FMUSER Single-Frequency Network Complete SFN Network Solution

FM Single-Frequency Network (SFN Network) ke sistimi ea khaso ea dijithale e sebelisang liphatlalatso tse ngata tsa seea-le-moea tse sebetsang hammoho ho hasa molaetsa o le mong ka nako e le 'ngoe ka maqhubu a seea-le-moea a le mong. Sistimi ena e thusa ho ntlafatsa kamohelo ea seea-le-moea ka ho sebelisa li-transmitters tse ngata ho romela lets'oao le le leng ho fapana le le le leng. Lipontšo li amahanngoa le tse ling ho fana ka pontšo e matla, e ka tšeptjoang ho feta qetellong ea moamoheli. Tsamaiso ena e boetse e thusa ho fokotsa ho kena-kenana le liteishene tse ling le ho fana ka tšireletso e ntlafetseng libakeng tseo ho leng thata ho fihla ho tsona.

Tlatsa Tharollo ea Marang-rang a le Mong oa FM (SFN Network) ho tsoa ho FMUSER

Tharollo ea rona e ka hlalosoa e le morero oa "networked", o nang le marang-rang a mararo, e leng:

• FM Single Frequency Network (FM SFN Network)
• Audio Sync Transmission Network
• Remote Monitoring le Management Network.

Litharollo tsena li ka tsamaisoa ka mokhoa o nepahetseng, 'me li ka hokahanya mats'oao a seea-le-moea sa FM ka mokhoa o pharaletseng ka lisebelisoa tse latelang:

1. SFN FM Transmitter
2. Khokahanya Audio Encoder
3. Kopanya Audio Decoder
4. GPS Standard Frequency Jenereithara
5. Digital Standard Frequency Jenereithara
6. Sync Digital Audio Satellite Receiver
7. Antenna ea GPS (GNSS)
8. Taolo ea Telemetry ea data bakeng sa Li-Transmitters tsa FM
9. Sistimi e Felletseng ea Tsamaiso (Software)

FMUSER SFN Network Solutions e Hlalositsoe

Bakeng sa boleng bo holimo ba kaho ea marang-rang ea SFN, mona ke lintlha tsa bohlokoa tseo u lokelang ho li hopola:

• Ho ntlafatsa Matla a Mahlaseli a Matla (EPR) a li-transmitters tsa SFN tsa seteishene se seng le se seng sa motheo, kamehla u li boloke tlas'a 20% ho ERP ea mochine o moholo oa SFN.
• Ho boloka botsitso ba phapang ea tieho bakeng sa mocha oa phetiso ea molumo.
• Ho boloka botsitso le ho nepahala ho phahameng bakeng sa GPS.
• Ho amohela transmitter ea boleng bo holimo ea FSN

Litharollo tse 4 tsa mantlha ho tsoa ho FMUSER ke tsena:

Ka ho Fetisisa Ka ho Fetisisa: Satellite-based FM SFN Network Solution

Tharollo ena e molemohali bakeng sa khaso ea boemo ba kontinente kapa ea setereke. Leha ho le joalo, ho qala ka tharollo ena, ho hlokahala sesebelisoa sa satellite bakeng sa seteishene sa khaso, kapa mats'oao a molumo a kanna a se fetisetsoe libakeng tsa phetisetso tsa sync ea mutiple.

Khetho ea Mohlōli: Tharollo ea Marang-rang ea FM SFN Network

Tharollo ena e molemohali bakeng sa khaso ea boemo ba sebaka kapa ea toropo. E sebetsa ka ho fetisa matshwao a mamelwang a sync-encoded ho cable TV front end ka thuso ea hybrid fiber-coaxial (HFC) netweke e hahiloeng ke mmuso oa lehae, ebe e fetisoa ke sync-decoder ea basebelisi ba ho qetela, matšoao a molumo. qetellong e tla fetisetsoa ho li-transmitters tse ngata liteisheneng tsa motheo tsa sync. Ka ho sebelisa marang-rang a teng a HFC bakeng sa mohaho oa marang-rang oa SFN, baphatlalatsi ba khona ho boloka matsete a bona haholo.

Khetho ea Win-Win: Fiber-based FM SFN Network Solution

Tharollo ena e tumme ka Synchronous Digital Hierarchy (SDH), 'me e molemo ka ho fetisisa bakeng sa ts'ebetso ea theko. Ka melemo ea bandwidth ea phetisetso e pharalletseng, molumo o phahameng oa phetisetso, sebaka se selelele sa phetisetso, 'me ha ho na bothata ba ho sitisoa ke motlakase, tharollo e thehiloeng ho fiber e lumella liteishene tsa seea-le-moea hore li fetise matšoao a molumo ho li-transmitters tse ngata liteisheneng tsa sync tsa motheo ka marang-rang a teng a SDH. .

