I-FMUSER I-Single-Frequency Network Complete SFN Network Solution

I-FM Single-Frequency Network (i-SFN Network) iwuhlelo lokusakaza ngedijithali olusebenzisa izidluliseli zomsakazo eziningi ezisebenza ndawonye ukuze zisakaze isignali efanayo ngesikhathi esisodwa kumaza omsakazo owodwa. Lolu hlelo lusiza ukuthuthukisa ukwamukela komsakazo ngokusebenzisa izidluliseli eziningi ukuthumela isignali efanayo esikhundleni seyodwa nje. Amasignali avumelaniswa namanye ukuze anikeze isignali eqinile, ethembeke kakhulu ekugcineni komamukeli. Lolu hlelo lusiza futhi ekwehliseni ukugxambukela kwezinye iziteshi futhi lunikeze ukusabalala okungcono ezindaweni okunzima ukufinyelela kuzo.

Gcwalisa Isixazululo Senethiwekhi Ye-FM Single-Frequency (inethiwekhi ye-SFN) evela ku-FMUSER

Isixazululo sethu singachazwa ngokuthi iphrojekthi "enenethiwekhi", equkethe amanethiwekhi amathathu, okungukuthi:

• I-FM Single Frequency Network (FM SFN Network)
• Inethiwekhi Yokudlulisa Ukuvumelanisa Umsindo
• Inethiwekhi Yokuqapha Nokuphatha Ekude.

Lezi zixazululo zingase zisetshenziswe ngendlela ephumelelayo, futhi zingavumelanisa ngaphandle komthungo amasignali omsakazo we-FM ekumbozweni okubanzi ngemishini elandelayo:

1. I-SFN FM Transmitter
2. Vumelanisa Isifaki khodi Somsindo
3. Vumelanisa Isiqophi Somsindo
4. I-GPS Standard Frequency Generator
5. I-Digital Standard Frequency Generator
6. Vumelanisa Isamukeli Sesathelayithi Yomsindo Yedijithali
7. I-antenna ye-GPS (GNSS)
8. I-Data Telemetry Controller yama-FM Transmitters
9. Qedela Uhlelo Lokuphatha (Isofthiwe)

I-FMUSER SFN Network Solutions Ichaziwe

Ukuze uthole ikhwalithi engcono kakhulu yokwakhiwa kwenethiwekhi ye-SFN, nanka amaphuzu abalulekile okufanele uwakhumbule:

• Ukulungiselela Amandla Asebenzayo Asetshenziswayo (EPR) wama-SFN adlulisa isiteshi ngasinye, hlala uwagcina ngaphansi kuka-20% ukuya ku-ERP yesidluliseli esikhulu se-SFN.
• Ukugcina ukuqina komehluko wokulibaziseka wesiteshi sokudlulisa umsindo.
• Ukugcina ukuzinza nokunemba okuphezulu kwe-GPS.
• Ukwamukela isidlulisi sekhwalithi ephezulu se-FSN

Nazi izixazululo ezi-4 eziyinhloko ezivela ku-FMUSER:

Ochwepheshe Kakhulu: Isathelayithi-based FM SFN Network Solution

Lesi sixazululo singcono kakhulu ekusakazeni ezingeni lezwekazi noma esifundeni. Kodwa-ke, ukuqalisa ngalesi sixazululo, isidluliseli sesathelayithi siyadingeka esiteshini sokusakaza, noma amasiginali omsindo angase angadluliswa kumasayithi okuthumela ukuvumelanisa kwe-mutiple.

Ukukhetha Kowinile: Isixazululo Senethiwekhi ye-FM SFN esekwe kukhebula

Lesi sixazululo singcono kakhulu ekusakazeni ezingeni lesifunda noma ledolobha. Isebenza ngokudlulisa amasiginali alalelwayo avunyelaniswe ngekhodi ku-cable TV front end ngosizo lwenethiwekhi ye-hybrid fiber-coaxial (HFC) eyakhiwe uhulumeni wendawo, bese idluliselwa yi-sync-decoder yabasebenzisi bokugcina, amasignali omsindo. ekugcineni izodluliselwa kuma-transmitters amaningi eziteshini eziyisisekelo zokuvumelanisa. Ngokusebenzisa inethiwekhi ekhona ye-HFC yokwakha inethiwekhi ye-SFN, abasakazi bayakwazi ukonga kakhulu ukutshalwa kwezimali kwabo.

