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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) ±Ø´ÙÁß ¾ÈÅ׳ª ¼¿·ê·¯ ½Ã½ºÅÛÀ» À§ÇÑ ÆÄÀÏ·µ µµ¾à ±â¹ý
¿µ¹®Á¦¸ñ(English Title) Pilot Hopping Scheme for Massive Antenna Systems in Cellular Networks
ÀúÀÚ(Author) ±è¼ºÈ¯   ¹ÝÅ¿ø   ÀÌ¿õ¼·   ·ùÁ¾¿­   Seong Hwan Kim   Tae-Won Ban   Wongsup Lee   Jong Yeol Ryu  
¿ø¹®¼ö·Ïó(Citation) VOL 21 NO. 04 PP. 0718 ~ 0723 (2017. 04)
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(Korean Abstract)
º» ³í¹®¿¡¼­, ±Ø´ÙÁß ¾ÈÅ׳ª ½Ã½ºÅÛÀ» ´ÙÁß¼¿ ȯ°æ¿¡ Àû¿ëÇÏ°í ±âÁö±¹ÀÇ ¾ÈÅ׳ª ¼ö°¡ ¹«ÇÑÇÏ´Ù°í °¡Á¤ÇÑ »óÅ¿¡¼­, ÆÄÀÏ·µ ¿À¿°À¸·Î ÀÎÇØ Á¦ÇÑµÈ ½Ã½ºÅÛ ¿ë·®À» °³¼±ÇÏ´Â ÆÄÀÏ·µ µµ¾à ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. ±âÁ¸ÀÇ ÆÄÀÏ·µ °íÁ¤ ¹æ½ÄÀº,°¢ »ç¿ëÀÚ°¡ ±ä ½Ã°£ µ¿¾È µ¿ÀÏÇÑ Signal-to-interference ratio (SIR)¸¦ ¾ò°ÔµÈ´Ù. µû¶ó¼­, ¾àÇÑ °£¼·À» ¹Þ°Ô µÈ »ç¿ëÀÚ´Â Áö¼ÓÀûÀ¸·Î SIRÀÌ ³ôÀº ¹Ý¸é¿¡, °­ÇÑ °£¼·À» ¹Þ°Ô µÈ »ç¿ëÀÚÀÇ SIRÀº Áö¼ÓÀûÀ¸·Î ³·¾Æ¼­ ¼­ºñ½ºÀÇ ÁúÀÌ ÀúÇϵȴÙ. º» ³í¹®¿¡¼­ Á¦¾ÈÇÑ ÆÄÀÏ·µ µµ¾à ±â¹ý¿¡¼­´Â ¸Å ŸÀÓ ½½·Ô¸¶´Ù ´Ù¸¥ ÆÄÀÏ·µ ½ÅÈ£¸¦ »ç¿ëÇϸç, ÀÌ¿¡ µû¶ó ¸Å¹ø ´Ù¸¥ ¾çÀÇ °£¼·À» ¹Þ°Ô µÇ¹Ç·Î, ¸Å ŸÀÓ ½½·Ô¸¶´Ù SIRÀÌ ¿äµ¿Ä¡°Ô µÈ´Ù. ÀÌ·¯ÇÑ Ã¤³Î¿¡¼­ Hybrid Automatic Repeat & reQuest (HARQ) ±â¹ýÀ» Àû¿ëÇÒ °æ¿ì¿¡, ¾Æ¿ôƼÁö È®·ü°ú Àü¼Û·üÀÇ °³¼± È¿°ú¸¦ ¾òÀ» ¼ö ÀÖ´Ù. º» ³í¹®¿¡¼­´Â ±Ø´ÙÁß ¾ÈÅ׳ª ½Ã½ºÅÛ¿¡ ÆÄÀÏ·µ µµ¾à ±â¹ýÀ» Àû¿ë ÈÄ, üÀ̽º °áÇÕ À¯ÇüÀÇ HARQ¸¦ Àû¿ëÇÏ°í ½Ã¹Ä·¹À̼ÇÀ» ÅëÇÏ¿© ¼º´ÉÀÌ °³¼±µÊÀ» º¸ÀδÙ.
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(English Abstract)
We propose a pilot hopping scheme that improves the limited system capacity due to pilot contamination in multi-cell environment with large-scale antenna arrays at a base station, assuming the infinite number of antennas. In the conventional fixed pilot scheme, each user obtains the same signal-to-interference ratio (SIR) over a long period of time. Therefore, a user with strong interference has continuously low SIR which degrades its service quality. In the proposed pilot hopping scheme, different pilot signals are used for each time slot, and different amounts of interference are received every time. When such a pilot hopping technique is applied, the SIR fluctuates at every time slot. When the Hybrid Automatic Repeat & reQuest (HARQ) technique is applied in such a channel, the outage probability and transmission rate are improved. We show that there is the performance gain of the proposed scheme over the conventional scheme through computer simulations.
Å°¿öµå(Keyword) ±Ø´ÙÁß¾ÈÅ׳ª   ¼¿·ê·¯ ½Ã½ºÅÛ   ÇÏÀ̺긮µå ÀçÀü¼Û   ÆÄÀÏ·µ µµ¾à ±â¹ý   large-scale antenna arrays   cellular system   HARQ   pilot hopping scheme  
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