Khetho ea khale: Tharollo ea Marang-rang ea FM SFN e thehiloeng ho Microwave

Libakeng tse fapaneng lefatšeng ka bophara, ho na le maemo a fapaneng a tlhaho le maemo a sechaba (joalo ka moruo, sekhahla sa baahi, joalo-joalo) a ka fokotsang boleng ba khaso, 'me ke ka lebaka leo microwave e leng bohlokoa, ka ho sebelisa phetiso ea microwave, ha ho hlokahale. mehala e eketsehileng, fiber-optics, kapa lisathelaete. Ho fetisoa ha microwave ho nkoa e le tharollo e bonolo haholoanyane, e theko e tlaase, le e loketseng, Ka hona, ha e bapisoa le tharollo e meraro ea pele , tharollo ea marang-rang ea SFN e thehiloeng ho microwave e bonolo ka ho fetisisa, le tšebeliso ea li-microwave ho theha Digital Synchronous Network (SDH). ) e ipakile e phetha karolo ea bohlokoa khasong e kholo ea libaka.

Melemo le likotsi tsa FM Single-Frequency Network (SFN Network) ke life?

Melemo ea FM SFN Network (marang-rang a le mong) ke:

• Phatlalatso e ntlafetseng: Marang-rang a SFN a fana ka tšireletso e ntlafetseng ka lebaka la matšoao a phatlalatsoang ho tloha libakeng tse ngata, ho fana ka pontšo e matla ho feta marang-rang a tloaelehileng a maqhubu a le mong.
• Ho boloka litšenyehelo: Marang-rang a SFN hangata a theko e tlase ho e kenya le ho e boloka ho feta mefuta e meng ea marang-rang.
• Tlhokomelo e bonolo: Marang-rang a SFN a bonolo ho a boloka ka lebaka la taolo e bohareng ea marang-rang.

go tlhoka mesola ea FM SFN Network (marang-rang a le mong) ke:

• Tšitiso: Marang-rang a SFN a ka ba le tšekamelo ea ho kena-kenana le lipontšo le mekhoa e meng, e leng se bakang boleng bo bobe ba matšoao le ho fokotsa tšireletso.
• Tlhophiso e rarahaneng: Marang-rang a SFN a hloka boemo bo bongata ba tsebo le tsebo ea theknoloji ho theha le ho boloka, ho etsa hore ho be thata ho kenya le ho lokisa.
• Lethathamo le lekanyelitsoeng: Marang-rang a SFN a na le moeli ka mefuta ea ona ka lebaka la ho itšetleha ka li-transmitters tse ngata.

Lisebelisoa tsa FM Single-Frequency Network (SFN Network) ke life?

FM Single-Frequency Network (SFN Network) ke meralo ea marang-rang ea phatlalatso e sebelisang maqhubu a le mong ho fetisa matšoao a mangata sebakeng se le seng. Mofuta ona oa marang-rang o na le lits'ebetso ho phatlalatso ea seea-le-moea le thelevishene, likhokahano tsa mehala, lits'ebeletso tsa polokeho ea sechaba, le tse ling. Li-Network tsa SFN li tšepahala haholo, li fana ka litaba tsa boleng bo holimo tsa molumo le video, 'me li na le litšenyehelo tse ngata ho feta mekhoa e meng ea khaso. Ho feta moo, li fana ka tšireletso e pharalletseng ka li-transmitter tse fokolang, ha li ntse li fana ka melemo e kang ho ntlafatsa ts'ireletso ea tšitiso le ho fokotsa tšebeliso ea matla.

Hobaneng ha FM Single-Frequency Network (SFN Network) e le bohlokoa?

FM Single-Frequency Network (SFN Network) e bohlokoa hobane e fana ka mokhoa o theko e boima oa ho koahela libaka tse kholo ka pontšo e le 'ngoe. E boetse e ntlafatsa boleng ba khaso ea liphatlalatso tsa seea-le-moea sa FM, e netefatsa boiphihlelo ba ho mamela bo sa fetoheng. Ho phaella moo, SFN Networks e thusa ho fokotsa tšitiso pakeng tsa matšoao a mangata a holimo, a lebisang ho boleng bo phahameng ba molumo le ho fokotseha ho fokolang.

U ka etsa joang mohato ka mohato ho theha Marang-rang a Marang-rang a le Mong (SFN Network) bakeng sa khaso ea seea-le-moea sa FM?

