Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)
Current Result Document :
ÇѱÛÁ¦¸ñ(Korean Title) |
Çù´ë¿ª Àç¸Ó ´ëÀÀ°ú ÆÄÀÏ·µ ¿À¹öÇìµå °¨¼Ò¸¦ À§ÇÑ »õ·Î¿î SC-FDE Àü¼Û±¸Á¶ |
¿µ¹®Á¦¸ñ(English Title) |
A New SC-FDE Transmission Structure for Coping with Narrow Band Jammers and Reducing Pilot Overhead |
ÀúÀÚ(Author) |
ÁÖ¼Ò¿µ
ÃÖÁõ¿ø
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So-Young Joo
Jeung-Won Choi
Dong-Hyun Kim
Eui-Rim Jeong
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¿ø¹®¼ö·Ïó(Citation) |
VOL 23 NO. 08 PP. 0981 ~ 0987 (2019. 08) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â ÆÄÀÏ·µÀ¸·Î ¹ß»ýÇÏ´Â ÆÄÀÏ·µ ¿À¹öÇìµå¸¦ °¨¼Ò½ÃÅ°¸é¼ Çù´ë¿ª °£¼·½ÅÈ£ ȤÀº Àç¸Ó¿¡ ´ëÀÀÇÒ ¼ö ÀÖ´Â »õ·Î¿î SC-FDE (single carrier frequency domain equalization) ±¸Á¶¸¦ Á¦¾ÈÇÑ´Ù. ±âÁ¸ÀÇ SC-FDE ±¸Á¶´Â Çù´ë¿ª Àç¸Ó°¡ Á¸ÀçÇÒ ¶§ ½Ã°£¿µ¿ª ä³Î ÃßÁ¤ÀÌ ¾î·Á¿ö ¼ö½Å±âÀÇ ¼º´ÉÀÌ ÀúÇϵǴ ´ÜÁ¡ÀÌ ÀÖ´Ù. ¶ÇÇÑ ¸Å SC-FDE¸¶´Ù ä³ÎÃßÁ¤À» À§ÇÑ ÆÄÀÏ·µÀ» Àü¼ÛÇÏ¿© ½ºÆåÆ®·³ È¿À²ÀÌ ÀúÇϵǴ ¹®Á¦µµ ÀÖ´Ù. ÀÌ¿Í °°Àº ¹®Á¦¸¦ ÇØ°áÇϱâ À§ÇØ Á¦¾ÈµÈ ±¸Á¶´Â ½Ã°£¿µ¿ª ä³Î ÃßÁ¤¾øÀÌ °ð¹Ù·Î ÁÖÆļö ¿µ¿ª ä³Î ÃßÁ¤À» ¼öÇàÇÒ ¼ö ÀÖµµ·Ï ¼³°èµÈ´Ù. ¶ÇÇÑ ÆÄÀÏ·µ ¿À¹öÇìµå¸¦ °¨¼Ò½ÃÅ°±â À§Çؼ µÎ °³ÀÇ ÆÄÀÏ·µ »çÀÌ¿¡ ¿©·¯ °³ÀÇ SC-FDE µ¥ÀÌÅÍ ºí·ÏÀ» Àü¼ÛÇÏ°í, µÎ °³ÀÇ ÆÄÀÏ·µÀ» ÀÌ¿ëÇÑ ¼±Çü º¸°£ ä³Î ÃßÁ¤À» ÅëÇØ °¢ µ¥ÀÌÅÍ ºí·Ï¿¡¼ÀÇ Ã¤³Î Ư¼ºÀ» ã´Â´Ù. ÀÌ·¸°Ô ±¸ÇÑ Ã¤³Î ÃßÁ¤°ªÀ» »ç¿ëÇÏ¿© ÁÖÆļö ¿µ¿ª µîȸ¦ ¼öÇàÇϸé Çù´ë¿ª Àç¸Ó°¡ ÀÖ´Â »óȲ¿¡¼µµ Àç¸Ó Á¦°Å¿Í ÇÔ²² ¾ÈÁ¤ÀûÀÎ µîÈ°¡ °¡´ÉÇÏ´Ù. Á¦¾ÈÇÏ´Â ±¸Á¶ÀÇ ¼º´ÉÀº ÄÄÇ»ÅÍ ¸ðÀǽÇÇèÀ» ÅëÇØ È®ÀÎÇÑ´Ù.
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¿µ¹®³»¿ë (English Abstract) |
In this paper, we propose a new SC-FDE (single carrier frequency domain equalization) structure to cope with narrow band interference signals or jammers and reduce pilot overhead. The conventional SC-FDE structure has a problem that the receiver performance degrades severely due to difficulty in time-domain channel estimation when narrow band jammers exist. In addition, the spectral efficiency is lowered by transmitting pilot at every SC-FDE block to estimate channel response. In order to overcome those problems, the proposed structure is devised to estimate frequency domain channel directly without time domain channel estimation. To reduce the pilot overhead, several data blocks are transmitted between two pilots. The channel estimate of each data block is found through linear interpolation of two channel estimates at two pilots. By performing frequency domain channel equalization using this channel estimate, the distortion by the channel is well compensated when narrow band jammers exist. The performance of the proposed structure is confirmed by computer simulation.
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Å°¿öµå(Keyword) |
ÆÄÀÏ·µ ¿À¹öÇìµå
ÁÖÆļö ¿µ¿ª
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Çù´ë¿ª Àç¸Ó
ä³Î ÃßÁ¤
pilot overhead
frequency domain
linear interpolation
narrow band jammer
channel estimation
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