Win-Win Choice: Fiber-based FM SFN Network Solution

Lesi sixazululo sidume nge-Synchronous Digital Hierarchy (SDH), futhi sihamba phambili ekusebenzeni kwentengo. Ngezinzuzo zomkhawulokudonsa obanzi wokudlulisa, ivolumu ephezulu yokudlulisela, ibanga elide lokudlulisela, futhi akulula neze ukuphazanyiswa yi-electromagnetic, isisombululo esisekelwe ku-fiber sivumela iziteshi zomsakazo ukudlulisa amasignali omsindo kuma-transmitters amaningi eziteshini eziyisisekelo zokuvumelanisa ngenethiwekhi ekhona ye-SDH. .

Inketho Yakudala: Isixazululo senethiwekhi ye-FM ye-FM esekelwe ku-Microwave

Ezifundeni ezihlukene emhlabeni jikelele, kunezimo zemvelo ezihlukene kakhulu kanye nezici zenhlalo (ezifana nomnotho, ukuminyana kwabantu, njll.) ezingase zehlise izinga lokusakaza, yingakho i-microwave ibalulekile, ngokusebenzisa ukudluliswa kwe-microwave, asikho isidingo izintambo ezengeziwe, i-fiber-optics, noma amasathelayithi. Ukuhanjiswa kwe-Microwave kubonakala njengesixazululo esiguquguqukayo, esiphansi, nesisombululo esikahle, Ngakho-ke, uma kuqhathaniswa nezixazululo ezintathu zokuqala, isisombululo senethiwekhi ye-SFN esisekelwe ku-microwave siguquguquka kakhulu, kanye nokusetshenziswa kwama-microwaves ukwakha i-Digital Synchronous Network (SDH) ) kufakazelwe ukuthi uneqhaza elikhulu ekusakazeni ezindaweni eziningi.

Yiziphi izinzuzo kanye nobubi be-FM Single-Frequency Network (SFN Network)?

Izinzuzo ze-FM SFN Network (inethiwekhi yefrikhwensi eyodwa) yilezi:

• Ukufakwa okuthuthukisiwe: Amanethiwekhi e-SFN ahlinzeka ngokufakwa okuthuthukisiwe ngenxa yamasiginali asakazwa ezindaweni eziningi, ahlinzeka ngesignali enamandla kunenethiwekhi evamile yefrikhwensi eyodwa.
• Ukonga izindleko: Amanethiwekhi e-SFN ngokuvamile abiza kancane ukuwafaka nokuyinakekela kunezinye izinhlobo zamanethiwekhi.
• Ukugcinwa okulula: Amanethiwekhi e-SFN kulula ukuwagcina ngenxa yokulawula okumaphakathi kwenethiwekhi.

Okumbi ye-FM SFN Network (inethiwekhi yefrikhwensi eyodwa) yile:

• Ukuphazamisa: Amanethiwekhi e-SFN angase athambekele ekuphazamisekeni kwamanye amasignali nezinhlelo, okuholela kukhwalithi yesignali empofu kanye nokunciphisa ukumbozwa.
• Ukusethwa okuyinkimbinkimbi: Amanethiwekhi e-SFN adinga izinga elikhulu lobuchwepheshe nolwazi lobuchwepheshe ukuze asethe futhi agcinwe, okwenza kube nzima kakhulu ukuwafaka nokuwalungiselela.
• Ibanga elilinganiselwe: Amanethiwekhi e-SFN akhawulelwe ebangeni lawo ngenxa yokuthembela kuma-transmitters amaningi.

Yiziphi izinhlelo zokusebenza ze-FM Single-Frequency Network (SFN Network)?

