Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)
Current Result Document :
ÇѱÛÁ¦¸ñ(Korean Title) |
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¿µ¹®Á¦¸ñ(English Title) |
Noise-Predictive Decision-Feedback Equalizer for Wireless Mobile Communications |
ÀúÀÚ(Author) |
È«´ë±â
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Dae-Ki Hong
Sung-Jin Kang
Sun-Hee Kim
Young-Sung Kim
Jin-Woong Cho
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¿ø¹®¼ö·Ïó(Citation) |
VOL 12 NO. 01 PP. 0164 ~ 0171 (2008. 01) |
Çѱ۳»¿ë (Korean Abstract) |
µðÁöÅÐ Åë½Å¿¡¼´Â Àü¼Û ä³ÎÀÇ ¿Ö°îÀ» º¸»óÇØ ÁÖ´Â ÀûÀÀ µîȱⰡ ÇʼöÀûÀÌ´Ù. ÀÌ·¯ÇÑ ÀûÀÀ µîȱâ´Â ¿ä±¸µÇ´Â ºñÆ® ¿ÀÀ² (BER: Bit Error Rate)À» ¾ò±â À§Çؼ À̵¿ Åë½Å ½Ã½ºÅÛÀÇ Æ¯¼º¿¡ ÀûÇÕÇÏ°í ÃÖÀûÀÇ ¼º´ÉÀ» °¡Áö´Â ÀûÀÀ ¾Ë°í¸®ÁòÀÌ ÇÊ¿äÇÏ°Ô µÈ´Ù. º» ³í¹®¿¡¼´Â ¹«¼± À̵¿ ä³Î¿¡¼ ¼º´ÉÀÌ ¿ì¼öÇÑ ÀâÀ½ ¿¹Ãø °áÁ¤ ±Ëȯ µîȱâ (NPDFE: Noise-Predictive Decision Feedback Equalizer)¸¦ Á¦¾ÈÇÑ´Ù. Á¦¾ÈµÈ NPDFE´Â Á÷±³ À§»ó º¯Á¶ (QPSK: Quadrature Phase Shift Keying) ¹æ½ÄÀ» »ç¿ëÇÏ´Â ½Ã½ºÅÛ¿¡ ´ëÇØ °¡»ê¼º ¹é»ö °¡¿ì½º ÀâÀ½ (AWGN: Additive White Gaussian Noise)ÀÌ ¹ß»ýÇÑ´Ù´Â ±âº» °¡Á¤ÇÏ¿¡ ¶óÀÌ½Ã¾È ÆäÀ̵ù, À¯·´ Ç¥ÁØ (ETSI: European Telecommunications Standards Institute) ÆäÀ̵ù, ±×¸®°í ·¹Àϸ® ÆäÀ̵ù ä³Î¿¡¼ÀÇ ¼º´ÉÀ» ºÐ¼®ÇÑ´Ù. ½Ã¹Ä·¹À̼ǿ¡¼ »ç¿ëµÇ´Â µîȱ⠱¸Á¶´Â ¼±Çü µîȱâ (LE: Linear Equalizer), °áÁ¤ ±Ëȯ µîȱâ (DFE: Decision Feedback Equalizer), ±×¸®°í Á¦¾ÈµÈ NPDFEÀÌ´Ù. °¢ µîÈ ¾Ë°í¸®ÁòÀ» »ç¿ëÇÏ´Â QPSK º¯Á¶ ¹æ½ÄÀÇ ¼º´É ºñ±³´Â BERÀ» ÅëÇÏ¿© ÀÌ·ç¾îÁø´Ù. |
¿µ¹®³»¿ë (English Abstract) |
Adaptive equalizers are inevitable schemes in digital communication systems for compensating the transmission channel distortion. Additionally, to obtain the required BER (Bit Error Rate), the adaptive algorithms appropriate to the mobile communication channels are required. In this paper, we propose the NPDFE (Noise-Predictive Decision Feedback Equalizer) for communication systems performance improvement in mobile communication channels. The performance of the proposed NPDFE with QPSK (Quadrature Phase Shift Keying) is simulated under AWGN (Additive White Gaussian Noise), Ricean fading, ETSI (European Telecommunications Standards Institute) fading, and Rayleigh fading channels. The equalizers used in simulations are a LE (Linear Equalizer), a DFE (Decision Feedback Equalizer), and a NPDFE. Moreover, the equalizer performance criterion of the QPSK is the BER. |
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DFE
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