Attenuation vs Distortion
Attenuation thiab distortion yog ob qhov sib txawv tsis xav tau ntawm cov teeb liab. Cov txheej txheem yog tsim los txo cov txiaj ntsig ntawm ob qhov xwm txheej no. Hauv kev sib txuas lus, yog tias tsis hais kom raug, kev txo qis thiab kev cuam tshuam muaj peev xwm ua kom cov ntaub ntawv hloov pauv tsis tiav.
Nyob zoo ib tsoom niam txiv kwv tij neej tsas sawv daws
Attenuation tuaj yeem paub tias yog lub zog poob ntawm lub teeb liab taug kev los ntawm txhua qhov xov xwm. Nws yog ib qho phenomenon thiab tshwm sim vim yoj yam ntxwv xws li refraction, reflection thiab diffraction. Piv txwv li, suab nthwv dej uas muaj peb lub suab tsis tuaj yeem hnov ntau qhov deb vim yog kev txo qis.
Naturally, attenuation tshwm sim exponentially nrog rau kev mus ncig. Li no, feem ntau ntsuas hauv decibels ib chav tsev ntev, uas yog ib chav logarithmic. Amplifiers yog siv los tshem tawm cov nyhuv ntawm attenuation thiab repeaters yog siv los xa cov teeb liab reconstructed.
Distortion
Distortion yog lub npe hu ua kev hloov pauv ntawm thawj lub teeb liab. Qhov no yuav tshwm sim vim yog cov khoom ntawm qhov nruab nrab. Muaj ntau ntau hom kev distortion xws li amplitude distortion, harmonic distortion, thiab theem distortion. Rau electromagnetic tsis polarization distortions kuj tshwm sim. Thaum lub distortion tshwm sim, cov duab ntawm lub waveform hloov.
Piv txwv li, amplitude distortion tshwm sim yog tias txhua qhov ntawm cov teeb liab tsis sib npaug. Qhov no tshwm sim hauv kev xa xov wireless vim qhov nruab nrab tau hloov pauv los ntawm lub sijhawm. Cov neeg txais yuav tsum muaj peev xwm txheeb xyuas cov kev cuam tshuam no.
Dab tsi yog qhov txawv ntawm attenuation thiab distortion?
1. Txawm hais tias scaled down nyob rau hauv amplitude, cov duab ntawm waveform tsis hloov nyob rau hauv attenuation tsis zoo li nyob rau hauv distortion.
2. Kev tshem tawm cov teebmeem ntawm attenuation yog yooj yim dua li tshem tawm cov teebmeem distortion.
3. Yog hais tias qhov attenuation tshwm sim ntau npaum li cas rau qhov sib txawv ntawm lub teeb liab, nws yog distortion.
