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Medical Instrumentation #10

Medical Instrumentation #10. Electro-magnetic Spectrum, Modulation&Demodulation. 제출일 : 2014. 06. 03. 생체의공학과 2010103789 박 준 환. 1 ) Audio Frequency. 1. Electro-magnetic Spectrum. * 20 ~ 20,000 Hz ( 초음파 : 20,000Hz 보다 크다 ). 2) Radio Frequency. (1) Low Freq : 30kHz(10km) ~ 300kHz(1km)

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Medical Instrumentation #10

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  1. Medical Instrumentation #10 Electro-magnetic Spectrum, Modulation&Demodulation 제출일 : 2014. 06. 03. 생체의공학과 2010103789 박 준 환

  2. 1) Audio Frequency 1. Electro-magnetic Spectrum * 20 ~ 20,000 Hz (초음파 : 20,000Hz 보다 크다) 2) Radio Frequency (1) Low Freq : 30kHz(10km) ~ 300kHz(1km) (2) Medium Freq : 300kHz(1km) ~ 3MHz(100m) (3) High Freq : 3MHz(100m) ~ 30MHz(10m) (4) Very High Freq : 30MHz(10m) ~ 300MHz(1m) [VHF] (5) Ultra High Freq : 300MHz(1m) ~ 1GHz(0.1m) [UHF] * (3), (4) : Radio에 사용 * (4), (5) : TV 에 사용

  3. 3) Microwave(1GHz 이상) 1. Electro-magnetic Spectrum (1) Centimeter Wave : 3GHz(10cm) ~ 30GHz(1cm) (2) Milimeter Wave : 30GHz(1cm) ~ 300GHz(0.1cm) (3) Submilimeter Wave : 300GHz ~ 3THz(0.1mm) * Wave 수 / Cm = 4) Infrared(적외선) (1) Far Infrared : (2)(Intermediate) Infrared :

  4. 1. Electro-magnetic Spectrum 5) Visible Light * 빨(적,R) 주 노 초 파 남 보(자,V) 로갈수록 감소, v&E증가 6) UltraViolet 7) X-ray 8) Gamma ray

  5. 1) Baseband Signal 2. Modulation & Demodulation 예) 음성 : 20 ~ 20,000Hz, ECG : 0.5 ~ 100Hz, EEG : 0.1 ~ 30Hz * 3개의 음성 signal Amp X

  6. 2) Fourier transform 2. Modulation & Demodulation Modulation 20kHz 20kHz 20kHz Amplitude Modulation(AM)

  7. 3) Frequency Division Multiplexing(FDM) 2. Modulation & Demodulation Amp X LPF

  8. 3) Frequency Division Multiplexing(FDM) 2. Modulation & Demodulation * : 내가 고를 주파수 Filtering Filtering Filtering : 진폭이 절반인 고를 주파수만 남아 있음 Frequency Division Multiplexing(FDM)

  9. 4) Time Division Multiplexing(TDM) : Digital 에서 가능 2. Modulation & Demodulation Switch Switch . . . . 0 1 1 0 0 1 1 0 Digital 무선통신 기술

  10. 감사합니다.

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