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8051 microcontroller¸¦ ÀÌ¿ëÇÑ filter design

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ÀÚ·á¼³¸í
8051 microcontroller¿Í Compact51°ú C¾ð¾î¸¦ ÀÌ¿ëÇÏ¿©,
FIR°ú IIR filter¸¦ µðÀÚÀÎ ¹× ½ÇÇèÇÏ¿´½À´Ï´Ù.

noise°¡ ³¢¾î ÀÖ´Â wav(¿þÀ̺ê) ÆÄÀÏÀÇ noise ´ë¿ªÀ»
FIR, IIR filter¸¦ ÀÌ¿ëÇÏ¿© ÇÊÅ͸µ ÇÏ´Â °úÁ¤ÀÌ µé¾îÀÖ½À´Ï´Ù.

°á°úÀûÀ¸·Î wave ÆÄÀÏ¿¡ ³¢¾î ÀÖ´Â ³ëÀÌÁî Á¦°Å¿¡ ¼º°øÇÏ¿´½À´Ï´Ù.

filter Á¾·ù¸¦ ¿©·¯°¡Áö¸¦ Àû¿ëÇÏ¿© ¾î¶² filter°¡ È¿À²ÀûÀÎÁöµµ ºÐ¼®ÇÏ¿´½À´Ï´Ù.
Àû¿ëÇÑ ÇÊÅÍ Á¾·ù´Â mean filter, hamming, boxcar, kaiser µîÀÔ´Ï´Ù.

º¸°í¼­ÀÇ ³»¿ëÀº óÀ½ ½ÇÇèÀÇ ¸ñÀûºÎºÐ¸¸ ¿µ¹®ÀÌ°í,
º» ³»¿ëÀº ÇѱÛÀÔ´Ï´Ù. ¿©·¯°¡Áö »çÁø°ú ±×·¡ÇÁ ÀÚ·áµéÀÌ ÇÔ²² ÷ºÎµÇ¾î ÀÖ½À´Ï´Ù.

ÃÖÁ¾ÀûÀ¸·Î A+ ¹Þ¾Ò½À´Ï´Ù.

cf) C¾ð¾î·Î ÀÛ¼ºÇÏ¿´±â ¶§¹®¿¡ ´Ù¸¥ embedded board¿¡¼­µµ »ç¿ë °¡´ÉÇϸç,
PC¿¡¼­µµ »ç¿ë °¡´ÉÇÕ´Ï´Ù.
¸ñÂ÷/Â÷·Ê
2. Problem Statement

(1) Design and implement digital FIR and IIR filters for filtering audio signal

(2) Investigate the signal distortion depending on sampling rate

3. Pre-report
(1) Investigate the characteristics of the ¡®mean filter given by the following input/output difference equation.
Stopband¿¡¼­ rippleÀÌ ¹ß»ýÇÏ¿´´Ù. Â÷¼ö°¡ ³ô¾ÆÁú¼ö·Ï magnitude ÀÀ´äÀº ideal¿¡ °¡±î¿öÁöÁö¸¸ phaseÀÀ´äÀº distortionÀÌ ½ÉÇØÁø´Ù.
IIR filterÀÇ Butterworth, Chebyshev type1, Chebyshev type2¸¦ ºñ±³ÇØ º¸¾ÒÀ¸¸ç, °¢°¢ÀÇ 3rd , 5th orderµµ ÇÔ²² ºñ±³Çغ¸¾Ò´Ù. Order °¡ ³ô¾ÆÁú¼ö·Ï magnitudeÀÇ ÀÀ´äÀº ideal¿¡ °¡±î¿üÁö¸¸ phaseÀÀ´ä ¸é¿¡¼­´Â distortionÀÌ ½ÉÇÏ°Ô ÀϾ´Ù.

¨é Design the 3rd and 5th order FIR filters by window method using MATLAB. Use Hamming, Boxcar, Bartlett, Blackman and Kaiser window. Explain how the characteristics of the filters are attached by the order.(Use freqz(), fir1(), hamming(), boxcar(), ¡¦, kaiser() functions.)

FIR filter¸¦ ¼³°èÇÒ ¶§´Â window ÇÔ¼ö¸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ý°ú ÁÖÆļö¸¦ »ùÇøµ ÇÏ´Â ¹æ¹ýÀ¸·Î Å©°Ô µÎ °¡Áö·Î ³ª´­ ¼ö ÀÖ´Ù. À̹ø ½ÇÇè¿¡¼­´Â window ÇÔ¼ö¸¦ »ç¿ëÇØ FIR filter¸¦ µðÀÚÀÎ ÇÏ¿´´Ù. Window ÇÔ¼ö¸¦ ÀÌ¿ëÇØ µðÀÚÀÎÇÑFIR filter´Â ´ÙÀ½°ú °°Àº Ư¡À» °®´Â´Ù.

1. ¹«ÇÑ ÀÓÆÞ½º ÀÀ´äÀ» °®´Â ÀÌ»óÀûÀÎ LPF(Low pass filter) ÀÇ Àü´ÞÇÔ¼ö¿¡ Á¤ÇØÁø window ÇÔ¼ö¸¦ convolutionÇÏ¿© ¿øÇϴ Ư¼ºÀÇ Àü´Þ ÇÔ¼ö¸¦ ¾òÀ» ¼ö ÀÖ´Ù.

2. ½Ã°£ ¿µ¿ª¿¡¼­´Â ÀÌ»óÀû LPFÀÇ ÀÓÆÞ½º ÀÀ´ä¿¡

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ÀÚ·áÁ¤º¸
ID : schw****
Regist : 2010-08-10
Update : 2010-08-10
FileNo : 11003847

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FIR   IIR   mean   filter   hamming   boxcar   8051   microcontroller   ÀÌ¿ëÇÑ   design   lab5  


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