FMUSER Ib-Frequency Network Ua tiav SFN Network Solution

FM Single-Frequency Network (SFN Network) yog ib qho kev tshaj tawm digital uas siv ntau lub xov tooj cua sib txuas ua haujlwm ua ke los tshaj tawm tib lub teeb liab ib txhij ntawm ib lub xov tooj cua zaus. Qhov system no pab txhim kho kev txais xov tooj cua los ntawm kev siv ntau lub transmitters xa tib lub teeb liab tsis yog ib qho xwb. Cov teeb liab yog synchronized nrog ib leeg los muab cov teeb liab muaj zog, txhim khu kev qha ntau dua ntawm tus txais qhov kawg. Cov kab ke no tseem pab txo qis kev cuam tshuam los ntawm lwm qhov chaw nres tsheb thiab muab kev pabcuam zoo dua hauv cov cheeb tsam nyuaj.

Ua kom tiav FM Single-Frequency Network (SFN Network) daws los ntawm FMUSER

Peb qhov kev daws teeb meem tuaj yeem txhais tau tias yog "kev sib koom tes", uas muaj peb lub network, uas yog:

• FM Tib Zaus Network (FM SFN Network)
• Suab Sync Transmission Network
• Chaw Taws Teeb Saib Xyuas thiab Tswj Network.

Cov kev daws teeb meem no tuaj yeem siv tau yooj yim hauv kev ua haujlwm tau zoo, thiab tuaj yeem sib txuas ua ke ntawm FM xov tooj cua teeb liab hauv kev pabcuam dav dav nrog cov cuab yeej hauv qab no:

1. SFN FM xov tooj cua
2. Sync Audio Encoder
3. Sync Audio Decoder
4. GPS Standard Zaus Generator
5. Digital Standard Zaus Generator
6. Sync Digital Audio Satellite Receiver
7. GPS kav hlau txais xov (GNSS)
8. Data Telemetry Controller rau FM Transmitters
9. Ua kom tiav Management System (Software)

FMUSER SFN Network Solutions piav qhia

Txhawm rau kom qhov zoo tshaj plaws ntawm SFN network tsim, ntawm no yog qee cov ntsiab lus tseem ceeb koj yuav tsum nco ntsoov:

• Optimizing Qhov Zoo Radiated Fais Fab (EPR) ntawm SFN transmitters ntawm txhua lub hauv paus chaw nres tsheb, ib txwm khaws nws qis dua 20% rau ERP ntawm lub ntsiab SFN transmitter.
• Ua kom ruaj ntseg ntawm qhov sib txawv ncua sij hawm rau lub suab kis tau tus mob channel.
• Kev ruaj ntseg thiab siab precision rau GPS.
• Txais yuav zoo FSN transmitter

Nov yog 4 lub ntsiab kev daws teeb meem los ntawm FMUSER:

Kev tshaj lij tshaj plaws: Satellite-based FM SFN Network Solution

Qhov kev daws teeb meem no yog qhov zoo tshaj plaws rau kev tshaj tawm hauv av loj lossis hauv nroog. Txawm li cas los xij, txhawm rau pib nrog qhov kev daws teeb meem no, xav tau lub xov tooj cua xa xov tooj cua rau qhov chaw tshaj tawm, lossis lub suab teeb liab yuav tsis raug xa mus rau ntau qhov chaw sib txuas.

Kev Xaiv Yeej: Cable-based FM SFN Network Solution

Qhov kev daws teeb meem no yog qhov zoo tshaj plaws rau kev tshaj tawm hauv cheeb tsam lossis hauv nroog. Nws ua haujlwm los ntawm kev xa cov cim suab uas yog sync-encoded rau cable TV pem hauv ntej kawg nrog kev pab ntawm hybrid fiber-coaxial (HFC) network tsim los ntawm tsoomfwv hauv nroog, tom qab ntawd raug xa mus los ntawm synchronization-decoder ntawm cov neeg siv kawg, lub suab teeb liab Thaum kawg yuav kis tau mus rau ntau lub transmitters ntawm cov chaw nres tsheb sync. Los ntawm kev siv HFC network uas twb muaj lawm rau SFN network tsim, cov tshaj tawm muaj peev xwm txuag tau lawv cov peev txheej.

