Architecture
°ÇÃà Architecture


³ªÀÌÄû½ºÆ® »ùÇøµ ¹ýÄ¢(Niquist Sampling)

ÀÛ¼ºÀÚ Uploader : pnccc ÀÛ¼ºÀÏ Upload Date: 2008-08-16º¯°æÀÏ Update Date: 2008-08-16Á¶È¸¼ö View : 3773

ÇÑÁ¤µÈ ´ë¿ªÀÇ ÁÖÆļö¸¦ °®´Â ÇÔ¼öÀÇ °æ¿ì, ÀûÀýÇÑ »ùÇøµ °£°ÝÀ» ÃëÇÏ¸é »ùÇøµ °úÁ¤¿¡¼­ ¾Æ¹«·± Á¤º¸ÀÇ À¯½Çµµ ¾øÀÌ ¿ÏÀüÇÏ°Ô Àç»ýµÉ ¼ö ÀÖ´Ù´Â ÀÌ·Ð. ÀÌ ¶§ ƯÁ¤ ÁÖÆļö ¼ººÐÀÇ ÇÑ »çÀÌŬÀ» Á¦´ë·Î ³ªÅ¸³»±â À§Çؼ­´Â Àû¾îµµ 2°³ ÀÌ»óÀÇ »ùÇÃÀÌ ÀÖ¾î¾ß ÇÑ´Ù. »þ³í Á¤¸®, Ä«µð³¯ Á¤¸® ¶Ç´Â ³ªÀÌÄû½ºÆ® Á¤¸®¶ó°íµµ ÇÑ´Ù.
»ùÇøµ(Sampling) ¹ýÄ¢¿¡ ÀÇÇÏ¸é »ùÇøµ ÁÖÆļö fs ´Â ½ÅÈ£ÀÇ ÃÖ´ëÁÖÆļö ¼ººÐÀÇ µÎ ¹è ÀÌ»óÀÌ µÇ¾î¾ß ÇÑ´Ù.  ÀÌ´Â fs/2 ÀÌ»óÀÇ ÁÖÆļö ¼ººÐ¿¡¼­´Â Áßø (Folding) Çö»óÀÌ ¹ß»ýÇÏ¿© ¾Ù¸®¾î½Ì(Aliasing) Çö»óÀÌ ¹ß»ýÇϱ⠶§¹®À̸ç, À̶§ fs/2¸¦ Áßø(Folding) ÁÖÆļö ¶Ç´Â ³ªÀÌÅ°½ºÆ® ÁÖÆļö¶ó ºÎ¸¥´Ù.

µðÁöÅ» ½ÅÈ£ºÐ¼®(Digital Signal Processing)½Ã, ÀԷ½ÅÈ£¸¦ A/D º¯È¯±â¿¡ ÀÇÇÏ¿© µðÁöŻȭ ÇÒ ¶§ N °³ÀÇ ÀÌ»êÈ­°ª(Discrete Value)À¸·Î ±â·ÏµÈ´Ù.  »ùÇøµ ÁÖÆļö(fs), ³ªÀÌÅ°½ºÆ® ÁÖÆļö(fo), ºÐÇØ´É ÁÖÆļö(Frequency Resolution,f) »çÀÌÀÇ ±âº»ÀûÀÎ °ü°è½ÄÀº ´ÙÀ½°ú °°´Ù.


*** Âü°í¹®Çå[References] ***

f1 = f2 / 2
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º¯¼ö¸í Variable º¯¼ö°ª Value º¯ ¼ö ¼³ ¸í Description of the variable


¡Ø ÀÌ »çÀÌÆ®´Â ±¤°í¼öÀÍÀ¸·Î ¿î¿µµË´Ï´Ù.

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  • fo °¡ Æ÷ÇÔµÈ ±âº»½ÄÀº ¾îµð¿¡???

    m3d29
    [2008-07-17 10:48:21]
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