I-FM Single-Frequency Network (i-SFN Network) iyisakhiwo senethiwekhi yokusakaza esebenzisa ifrikhwensi eyodwa ukudlulisa amasignali amaningi okuthumela endaweni efanayo. Lolu hlobo lwenethiwekhi lunezinhlelo zokusebenza ekusakazweni komsakazo nomabonakude, ezokuxhumana ngeselula, izinsiza zokuphepha zomphakathi, nokunye. Amanethiwekhi e-SFN anokwethenjelwa kakhulu, ahlinzeka ngekhwalithi ephezulu yomsindo nevidiyo, futhi abiza kakhulu kunezinye izindlela zokusakaza. Ukwengeza, anika amandla ukumbozwa okubanzi ngama-transmitter ambalwa, kuyilapho futhi ehlinzeka ngezinzuzo ezifana nokuvikeleka kokuphazanyiswa okuthuthukisiwe kanye nokunciphisa ukusetshenziswa kwamandla.

Kungani i-FM Single-Frequency Network (SFN Network) ibalulekile?

I-FM Single-Frequency Network (i-SFN Network) ibalulekile ngoba inikeza indlela engabizi kakhulu yokumboza izindawo ezinkulu ngesignali eyodwa. Iphinde ithuthukise ikhwalithi yokusakazwa komsakazo we-FM, iqinisekise umuzwa wokulalela ongaguquki. Ukwengeza, Amanethiwekhi e-SFN asiza ukunciphisa ukuphazamiseka phakathi kwamasignali amaningi agqagqene, okuholela kukhwalithi ephezulu yomsindo kanye nokuphazamiseka okumbalwa.

Ungayakha kanjani isinyathelo ngesinyathelo inethiwekhi ephelele ye-FM Single-Frequency (i-SFN Network) yokusakaza komsakazo we-FM?

1. Nquma ngesakhiwo senethiwekhi ye-SFN - lokhu kuhlanganisa inombolo yabathumeli, izindawo zabo, nemingcele yabo yokudlulisela.
2. Thola amalayisense adingekayo ezithumeli futhi ulungiselele isidlulisi ngasinye ngemingcele efanele.
3. Faka ama-transmitter ezindaweni ezifanele futhi uqinisekise ukuthi izinti zimiswe ngendlela efanele.
4. Xhuma ama-transmitter kusidlulisi esimaphakathi ukuze wakhe inethiwekhi yabathumeli.
5. Vumelanisa abathumeli ukuqinisekisa ukuthi basakaza isignali efanayo ngesikhathi esisodwa.
6. Hlola inethiwekhi ye-SFN ukuze uqinisekise ukuthi isebenza kahle.
7. Gada inethiwekhi ye-SFN ukuze wenze isiqiniseko sokuthi isebenza kahle.
8. Yenza izinguquko kunethiwekhi njengoba kudingeka ukuze uthuthukise ukusebenza kwayo.

Yiziphi izisetshenziswa ezihlanganisa i-FM Single-Frequency Network (i-SFN Network) ephelele?

Inethiwekhi ephelele ye-FM Single-Frequency Network (SFN Network) iqukethe isidlulisi, abamukeli, nesilawuli senethiwekhi. I-transmitter ithumela isignali ngefrikhwensi eyodwa, etholwa yibo bonke abemukeli. Isilawuli senethiwekhi sibe sesivumelanisa abemukeli, ukuze bonke bathole isignali efanayo ngesikhathi esisodwa. Lokhu kuqinisekisa ukuthi umsindo uzwakala ngesikhathi esisodwa, esikhundleni sokuthi ubambezeleke noma ungavumelaniswa. Inethiwekhi ye-SFN iphinde ivumele ukumbozwa kwesignali okungcono, njengoba isignali ikwazi ukufinyelela endaweni enkulu kunamafrikhwensi amaningi.

Ungayikhetha kanjani inethiwekhi engcono kakhulu ye-FM Single-Frequency (SFN Network)?

