Digital Signal Processing(DSP) : 203 : 0531-88364509 Email: jiangmingyan@sdu.edu.cn : ---- ---- JMY Copyright Reserved, SDU, 1 / 69
: (,, 2007 64 48 16 1 8 1. 2 2. 6 3. 6 4. 8 5., FFT 8 6. 6 7. 8 8. 4 JMY Copyright Reserved, SDU, 2 / 69
MATLAB Internet ( + )50 50% JMY Copyright Reserved, SDU, 3 / 69
: Mitra,. ( ) [ ]A.V.. Signal Processing, Sophocles J.Orfanids,. MATLAB,.K..G.,. MATLAB -. JMY Copyright Reserved, SDU, 4 / 69
: 20 60, DSP (FFT) JMY Copyright Reserved, SDU, 5 / 69
(DSP) (Digital Signal Processing) DSP: Digital Signal Processor Digital Signal Processing DSP JMY Copyright Reserved, SDU, 6 / 69
(signal), ---> ---> ---> ( )---> ---> ( ) JMY Copyright Reserved, SDU, 7 / 69
(analog signal) (digital signal) ( ) JMY Copyright Reserved, SDU, 8 / 69
x(t) x(tn) x(n) t tn n JMY Copyright Reserved, SDU, 9 / 69
, JMY Copyright Reserved, SDU, 10 / 69
( ) ( ) JMY Copyright Reserved, SDU, 11 / 69
(1-D) : (2-D) : (M-D) : Away 256Hz JMY Copyright Reserved, SDU, 12 / 69
(EEG) JMY Copyright Reserved, SDU, 13 / 69
3-30kHz:Very low frequency VLF( ) 30-300kHz:Low frequency LF( ) 300~3000kHz:Medium frequency( ) 3-30MHz:High frequency(hf)( ) 30-300MHz:Very High frequency(vhf)( FM VHF ) 0.3~3GHz:Ultra high frequency(uhf)(uhf ) 20Hz ( VLF Very low frequency) 20Hz~20KHz Low frequency ( LF) >20KHz ( LF) JMY Copyright Reserved, SDU, 14 / 69
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x(t) y(t) JMY Copyright Reserved, SDU, 16 / 69
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xa(t) A/D D/A ADC DSP DAC ya(t) JMY Copyright Reserved, SDU, 18 / 69
/ JMY Copyright Reserved, SDU, 19 / 69
/ JMY Copyright Reserved, SDU, 20 / 69
(time domain): (frequency domain) spectrum FFT JMY Copyright Reserved, SDU, 21 / 69
C CEG JMY Copyright Reserved, SDU, 22 / 69
(low pass filter) (high pass filter) (band pass filter) (band stop filter) (cut-off frequency): JMY Copyright Reserved, SDU, 23 / 69
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CEG CEG CE C JMY Copyright Reserved, SDU, 25 / 69
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1965 Cooley-Turkey (FFT) 17 --18 (LSI) (DFT) JMY Copyright Reserved, SDU, 30 / 69
A/D,D/A DFT, FFT : FFT : : : AR MA ARMA : JMY Copyright Reserved, SDU, 31 / 69
1. : 2. : 3. DSP : DSP ( FFT ) Texas Instrument IT Analog Devices Lucent Motorola AT&T 4. DSP : FFT,FIR JMY Copyright Reserved, SDU, 32 / 69
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(ASP) JMY Copyright Reserved, SDU, 34 / 69
1. 10-3 17 10-5 JMY Copyright Reserved, SDU, 35 / 69
2. 0 1 JMY Copyright Reserved, SDU, 36 / 69
3. JMY Copyright Reserved, SDU, 37 / 69
4. ( ) Hz~ Hz ( JMY Copyright Reserved, SDU, 38 / 69
5. DSP DSP JMY Copyright Reserved, SDU, 39 / 69
6. 10Hz ( ) 10-3 Hz JMY Copyright Reserved, SDU, 40 / 69
7. JMY Copyright Reserved, SDU, 41 / 69
8. ( ) JMY Copyright Reserved, SDU, 42 / 69
20 60 JMY Copyright Reserved, SDU, 43 / 69
( / ) 1,,, ; 2,, ; 3,, JMY Copyright Reserved, SDU, 44 / 69
, 1, 2 3 4 JMY Copyright Reserved, SDU, 45 / 69
DSP 1. 2. 3. 4. DSP CPU PC JMY Copyright Reserved, SDU, 46 / 69
DSP / JMY Copyright Reserved, SDU, 47 / 69
1. 50 ( (CD,VCD,DVD) JMY Copyright Reserved, SDU, 48 / 69
2. 1 JMY Copyright Reserved, SDU, 49 / 69
3. ( ) ( ) ( ) JMY Copyright Reserved, SDU, 50 / 69
4. JMY Copyright Reserved, SDU, 51 / 69
5. PCM ADPCM CCITT JMY Copyright Reserved, SDU, 52 / 69
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8. CT / CAT CT X CT EMI CAT: X JMY Copyright Reserved, SDU, 55 / 69
DSP DSP 1. DSP TMS320C2x /5x /6x. CPU DSP DSP 2. JMY Copyright Reserved, SDU, 56 / 69
DSP 3. 18 4. DSP DSP JMY Copyright Reserved, SDU, 57 / 69
DSP JMY Copyright Reserved, SDU, 58 / 69
1. 2. VLSI 3. 4. 5. 6. JMY Copyright Reserved, SDU, 59 / 69
1. 2. 3. JMY Copyright Reserved, SDU, 60 / 69
DSP JMY Copyright Reserved, SDU, 61 / 69
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(DSP) (Digital Signal Processing) JMY Copyright Reserved, SDU, 63 / 69
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xa(t) A/D D/A ADC DSP DAC ya(t) JMY Copyright Reserved, SDU, 65 / 69
1. 2. 3. DSP 4. DSP JMY Copyright Reserved, SDU, 66 / 69
(ASP) JMY Copyright Reserved, SDU, 67 / 69
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DSP DSP JMY Copyright Reserved, SDU, 69 / 69