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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) DS-CDMA ÇÏÇ⸵ũ¿¡¼­ ÆÄÀÏ·µÁö¿ø ä³ÎµîÈ­±â¸¦ ÀÌ¿ëÇÑ ´ÜÀÏ»ç¿ëÀÚ ¼ö½Å±â
¿µ¹®Á¦¸ñ(English Title) A Single-User ]deceiver using Pilot-Assisted Channel Equalizer for DS-CDMA Downlink
ÀúÀÚ(Author) ³²¿Á¿ì   ±èÀçÇü   ±èÀÀ¹è   Ock-Woo Nam   Jae-Hyung Kim   Eung-Bae Kim  
¿ø¹®¼ö·Ïó(Citation) VOL 04 NO. 03 PP. 0661 ~ 0669 (2000. 09)
Çѱ۳»¿ë
(Korean Abstract)
DS-CDMA ÇÏÇ⸵ũ¿¡¼­´Â Á÷±³È®»êºÎÈ£¿¡ ÀÇÇÏ¿© »ç¿ëÀÚµéÀ» ±¸ºÐÇϴµ¥ ´ÙÁß°æ·Î ÆäÀ̵ù(multhpath fading)¿¡ ÀÇÇÑ ´ÙÁßÁ¢¼Ó°£¼·(MAI)°ú ÁÖÆļö ¼±ÅÃÀû ÆäÀ̵ù¿¡ ÀÇÇÏ¿© È®»êºÎÈ£ÀÇ Á÷±³¼ºÀº ±ú¾îÁö°Ô µÇ°í ½Ã½ºÅÛÀÇ ¼º´É¿­È­¸¦ °¡Á®¿Â´Ù. µû¶ó¼­ º» ³í¹®¿¡¼­´Â ¼±Çü ä³Î µîÈ­±â¸¦ »ç¿ëÇÏ¿© ´ÙÁß°æ·Î ÆäÀ̵ù ä³ÎÀ» µîÈ­ ½ÃÅ´À¸·Î½á Á÷±³ºÎÈ£ÀÇ Á÷±³¼ºÀ» º¹±¸ÇÑ ÈÄ ºÎÈ£-Á¤ÇÕ ÇÊÅÍ(code-matched filter)¸¦ ÅëÇÏ¿© µ¥ÀÌÅ͸¦ º¹Á¶ÇÏ´Â ´ÜÀÏ»ç¿ëÀÚ ¼ö½Å±â¸¦ Á¦¾ÈÇÏ¿´´Ù. ±âÁ¸ÀÇ ¿¬±¸´Â ÁÖ·Î ÀÌ»óÀûÀΠä³ÎÁ¤º¸¸¦ °¡Á¤ÇÏ¿´´Âµ¥ º» ³í¹®¿¡¼­´Â ä³ÎÃßÁ¤ ¹æ¹ýÀ¸·Î º´·Ä±âÁØÀü¼Û(transmission of a parallel reference)¹æ¹ýÀÎ ÆÄÀÏ·µ ä³ÎÁö¿ø(pilot channel assisted)¹æ¹ýÀ» »ç¿ëÇÏ¿´À¸¸ç, ƯÈ÷ ä³Î ÃßÁ¤ÀÇ Á¤È®µµ¸¦ ³ôÀ̱â À§ÇÏ¿© »ç¿ëÀÚ ½ÅÈ£¿¡ ÁÖ±âÀûÀ¸·Î º¸È£½Éº¼(guard symbol)À» »ðÀÔÇÏ¿´´Ù. ¼º´ÉºÐ¼®°á°ú Á¤È®ÇÑ Ã¤³ÎÃßÁ¤À¸·Î ÀÎÇÏ¿© ÀÌ»óÀûÀΠä³ÎÁ¤º¸¸¦ »ç¿ëÇÑ °æ¿ì¿¡ ºñÇØ ¼º´ÉÀúÇÏ°¡ Å©Áö ¾Ê¾ÒÀ¸¸ç, MMSE criterion¿¡ ÀÇÇÑ Ã¤³ÎµîÈ­·Î ±âÁ¸ÀÇ ¼ö½Å±â¿¡ ºñÇØ Æ¯È÷ »ç¿ëÀÚ°¡ ¸¹À» °æ¿ì¿¡ ¿ì¼öÇÑ ¼º´ÉÀ» º¸ÀÓÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.
¿µ¹®³»¿ë
(English Abstract)
DS-CDMA downlink distinguishes actual user by orthogonal spreading codes ,but its orthogonality may be lost by the multiple access interference(MAI) caused by the multipath channel. Therefore in this paper, we proposed the single-user receiver, which use linear channel equalizer to eliminate the interference due to multipath channel and to recover orthogonality and then use code-matched filter to detect transmitted data.
Unlike existing research, which mainly assumed ideal channel information, we use pilot channel assisted methods that is a kind of transmission of a parallel reference method to estimate the channel coefficients. Especially we use guard symbols which are inserted periodically to estimate channel coefficients exactly without interference from user signal. The results show that we accepted an approximately ideal channel information and achieved excellent performance improvement using proposed receiver compared with the conventional receiver especially user populations are high.
Å°¿öµå(Keyword)
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