Lapho ukhetha i-FM Single-Frequency Network (i-SFN Network) ehamba phambili yokusakaza umsakazo we-FM, kubalulekile ukubheka izidingo ezithile zomsakazi, njengendawo yezwe okufanele ihlanganiswe, amandla esiginali afiswayo, isabelomali esitholakalayo, izidingo zobuchwepheshe zenethiwekhi. Ukwengeza, kubalulekile ukucwaninga ulwazi lwamakhasimende adlule ukuze uqinisekise ukuthi i-SFN Network ekhethiwe ihlangabezana nokulindelwe ngumsakazi. Okokugcina, kubalulekile ukuthintana nochwepheshe onolwazi ukuze uthole iseluleko ngenethiwekhi ye-SFN ehamba phambili ngezidingo ezithile zomsakazi.

Uyigcina kanjani kahle i-FM Single-Frequency Network (SFN Network)?

Njengonjiniyela, kufanele uqinisekise ukuthi i-FM Single-Frequency Network (i-SFN Network) igadwa njalo futhi igcinwa ngokuvumelana neziqondiso zomkhiqizi. Lokhu kuhlanganisa ukuhlola ngokujwayelekile ukuqondana kwe-antenna, ukuqinisekisa amazinga wamandla othumeli, kanye nokuqinisekisa ukuthi zonke izingxenye zisebenza kahle. Ukwengeza, kufanele uqinisekise ukuthi inethiwekhi igadwa njalo ukuze kutholakale ukuphazamiseka okungase kube khona, futhi uthathe izinyathelo zokunciphisa noma yikuphi ukuphazamiseka okutholakele. Okokugcina, kufanele uqinisekise ukuthi noma yiziphi izinguquko ezenziwe ku-SFN Network zibhaliwe futhi zabelwa abanye onjiniyela abangase babe nesibopho sokuyilungisa.

Ilungiswa kanjani i-FM Single-Frequency Network (SFN Network) uma ihluleka ukusebenza?

Uma i-FM SFN Network yehluleka ukusebenza, isinyathelo sokuqala ukuhlola konke ukuxhumana nenethiwekhi ukuze uqiniseke ukuthi zonke izintambo zixhumeke kahle. Uma ukuxhumeka kukuhle, isinyathelo esilandelayo ukuhlola izingxenye zehadiwe yenethiwekhi, njenge-antenna, ukunikezwa kwamandla, nezikhulisi, ukuze uqiniseke ukuthi zisebenza kahle. Uma izingxenye zezingxenyekazi zekhompuyutha zisebenza kahle, isinyathelo esilandelayo ukuhlola izingxenye zesofthiwe yenethiwekhi, njengesishumeki sekhodi nemoduli, ukuze uqiniseke ukuthi zimiswe ngendlela efanele. Uma izingxenye zesofthiwe zingalungiswanga kahle, kubalulekile ukulandela imiyalelo yomkhiqizi ukuze usethe kabusha izilungiselelo. Kuye ngenkinga, kungase kudingeke ukuthi ubuyekeze i-firmware noma isofthiwe ibe yinguqulo yakamuva. Uma zonke izixhumi nezingxenye sezihloliwe futhi zisebenza kahle, isinyathelo sokugcina ukuhlola inethiwekhi ukuze uqiniseke ukuthi isebenza njengoba kulindelekile.

Ungasikhetha Kanjani Isiteshi Esiyisisekelo senethiwekhi ye-SFN?

• Icabangela ithrafikhi: Qiniseka ukuthi iziteshi ezikhethiwe zingamboza ngempumelelo imigwaqo ewuthelawayeka yezinga eliphezulu ezungezile.
• Kucatshangelwa Ukuminyana Kwabantu: Naka izinketho ezivumela ukumbozwa kwezindawo ezinabantu abaningi njengamadolobha noma amadolobhana.
• Icabangela Izengezo: Hlanganisa izindawo ezingeziwe emadolobheni amakhulu anamabhilidi amade azungezwe.
• Ukucabangela Ukuphakama Kwe-Antenna: Gcina ibanga phakathi kweziteshi eziyisisekelo ngaphakathi kwamamayela angu-31 uma ukuphakama kwe-antenna yesiteshi kumiswe endaweni ephansi; Gcina ibanga phakathi kweziteshi eziyisisekelo libe ngamamayela angu-62 uma ukuphakama kwe-antenna yesiteshi kumiswe endaweni ephezulu.

