÎÈ£ TPC µî ¼¼ °¡Áö ¾Ë°í¸®Áò¿¡ ´ëÇØ 8PSKÀÌ»óÀÇ ´ÙÄ¡ º¯Á¶ ¹æ½Ä Àû¿ëÀ» À§ÇØ ¼ö½Å´Ü¿¡¼­ ºñÆ® ºÐ¸® ¹æ¹ýÀ» Á¦½ÃÇÑ´Ù. ¼ö½ÅµÈ I, Q ½Éº¼¸¸À» ÀÌ¿ëÇÏ¿© ¼¼ ºñÆ® ÀÌ»óÀÇ ºñÆ®¸¦ ºÐ¸®Çϱâ À§ÇÑ LLR ¹æ½Ä¿¡ ±âÃʸ¦ ÇÏ¿© LLR ¹æ½ÄÀÇ ´ÜÁ¡ÀÎ º¹Àâµµ¸¦ °³¼±Çϱâ À§ÇØ Euclidean, MAX, sector, center focusing ¹æ½Ä¿¡ ´ëÇØ °ËÅäÇÏ¿´À¸¸ç, ¼¼ °¡Áö ¹Ýº¹ ºÎÈ£¿¡ ´ëÇØ ÃÖÀûÀÇ ºñÆ® ºÐ¸® ¹æ¹ýÀ» Á¦½ÃÇÏ¿´´Ù. ¶ÇÇÑ DVB-S2¿¡ Àû¿ëµÇ´Â double ring ±¸Á¶ÀÇ 16-APSK, Áö»óÆÄ DMB¿¡ Àû¿ëµÇ´Â °ÝÀÚ±¸Á¶ÀÇ 16-QAM ¹æ½Ä¿¡ ´ëÇØ ÃÖÀûÀÇ ºñÆ® ºÐ¸® ¹æ¹ýÀ» Á¦½ÃÇÏ¿´´Ù.
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(English Abstract)
This paper presents bit splitting methods to apply multilevel modulation to iterative codes such as turbo code, low density parity check code and turbo product code. Log-likelihood ratio method splits multilevel symbols to soft decision symbols using the received in-phase and quadrature component based on Gaussian approximation. However it is too complicate to calculate and to implement hardware due to exponential and logarithm calculation. Therefore this paper presents Euclidean, MAX, sector and center focusing method to reduce the high complexity of LLR method. Also, this paper proposes optimal soft symbol split method for three kind of iterative codes. Futhermore, 16-APSK modulator method with double ring structure for applying DVB-S2 system and 16-QAM modulator method with lattice structure for T-DMB system are also analyzed.
Å°¿öµå(Keyword) turbo code   low density parity check code   turbo product code   log-likelihood ratio  
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