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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) ¼±Çü ÀûÀÀ µîÈ­±â Àû¿ë¿¡ ÀÇÇÑ ±¤´ë¿ª ¹«¼±Ã¤³Î Ư¼º °³¼±¿¡ °üÇÑ ¿¬±¸
¿µ¹®Á¦¸ñ(English Title) A Study on Improvement of Broadband Radio Channel Characteristics using Linear Adaptive Equalizer
ÀúÀÚ(Author) À±¿µ¼®   ÇÏ´öÈ£   Young-Seok Yoon   Deock-Ho Ha  
¿ø¹®¼ö·Ïó(Citation) VOL 04 NO. 01 PP. 0211 ~ 0218 (2000. 03)
Çѱ۳»¿ë
(Korean Abstract)
º» ¿¬±¸¿¡¼­´Â ÃÖ¼Ò Àڽ ¿¡·¯ ÃÖ¼ÒÈ­(MMSE: Minimum Mean Square Error) ¼±Çü ÀûÀÀ µîÈ­±â¸¦ ÀÌ¿ëÇÏ¿© ½Ç³» ¹«¼± ±¤´ë¿ª °í¼Ó ½ÅÈ£Àü¼Û Ư¼º °³¼±ÀÇ ±âÃÊ¿¬±¸·Î¼­, ¸ÕÀú 16-QAM ½Ã½ºÅÛ¿¡ ä¿ëÇÒ °æ¿ìÀÇ ¼º´ÉÀ» ÄÄÇ»ÅÍ ½Ã¹Ä·¹À̼ÇÀ» Åë»õ ºÐ¼®ÇÏ¿´À¸¸ç, ¶ÇÇÑ ½ÇÁ¦ÀûÀ¸·Î ½Ç³» ºñ°¡½Ã°Å¸® Á¶°Ç¿¡¼­ ¿øÇüÆíÆÄ ¾ÈÅ׳ª¸¦ ÀÌ¿ëÇÏ¿© ÃøÁ¤ÇÑ ±¤´ë¿ª ½ÅÈ£¿¡µµ Àû¿ëÇÏ¿© ±¤´ë¿ª ¹«¼±Ã¤³Î Ư¼º °³¼±À» ½ÃµµÇÏ¿´´Ù. ±× °á°ú MMSE µîÈ­±â¸¦ ä¿ëÇÑ °æ¿ì°¡ µîÈ­±â¸¦ ä¿ëÇÏÁö ¾ÊÀº Åë»êÀÇ 16-QAM¿¡ ºñÇØ 10^2¸¦ ±âÁØÀ¸·Î ¾à 6dB, 10^-3À» ±âÁØÀ¸·Î 13dB Á¤µµÀÇ ¼º´É °³¼±À» °¡Á®¿ÔÀ¸¸ç, ½Ç³» ºñ°¡½Ã°Å¸® Á¶°Ç¿¡¼­ ÃøÁ¤ÇÑ ±¤´ë¿ª ½ÅÈ£¿¡ Àû¿ë°á°ú »ó´çÇÑ ´ë¿ª³» ÆíÂ÷Ư¼º °³¼±ÀÌ ÀÖ¾úÀ¸¸ç, ¶ÇÇÑ, ÆíÆÄ ´ÙÀ̹ö½ÃƼ ±â¹ýÀ» ÇÔ²² Á¢¸ñÇÔÀ¸·Î º¸´Ù È¿°úÀûÀ¸·Î ±¤´ë¿ª ä³ÎƯ¼º ¹× ÆäÀ̵ùÀ» °³¼³ÇÒ ¼ö ÀÖ¾ú´Ù.
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(English Abstract)
This paper describes the improvement of broadband radio channel characteristics using a MMSE adaptive equalization technique as a fundamental study of high transmission rates in indoor radio channel. First, the performance of 16-QAM system that employs a MMSE linear adaptive equalizer in Rayleigh fading channel is analyzed. Next, in order to improve broadband radio channel characteristics, we apply an adaptive equalization technique employing the MMSE algorithm to the radio channel measured by using circularly polarized antenna under indoor NLOS(non-line-of sight) environment. Consequently, for 16-QAM with adaptive equalizer, we can achieve the improvement of about 13 dB at 10^-3 error rate as compared with general 16-QAM. Moreover, it was found that the adaptive equalization technique could improve broadband radio channel characteristics over the all measured areas. Also, it was found that the employing both adaptive equalization and polarization diversity technique together could improve broadband radio channel characteristics and reduce fading more effectively.
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