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Current Result Document :
ÇѱÛÁ¦¸ñ(Korean Title) |
¹«¼±ÀÎÁö½Ã½ºÅÛÀ» À§ÇÑ Kullback-Leiber Divergence ±â¹ÝÀÇ ½ºÆåÆ®·³ ¼¾½Ì ±â¹ý |
¿µ¹®Á¦¸ñ(English Title) |
A Kullback-Leiber Divergence-based Spectrum Sensing for Cognitive Radio Systems |
ÀúÀÚ(Author) |
Å¥ ¼ö¾È Ãà
±¸Àμö
Thuc Kieu-Xuan
Insoo Koo
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¿ø¹®¼ö·Ïó(Citation) |
VOL 13 NO. 01 PP. 0001 ~ 0006 (2012. 02) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â ¹«¼±ÀÎÁö½Ã½ºÅÛ¿¡¼ È¿À²ÀûÀ¸·Î ½ºÆåÆ®·³ ¼¾½ÌÀ» ¼öÇàÇϱâ À§ÇØ, È®·ü ºÐÆ÷ »çÀÌÀÇ ´ë¼ö Â÷¸¦ ÃøÁ¤ÇÏ´Â Kullback-Leiber divergence±â¹ÝÀÇ »õ·Î¿î ½ºÆåÆ®·³ ¼¾½Ì ±â¼úÀ» Á¦¾ÈÇÑ´Ù. Á¦¾ÈµÈ ¼¾½Ì ±â¹ýÀº ƯÁ¤ ¼¾½Ì ±¸°£¿¡¼ÀÇ ±¹ºÎ ¼¾½Ì ÃøÁ¤°ªµéÀÌ ÀâÀ½ ºÐÆ÷¿¡¼ ¹ß»ýÇÏ¿´´ÂÁö, ±â»ç¿ëÀÚ ½ÅÈ£¿¡¼ ¹ß»ýÇÏ¿´´ÂÁö¸¦ Kullback-Leiber divergenc¸¦ ÀÌ¿ëÇÏ¿© ÆÇ´ÜÇÑ´Ù. ½Ã¹Ä·¹À̼ÇÀ» ÅëÇØ, Á¦¾ÈµÈ Kullback-Leiber divergence±â¹ÝÀÇ ½ºÆåÆ®·³ ¼¾½Ì ±â¹ýÀÌ µ¿ÀÏ Á¶°Ç¿¡¼ ¿¡³ÊÁö °ËÃâ ±â¹ÝÀÇ ½ºÆåÆ®·³ ¼¾½Ì ±â¹ýº¸´Ù ´õ ÁÁÀº ¼º´ÉÀ» Á¦°øÇÒ ¼ö ÀÖÀ½À» º¸¿´´Ù. ƯÈ÷, ÆäÀ̵ù ȯ°æ ¹× ±â»ç¿ëÀÚ ½ÅÈ£ÀÇ SNR°ªÀÌ ³·Àº °æ¿ì¿¡ ¿¡³ÊÁö °ËÃâ ±â¹ÝÀÇ ½ºÆåÆ®·³ ¼¾½Ì ±â¹ý°ú ºñ±³ÇÒ ¶§ Á¦¾ÈµÈ ±â¹ýÀÇ ¼º´ÉÀÌ Å©°Ô Çâ»óµÊÀ» º¸¿´´Ù.
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¿µ¹®³»¿ë (English Abstract) |
In the paper, an information divergence called Kullback-Leiber divergence, which measures the average of the logarithmic difference between two probability density functions, is utilized to derive a novel method for spectrum sensing in cognitive radio systems. In the proposed sensing method, we test whether the observed samples are drawn from the noise distribution by using Kullback-Leiber divergence. It is shown by numerical results that under the same conditions, the proposed Kullback-Leiber divergence-based spectrum sensing always outperforms the energy detection based spectrum sensing significantly, especially in low SNR regime and in fading circumstance.
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Å°¿öµå(Keyword) |
Cognitive radio
spectrum sensing
Kullback-Leiber divergence
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