Indlela Yokusetha Inethiwekhi Ye-SFN Ephelele?

1. Ukuhlela inhlolovo yendawo futhi ulungiselele izixazululo
2. Ukukhetha amathuluzi afanele kanye nenani
3. Ukubeka indawo ehlangene emaphakathi (AKA: indawo yokumboza okweqayo) yesiteshi esiyisisekelo ngokuhlola amandla enkambu.

Ngaphezu kwalokho, ukulungiswa kokulibaziseka kwesikhathi sokulinganisa kuya kusimo sokuvumelanisa esingcono kakhulu maphakathi nendawo ehambisanayo kuzohlangabezana nezimfuneko ezilandelayo:

• AKUKHO umsindo oshayayo wemvamisa efanayo endaweni ehambisanayo (ukuqapha uma ingekho isignali yomsindo)
• AWUKHO umehluko osobala wokuguquguquka ovela umsindo endaweni ehambisanayo (izwi elicacile nomculo omnandi)
• AKUKHO ukuhlanekezela komehluko wesigaba endaweni yokuhlangana (umsindo omncane ongemuva)
• Ukuhlolwa okuzimele komphumela wokuvumelanisa uhlelo kufinyelela ngaphezu kwamaphoyinti angu-4 (ngaphandle kwendawo enomthunzi)

Yiziphi izidingo zobuchwepheshe ze-FM SFN Network?

Ukuze usakaze ngaphandle komthungo ngeNethiwekhi ye-SFN, izinkinga zokuphazamiseka endaweni ehambisanayo kufanele zixazululwe unomphela, futhi nazi izici ezingu-4 ezibalulekile okudingeka zicatshangelwe ngokucophelela, okuyizi:

Isiqinisekiso Amandla Enkundla Anele

Kudingeka ukuthi kube namandla anele enkundla yokuhlanganisa kuzo zonke izindawo zesevisi yokudlulisa ohlelweni.

I-Co-Frequency

Ohlelweni lokusakaza oluhambisanayo lwe-FM, umehluko wemvamisa ohlobene phakathi komthwali kanye nemvamisa yomshayeli phakathi kwanoma yimaphi ama-transmitters amabili aseduze angaphansi kuka-1 × 10-9, ukuzinza komthombo wokuvama kwereferensi wesiteshi ngasinye ≤5×10-9/24 amahora.

Ngesigaba

Kuhlelo lokusakaza oluvumelanayo lwe-FM, endaweni eyireferensi efanayo endaweni yokuhlangana, umehluko wesikhathi ohlobene phakathi kwamasignali ashintshiwe adluliswa yinoma yimaphi ama-transmitters amabili aseduze:

• Ukusakaza kwe-Mono ≤ 10μS
• ukusakaza kwe-stereo ≤ 5μS.

Kuhlelo lokusakaza oluhambisanayo lwe-FM, ukuzinza kwesigaba sokubambezeleka kwesiginali eshintshiwe yesidlulisi ngasinye:

• Kungcono kuno-±1μS (1KHZ, ukuchezuka kwefrikhwensi enkulu: ±75KHZ, amahora angama-24).

I-Co-Modulation

• Ohlelweni lokusakaza oluhambisanayo lwe-FM, iphutha ledigri yokushintshashintsha kwanoma yimaphi ama-transmitters amabili aseduze ngu-≤3%
• Ohlelweni lokusakaza oluhambisanayo lwe-FM, isidlulisi ngasinye siyadingeka ukuze kuqiniswe i-modulation ≤2.5% (1KHZ, ukuchezuka okukhulu kwamafrikhwensi: ±75KHZ, amahora angama-24).