Txoj hauv kev yooj yim ntawm binary digital modulation yog: binary amplitude keying (2ASK) - amplitude hloov ntawm lub teeb liab nqa; Binary zaus hloov pauv keying (2FSK) - qhov hloov pauv zaus ntawm cov teeb liab thauj khoom; Binary theem hloov pauv keying (2PSK) - Theem hloov ntawm cov teeb liab nqa. Vim tias theem tsis paub tseeb hauv 2PSK system, qhov sib txawv theem-hloov keying 2DPSK tau tsim.
Qhov bandwidth xav tau los ntawm 2ASK thiab 2PSK yog ob zaug tus lej lej. 2FSK yuav tsum muaj bandwidth ntau dua li 2ASK thiab 2PSK.
Qhov kev ua yuam kev me ntsis ntawm ntau yam binary digital modulation systems nyob ntawm lub teeb liab rau suab nrov piv (SNR) ntawm tus demodulator. Nyob rau hauv cov nqe lus ntawm anti-additive dawb Gaussian suab nrov, coherent 2PSK muaj qhov ua tau zoo tshaj plaws, ua raws li 2FSK, thiab 2ASK muaj qhov ua tau zoo tshaj plaws.
ASK yog ib qho ntawm cov qauv kev hloov kho thaum ntxov. Nws qhov zoo yog cov cuab yeej siv yooj yim thiab siv ntau zaus band; Qhov tsis zoo yog qhov kev ua haujlwm tsis zoo ntawm lub suab nrov yog qhov tsis zoo, thiab nws muaj kev nkag siab rau kev hloov pauv ntawm cov yam ntxwv channeltics, thiab nws tsis yog ib qho yooj yim los ua tus qauv kev txiav txim siab ntes ua haujlwm hauv lub xeev qhov kev txiav txim zoo tshaj plaws.
FSK yog ib qho kev hloov pauv tsis tseem ceeb hauv kev sib txuas lus digital. Nws qhov zoo dua yog tias nws muaj peev xwm tiv thaiv kev cuam tshuam thiab tsis cuam tshuam los ntawm kev hloov pauv channel, yog li FSK tshwj xeeb tshaj yog tsim rau fading raws. Qhov tsis zoo yog tias cov kab hluav taws xob nyob hauv dav dav, tshwj xeeb tshaj yog MF-SK, thiab kev siv band zaus tsawg. Tam sim no, zaus modulation system yog siv nyob rau hauv nruab nrab thiab qis ceev cov ntaub ntawv kis tau tus mob.
PSK lossis DPSK yog hom kev hloov pauv uas muaj kev sib kis tau zoo, nws lub peev xwm los tiv thaiv lub suab nrov muaj zog dua li ASK thiab FSK, thiab nws tsis yooj yim cuam tshuam los ntawm kev hloov pauv ntawm cov yam ntxwv channel, yog li nws tau siv dav hauv cov ntaub ntawv ceev thiab nruab nrab. . Tsis muaj theem hloov (PSK) muaj qhov teeb meem ntawm cov cab kuj theem tsis meej pem hauv coherent demodulation, yog li nws tsis tshua muaj siv hauv kev xa ncaj qha hauv kev xyaum. MDPSK yog siv ntau dua.
Cov saum toj no yog tsab xov xwm "Binary digital modulation" coj los ntawm Shenzhen HDV Phoelectron Technology Co., LTD. Nws yog cov chaw tsim khoom tshwj xeeb hauv cov khoom siv sib txuas lus raws li cov khoom tseem ceeb, xws liONUseries khoom:OLT ONU, ACONU, Kev sib txuas lusONU, optical fiber ntauONU, CATVONU, GPONONU, XPOONU, thiab lwm yam, cov khoom siv saum toj no tuaj yeem siv rau cov xwm txheej ntawm lub neej sib txawv, thiab sib xwsONUseries khoom tuaj yeem kho raws li lawv tus kheej xav tau. Peb lub tuam txhab tuaj yeem muab kev txhawb nqa kev tshaj lij thiab zoo tshaj plaws. tos ntsoov rau koj mus ntsib.
