Fig. 6-6 bụ ihe osise ngọngọ nke usoro mgbasa ozi baseband dijitalụ na-ahụkarị. Ihe mejupụtara ya bụ ihe nzacha nnyefe (ihe na-emepụta mgbaàmà ọwa), ọwa, nzacha nnabata, na onye na-ekpebi ihe nlele. Iji hụ na a pụrụ ịdabere na ya na ịrụ ọrụ nke usoro ahụ, ekwesịrị inwe usoro mmekọrịta.
A na-akọwa nkenke ọrụ nke ngọngọ ọ bụla na ọnụ ọgụgụ ahụ na usoro anụ ahụ nke nnyefe mgbaàmà dị ka ndị a:
(1) Mgbama ọwa mbụ (nzacha nnyefe). Ọrụ ya bụ ịmepụta ebili mmiri mgbama baseband kwesịrị ekwesị maka nnyefe ọwa. N'ihi na ntinye ya n'ozuzu bụ koodu nnyefe nke ụdị koodu koodu na-emepụta, ụdị ebili mmiri kwekọrọ na-abụkarị akụkụ akụkụ anọ, na ụdịdị ya dị obosara nke ukwuu, nke na-adịghị akwado nnyefe. A na-eji ihe nzacha nnyefe ahụ mpikota onu mgbama ntinye ma gbanwee koodu nnyefe ka ọ bụrụ ihe mgbama baseband dabara adaba maka nnyefe ọwa.
(2) Ọwa. Ọ bụ ihe na-enye ohere ka akara ngosi baseband gafere, na-abụkarị ọwa wired, dị ka ụzọ gbagọrọ agbagọ, eriri coaxial, wdg. Njirimara nnyefe nke ọwa n'ozuzu anaghị ezute ọnọdụ nnyefe na-enweghị mgbagha, ya mere, ntụgharị ntụgharị ga-adị. agbagọ. Na mgbakwunye, a na-ewebata mkpọtụ n (T) n'ime ọwa ahụ, a na-eche na ọ bụ ụda ọcha Gaussian nke nwere uru efu nke efu.
(3) Ihe nzacha nnabata A na-eji ya anata akara, na-ehichapụ mkpọtụ ọwa na nnyonye anya ndị ọzọ dị ka o kwere mee, hazie njirimara ọwa, wee mee ka ihe nrụpụta baseband dị mma maka nlere mkpebi.
(4) Onye nhọpụta ihe atụ. Ọ bụ ịlele ma chọpụta mmepụta ebili mmiri nke nzacha nnabata n'oge a kara aka (nke oge ntakịrị oge na-achịkwa) iji nwetaghachi ma ọ bụ mepụtaghachi akara ngosi baseband n'okpuru ndabere nke njirimara nnyefe na-adịghị mma na mkpọtụ.
(5) A na-esi na mgbama anatara site na sekit mmịpụta synchronous. Izi ezi nke oge bit ga-emetụta nsonaazụ mkpebi ozugbo.
Nke a bụ ihe mejupụtara sistemụ mgbasa ozi baseband dijitalụ nke Shenzhen HDV Phoelectron Technology Co., Ltd. wetara gị. Enwere m olileanya na isiokwu a nwere ike inyere gị aka ịbawanye ihe ọmụma gị. E wezụga nke a isiokwu ma ọ bụrụ na ị na-achọ ezigbo ngwa anya eriri nkwurịta okwu akụrụngwa emeputa ụlọ ọrụ ị nwere ike tụleegbasara anyị.
Shenzhen HDV photoelectric Technology Co., Ltd bụ tumadi a emeputa nke nkwurịta okwu ngwaahịa. Ka ọ dị ugbu a, akụrụngwa a na-emepụta na-ekpuchiUsoro ONU, ngwa anya modul usoro, Usoro OLT, nausoro transceiver. Anyị nwere ike ịnye ọrụ ahaziri maka ọnọdụ dị iche iche. A na-anabata gịndụmọdụ.
