A cikin tsarin sadarwar dijital, mai karɓa yana karɓar jimlar siginar da aka watsa da hayaniyar tashoshi.
Themafi kyau duka liyafarna sigina na dijital bisa ma'aunin "mafi kyau" tare da mafi ƙarancin yuwuwar kuskure. Kurakurai da aka yi la'akari da su a cikin wannan babin galibi saboda amo na Gaussian mai iyaka. Ƙarƙashin wannan zato, siginar da aka gyara na dijital na binary ya kasu zuwa nau'i uku: tabbataccen sigina, sigina mai dogaro da lokaci, da sigina mai jujjuyawa. Ana bincika mafi ƙarancin yuwuwar yiwuwar kuskure da ƙima. Bugu da kari, ana kuma nazarin yiwuwar kuskuren karɓar sigina na maɓalli masu yawa.
Theainihin ka'idar bincikeshine la'akari da duk samfuran da aka zayyana na alamar siginar da aka karɓa azaman vector a cikin k-dimensional samu sararin sararin samaniya da raba sararin samaniyar da aka karɓa zuwa yankuna biyu. Ana ƙayyade ko kuskure ya faru ko a'a bisa ga yankin da vector da aka karɓa ya shiga. Za'a iya samun tsarin toshe ƙa'idar mafi kyawun mai karɓa kuma ana iya ƙididdige ƙimar kuskuren ta hanyar ma'aunin yanke shawara. Wannan adadin kuskuren birki shine mafi kyawu a ka'ida-wato, mafi ƙanƙanta a ka'ida.
Thekuskure mafi kyau dukaƙimar siginar ƙayyadaddun ƙayyadaddun binary an ƙaddara ta hanyar haɗin kai p na alamomin biyu da siginar-zuwa-amo rabo E/n, amma ba shi da alaƙa kai tsaye tare da siginar kalaman. Karamin haɗin haɗin p, ƙananan ƙimar kuskuren bit. Matsakaicin daidaitawar siginar 2PSK ita ce mafi ƙanƙanta (p = -1), kuma ƙimar kuskurensa shine mafi ƙanƙanta. Ana iya ɗaukar siginar 2FSK a matsayin siginar quadrature kuma ƙimar haɗin kai shine p = 0.
Dominsigina mai biyo bayan lokacida sigina mai jujjuyawa, kawaiFarashin FSKAna amfani da shi azaman wakilin don bincike, saboda a cikin wannan tashar, girman girman sigina da lokaci na siginar suna canzawa ba da gangan ba saboda tasirin amo, don haka siginar FSK ya fi dacewa da aikace-aikacen. Tunda tashar tana haifar da sauye-sauye na bazuwar a lokacin sigina, ba za a iya amfani da madaidaicin juzu'i ba. Madadin haka, lalatawar rashin daidaituwa shine hanya mafi kyau don karɓar siginar.
Idan aka kwatanta da ƙimar kuskuren bit na ainihin mai karɓa da kumamafi kyau duka mai karɓa, Ana iya ganin cewa idan rabon siginar-zuwa-amo ikon rabo r a cikin ainihin mai karɓa yana daidai da rabon makamashin alamar zuwa ƙarar ƙarfin sauti a cikin mafi kyawun mai karɓar E / n, ƙimar kuskuren bit na aikin biyu iri daya ne. Koyaya, wannan ba koyaushe yana yiwuwa ba saboda ainihin masu karɓa. Don haka, ainihin aikin mai karɓa koyaushe yana da muni fiye da na mafi kyawun mai karɓa.
Wannan shine abin da Shenzhen HDV Phoelectron Technology Co., Ltd. zuwa gare ku. yana kawo muku "Mafi kyawun liyafar siginar dijital". Ina fatan wannan labarin zai iya taimaka muku wajen haɓaka ilimin ku. Bayan wannan labarin idan kuna neman ingantaccen kamfanin kera kayan sadarwar fiber na gani za ku iya la'akari da sugame da mu.
Shenzhen HDV Photoelectric Technology Co., Ltd.galibi ƙera samfuran sadarwa ne. A halin yanzu, kayan aikin da aka samar sun rufejerin ONU, na gani module jerin, Hanyoyin ciniki na OLT, kumatransceiver jerin. Za mu iya samar da ayyuka na musamman don yanayi daban-daban. Barka da zuwatuntuba.