1. Etsa qeto ea sebopeho sa marang-rang a SFN - sena se kenyelletsa palo ea li-transmitters, libaka tsa bona, le mekhoa ea bona ea phetisetso.
2. Fumana lilaesense tse hlokahalang bakeng sa li-transmitters 'me u hlophise transmitter e' ngoe le e 'ngoe ka liparamente tse nepahetseng.
3. Kenya li-transmitters libakeng tse nepahetseng 'me u netefatse hore li-antenna li hlophisitsoe hantle.
4. Hokela li-transmitter ho transmitter e bohareng ho theha marang-rang a li-transmitter.
5. Amahanya li-transmitters ho netefatsa hore li hasa molaetsa o tšoanang ka nako e le 'ngoe.
6. Lekola marang-rang a SFN ho netefatsa hore e sebetsa hantle.
7. Lekola marang-rang a SFN ho etsa bonnete ba hore e sebetsa hantle.
8. Etsa liphetoho ho marang-rang ha ho hlokahala ho ntlafatsa ts'ebetso ea eona.

Ke lisebelisoa life tse nang le Network Single-Frequency Network (SFN Network) e felletseng?

Khokahano e felletseng ea FM Single-Frequency Network (SFN Network) e na le transmitter, baamoheli, le molaoli oa marang-rang. Transmitter e romela lets'oao ka lebelo le le leng, le amoheloang ke bohle ba amohelang. Mookameli oa marang-rang o hokahanya ba amohelang, e le hore kaofela ha bona ba fumane pontšo e tšoanang ka nako e le 'ngoe. Sena se tiisa hore molumo o utloahala ka nako e le 'ngoe, ho e-na le hore o liehe kapa o se ke oa lumellana. SFN Network e boetse e lumella ho fana ka tšireletso e ntle ea lipontšo, kaha letšoao le khona ho fihla sebakeng se seholo ho feta ka maqhubu a mangata.

Mokhoa oa ho khetha Marang-rang a Marang-rang a Molemo ka ho Fetisisa a FM (SFN Network)?

Ha u khetha e ntle ka ho fetisisa ea FM Single-Frequency Network (SFN Network) bakeng sa khaso ea seea-le-moea sa FM, ho bohlokoa ho nahana ka litlhoko tse ikhethileng tsa seboholi, joalo ka sebaka sa tikoloho se lokelang ho koaheloa, matla a lets'oao a lakatsehang, tekanyetso e teng, le litlhoko tsa tekheniki tsa marang-rang. Ho feta moo, ke habohlokoa ho etsa lipatlisiso ka phihlelo ea bareki ba nakong e fetileng ho etsa bonnete ba hore SFN Network e khethiloeng e finyella litebello tsa seboholi. Qetellong, ke habohlokoa ho buisana le setsebi se nang le phihlelo bakeng sa keletso mabapi le SFN Network e ntle ka ho fetisisa bakeng sa litlhoko tse khethehileng tsa setsi sa khaso.

Joang ho boloka ka nepo FM Single-Frequency Network (SFN Network)?

Joaloka moenjiniere, u lokela ho etsa bonnete ba hore FM Single-Frequency Network (SFN Network) e lula e behiloe leihlo le ho hlokomeloa ho latela litaelo tsa moetsi. Sena se kenyelletsa ho lekola tekano ea antenna khafetsa, ho netefatsa maemo a matla a transmitter, le ho netefatsa hore likarolo tsohle li sebetsa hantle. Ho phaella moo, o lokela ho etsa bonnete ba hore marang-rang a lula a behiloe leihlo bakeng sa tšitiso e ka 'nang ea e-ba teng,' me u nke mehato ea ho fokotsa tšitiso leha e le efe e fumanoang. Qetellong, o lokela ho etsa bonnete ba hore liphetoho leha e le life tse entsoeng ho SFN Network li ngotsoe 'me li arolelanoa le baenjiniere ba bang ba ka' nang ba ikarabella bakeng sa tlhokomelo ea eona.

Joang ho lokisa FM Single-Frequency Network (SFN Network) haeba e hloleha ho sebetsa?

Haeba FM SFN Network e hloleha ho sebetsa, mohato oa pele ke ho hlahloba likhokahano tsohle tsa marang-rang ho netefatsa hore lithapo tsohle li hoketsoe hantle. Haeba likhokahano li le ntle, mohato o latelang ke ho hlahloba likarolo tsa hardware tsa marang-rang, tse kang antenna, phepelo ea motlakase le li-amplifiers, ho netefatsa hore li sebetsa hantle. Haeba lisebelisoa tsa hardware li sebetsa hantle, mohato o latelang ke ho hlahloba likarolo tsa software tsa marang-rang, tse kang encoder le modulator, ho netefatsa hore li hlophisitsoe hantle. Haeba likarolo tsa software li sa hlophisoa hantle, ke habohlokoa ho latela litaelo tsa moetsi ho tsosolosa litlhophiso. Ho itšetlehile ka bothata, ho ka 'na ha hlokahala hore u ntlafatse firmware kapa software ho ea phetolelong ea morao-rao. Hang ha likhokahano tsohle le likarolo li hlahlojoa 'me li sebetsa hantle, mohato oa ho qetela ke ho hlahloba marang-rang ho netefatsa hore e sebetsa kamoo ho lebeletsoeng kateng.

