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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Åë½ÅÇÐȸ ³í¹®Áö (The Journal of Korea Information and Communications Society)

Çѱ¹Åë½ÅÇÐȸ ³í¹®Áö (The Journal of Korea Information and Communications Society)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) Oblique Iterative Hard Thresholding ¾Ë°í¸®ÁòÀ» ÀÌ¿ëÇÑ ¾ÐÃà ¼¾½ÌÀÇ º¸ÀåµÈ Sparse º¹¿ø
¿µ¹®Á¦¸ñ(English Title) Guaranteed Sparse Recovery Using Oblique Iterative Hard Thresholding Algorithm in Compressive Sensing
ÀúÀÚ(Author) ÀÀÀ¢¶Ñ¶û³ì   Á¤È«±Ô   ½Å¿ä¾È   Thu L. N. Nguyen   Honggyu Jung   Yoan Shin  
¿ø¹®¼ö·Ïó(Citation) VOL 39A NO. 12 PP. 0739 ~ 0745 (2014. 12)
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(Korean Abstract)
¾ÐÃà ¼¾½Ì¿¡¼­ ÃøÁ¤ Çà·Ä ÀÇ 3-Restricted Isometry Constant°¡ ȤÀº º¸´Ù ÀÛ´Ù¸é ¸ðµç -Sparse º¤ÅÍ ´Â ÃøÁ¤ º¤ÅÍ ¶Ç´Â ÀâÀ½ÀÌ ¼¯ÀÎ º¤ÅÍ ·ÎºÎÅÍ Iterative Hard Thresholding (IHT) ¾Ë°í¸®Áò¿¡ ÀÇÇØ º¹¿øµÉ ¼ö ÀÖ´Ù. ÇÏÁö¸¸, ÀÌ·¯ÇÑ º¹¿øÀº ½ÅÈ£ ȹµæ ±â¹ýÀÇ Æ¯Á¤ÇÑ °¡Á¤ ÇÏ¿¡¼­ ½ÇÁúÀûÀÎ ¾Ë°í¸®Áòµé¿¡ ÀÇÇØ º¸ÀåµÈ´Ù. º¹¿øÀ» À§ÇÑ ÇÙ½ÉÀûÀÎ °¡Á¤ Áß¿¡ Çϳª´Â ÃøÁ¤ Çà·ÄÀÌ Restricted Isometry Property (RIP)¸¦ ¸¸Á·Çؾ߸¸ ÇÏ´Â °ÍÀε¥, ÀÌ Á¶°ÇÀº ¾ÐÃà ¼¾½ÌÀÇ ½ÇÁ¦ ÀÀ¿ë ȯ°æ¿¡¼­ Á¾Á¾ ¸¸Á·µÇÁö ¾Ê´Â´Ù. º» ³í¹®¿¡¼­´Â À̹漺 (Anisotropic) °æ¿ì¿¡¼­ Restricted Biorthogonality Property (RBOP)·Î ºÒ¸®´Â RIPÀÇ ÀϹÝÈ­¿Í Oblique PursuitÀ¸·Î ºÒ¸®´Â »õ·Î¿î º¹±¸ ¾Ë°í¸®ÁòµéÀ» ºÐ¼®ÇÑ´Ù. ¶ÇÇÑ, IHT ¾Ë°í¸®ÁòµéÀ» À§ÇØ Restricted Biorthogonality ConstantÀÇ °üÁ¡¿¡¼­ ¼º°øÀûÀÎ Sparse ½ÅÈ£ º¹¿ø¿¡ ´ëÇÑ ºÐ¼®À» Á¦½ÃÇÑ´Ù.
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(English Abstract)
It has been shown in compressive sensing that every -sparse can be recovered from the measurement vector or the noisy vector via -minimization as soon as the -restricted isometry constant of the sensing matrix is smaller than or smaller than by applying the Iterative Hard Thresholding (IHT) algorithm. However, recovery can be guaranteed by practical algorithms for some certain assumptions of acquisition schemes. One of the key assumption is that the sensing matrix must satisfy the Restricted Isometry Property (RIP), which is often violated in the setting of many practical applications. In this paper, we studied a generalization of RIP, called Restricted Biorthogonality Property (RBOP) for anisotropic cases, and the new recovery algorithms called oblique pursuits. Then, we provide an analysis on the success of sparse recovery in terms of restricted biorthogonality constant for the IHT algorithms.
Å°¿öµå(Keyword) Compressive Sensing   Biorthogonality   Oblique Projection   Restricted Isometry Property   Iterative Hard Thresholding  
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