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    Ezigbo nnabata nke akara dijitalụ

    Oge nzipu: Nov-05-2024

    Na usoro nkwurịta okwu dijitalụ, ihe nnata na-enweta bụ nchikota nke mgbaàmà na-ebufe na mkpọtụ ọwa.

    Ezigbo nnabata nke akara dijitalụ gbadoro ụkwụ na opekempe mperi mperi dị ka akara “kachasị mma”. Ihe kpatara njehie ndị a tụlere n'isiakwụkwọ a bụ mkpọtụ ọcha Gaussian nwere oke. N'okpuru echiche a, a na-ekewa akara ngosi dijitalụ nke ọnụọgụ abụọ n'ime ụdị atọ: mgbama doro anya, mgbama ntụkwasị obi na mgbaama mgbanwe, na ihe gbasara nke puru omume kacha nta ka a na-enyocha n'otu n'otu. Na mgbakwunye, a na-enyocha ohere njehie nke ịnata akara mgbanaka multi-base.

    Ụkpụrụ bụ isi nke nyocha bụ ịnara mkpokọta ihe nlere anya nke ihe mgbama na-anata dị ka vector na K-akụkụ na-anata oghere vector, wee kewaa oghere vector na-anata n'ime mpaghara abụọ. Kpebisie ike ma mperi emegoro dịka mpaghara vector enwetara dabara na ya. Enwere ike nweta eserese ngọngọ nke ezigbo nnata yana enwere ike gbakọọ ọnụego njehie bit site na njiri mkpebi. Ọnụego mperi nke a kacha mma n'ụzọ zuru oke, ya bụ, n'usoro iwu kacha nta enwere ike.

    A na-ekpebi ọnụọgụ mperi kacha mma nke ọnụọgụ ọnụọgụ abụọ site na ọnụọgụ ọnụọgụ p na akara ngosi-na-mkpọtụ E/n., mana enweghị mmekọrịta chiri anya na ụdị mgbama. Obere ọnụọgụ njikọ p, na-ebelata ọnụego mperi mperi. Mgbama 2PSK nwere ọnụọgụ njikọ kacha nta (p=-1) yana ọnụego mperi kacha ala. Enwere ike were akara ngosi 2FSK dị ka mgbama orthogonal nwere ọnụọgụ njikọ p=0.

    Maka mgbaàmà nwere mgbaàmà na mgbanwe, ọ bụ naanị FSK mgbaàmà ka a na-eji dị ka nyocha onye nnọchiteanya, n'ihi na n'ime ọwa a, a na-agbanwe njupụta na usoro nke mgbaàmà na-enweghị usoro n'ihi mmetụta nke mkpọtụ, ya mere mgbaàmà FSK na-adabara ngwa ngwa. Ntugharị na-adịghị agbanwe agbanwe bụ ụzọ kacha mma ịnata n'ihi mgbanwe mgbanwe nke usoro mgbaàmà nke ọwa kpatara.

    Site n'ịtụle ọnụego njehie bit nke onye na-anata n'ezie na onye nnata kacha mma, enwere ike ịhụ na ọ bụrụ na akara ngosi-na-mkpọtụ ike r na onye na-anata n'ezie hà nhata E / n nke koodu ume na ụda ike spectral. njupụta na kacha mma nnata, bit njehie ọnụego arụmọrụ nke abụọ bụ otu. Otú ọ dị, n'ihi na onye nnata n'ezie adịghị ekwe omume mgbe niile iji nweta ebe a. Ya mere, arụmọrụ nke onye na-anata ihe n'ezie na-adị ala mgbe niile na nke kacha mma.

    Nke a bụ ShenzhenHDV Fotoeletrọn Technology Ltd. na-ewetara gị banyere "kasị mma n'ikuku nke dijitalụ n'ókè", na-atụ anya na-enyere gị aka, na ShenzhenHDV Fotoeletrọn Technology Ltd. na mgbakwunye naONUusoro, usoro transceiver,OLTusoro, ma na-emepụta modul usoro, dị ka: Communication ngwa anya modul, ngwa anya nkwurịta okwu modul, netwọk ngwa anya modul, nkwurịta okwu ngwa anya modul, ngwa anya eriri modul, Ethernet ngwa anya eriri modul, wdg, nwere ike inye kwekọrọ ekwekọ àgwà ọrụ maka dị iche iche ọrụ 'mkpa. , nabata nleta gị.

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