Mokhoa oa ho khetha Seteishene sa Base bakeng sa marang-rang a SFN?

• Ho nahanoa ka Sephethephethe: Etsa bonnete ba hore liteishene tse khethiloeng li ka koahela litsela tse kholo tse haufi tsa boemo bo holimo.
• Ho nahanoa ka Tekano ea Baahi: Ela hloko likhetho tse lumellang ho akaretsoa ha libaka tse nang le baahi ba bangata joalo ka litoropo kapa litoropo.
• Ho nahanoa ka litlatsetso: Eketsa libaka tsa tšireletso metseng e meholo e nang le meaho e melelele e pota-potiloeng.
• Nahana ka bophahamo ba Antenna: Boloka sebaka se pakeng tsa liteishene tsa motheo ka har'a lik'hilomithara tse 31 haeba bophahamo ba antenna ea seteishene bo behiloe sebakeng se tlaase; Boloka sebaka se pakeng tsa liteishene tsa motheo ka har'a limaele tse 62 haeba bophahamo ba lenaka la seteishene bo behiloe sebakeng se phahameng.

Mokhoa oa ho theha Network e Felletseng ea SFN?

1. Ho rera lipatlisiso tsa sebaka le ho itokisetsa tharollo
2. Ho khetha lisebelisoa tse loketseng le bongata
3. Ho beha sebaka se ts'oanang se bohareng (AKA: sebaka sa tšireletso e fetang) ea setsi sa setsi ka ho hlahloba matla a tšimo.

Ntle le moo, tokiso ea ho lieha ha nako ea tekano ho boemo bo botle ka ho fetesisa bo bohareng ba sebaka se momahaneng e tla fihlela litlhoko tse latelang:

• HA HO na molumo o otlang oa maqhubu a tšoanang sebakeng se momahaneng (ho beha leihlo ha ho se na lets'oao la molumo)
• HA HO na phapang e hlakileng ea molumo oa molumo o bakoang ke lerata sebakeng se momahaneng (lentsoe le hlakileng le 'mino o monate)
• HA HO na phapang e hlakileng ea phapano sebakeng sa momahano (lerata le fokolang la bokamorao)
• Tlhahlobo e ikemetseng ea phello ea khokahano ea sistimi e fihla ho feta lintlha tsa 4 (ntle le sebaka se nang le moriti)

Litlhoko tsa tekheniki tsa FM SFN Network ke life?

E le hore u phatlalatse ka mokhoa o sa tsitsang le SFN Network, litaba tsa litšitiso sebakeng se kopanetsoeng li lokela ho rarolloa hang-hang, 'me mona ke lintlha tsa bohlokoa tsa 4 tse lokelang ho nkoa ka hloko, e leng:

Tiisetso ea Matla a Lekaneng a Tšimo

Ho hlokahala hore ho be le matla a lekaneng a tšireletso libakeng tsohle tsa tšebeletso ea phetisetso tsamaisong.

Co-Frequency

Sistimi ea khaso e lumellanang ea FM, phapang e lekanyelitsoeng lipakeng tsa mokhanni le maqhubu a sefofane pakeng tsa li-transmitters tse peli tse haufi e ka tlase ho 1 × 10-9, botsitso ba mohloli oa maqhubu a litšupiso tsa seteishene ka seng ≤5 × 10-9 / 24 lihora.

Mokhahlelong

Sistimi ea khaso e lumellanang ea FM, sebakeng se le seng sa litšupiso sebakeng sa momahano, phapang ea nako e pakeng tsa matšoao a fetotsoeng a fetisoang ke li-transmitters tse peli tse haufi:

• Khaso ea Mono ≤ 10μS
• khaso ea stereo ≤ 5μS.

Sistimi ea khaso e lumellanang ea FM, botsitso ba ho lieha ha sekhahla sa lets'oao le fetotsoeng la phetisetso ka 'ngoe:

• Ho feta ±1μS (1KHZ, ho kheloha ho hoholo ha maqhubu: ± 75KHZ, lihora tse 24).

Co-Modulation

• Sistimi ea khaso e lumellanang ea FM, phoso ea degree ea modulation ea li-transmitters tse peli tse haufi ke ≤3%
• Lenaneong la khaso la li-synchronous FM, mochine o mong le o mong o hlokeha ho tsitsisa modulation ≤2.5% (1KHZ, ho kheloha ho hoholo ha maqhubu: ± 75KHZ, lihora tsa 24).