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

Qhov kev daws teeb meem no muaj npe nrov rau Synchronous Digital Hierarchy (SDH), thiab yog qhov zoo tshaj plaws rau kev ua haujlwm ntawm tus nqi. Nrog rau qhov zoo ntawm kev sib kis bandwidth, siab ntim ntim, kev sib kis ntev, thiab tsis tshua muaj kev cuam tshuam los ntawm electromagnetic cuam tshuam, cov kev daws teeb meem fiber ntau tso cai rau cov xov tooj cua xa xov tooj cua mus rau ntau lub transmitters ntawm lub hauv paus chaw nres tsheb ntawm SDH network. .

Classic Xaiv: Microwave-based FM SFN Network Solution

Hauv cov cheeb tsam sib txawv thoob ntiaj teb, muaj ntau qhov sib txawv ntawm ntuj tsim thiab kev sib raug zoo (xws li kev lag luam, cov pej xeem ceev, thiab lwm yam) uas tuaj yeem txo qhov kev tshaj tawm xov xwm, thiab qhov no yog vim li cas microwave tseem ceeb, los ntawm kev siv microwave kis tau tus mob, tsis xav tau. ntxiv cables, fiber-optics, los yog satellites. Microwave kis tau tus mob yog pom tau tias yog ib tug ntau saj zawg zog, uas tsis muaj nqi, thiab yooj yim tov, Yog li ntawd, piv nrog rau thawj peb txoj kev daws teeb meem, lub microwave-based SFN network tov yog qhov yooj yim tshaj plaws, thiab kev siv microwaves los tsim ib Digital Synchronous Network (SDH). ) tau raug pov thawj los ua lub luag haujlwm tseem ceeb hauv kev tshaj tawm hauv cheeb tsam loj.

Dab tsi yog qhov zoo thiab qhov tsis zoo ntawm FM Single-Frequency Network (SFN Network)?

Qhov zoo ntawm FM SFN Network (ib zaus network) yog:

• Txhim kho qhov kev pab cuam: SFN tes hauj lwm muab kev pab zoo dua vim tias cov teeb liab tau tshaj tawm los ntawm ntau qhov chaw, muab lub teeb liab muaj zog dua li ib lub network ib zaus.
• Kev txuag nqi: SFN tes hauj lwm feem ntau tsis tshua kim rau nruab thiab tswj dua lwm hom kev tes hauj lwm.
• Kev saib xyuas yooj yim: SFN tes hauj lwm yooj yim rau kev tswj hwm vim yog lub hauv paus tswj hwm ntawm lub network.

tsis zoo FM SFN Network (ib zaus network) yog:

• Kev cuam tshuam: SFN tes hauj lwm tuaj yeem cuam tshuam los ntawm lwm cov teeb liab thiab cov tshuab, ua rau cov teeb liab tsis zoo thiab txo cov kev pab cuam.
• Kev teeb tsa nyuaj: SFN tes hauj lwm yuav tsum muaj kev txawj ntse thiab kev paub ntau dua los teeb tsa thiab tswj, ua rau lawv nyuaj rau nruab thiab teeb tsa.
• Txwv tsis pub muaj ntau yam: SFN tes hauj lwm raug txwv nyob rau hauv lawv qhov ntau yam vim muaj kev cia siab rau ntau lub transmitters.

Dab tsi yog daim ntawv thov ntawm FM Ib Zaus Network (SFN Network)?

FM Single-Frequency Network (SFN Network) yog ib qho kev tshaj tawm hauv xov tooj cua uas siv ib zaus los xa ntau lub teeb liab xa mus rau tib thaj chaw. Hom network no muaj cov ntawv thov hauv xov tooj cua thiab TV tshaj tawm, kev sib txuas lus hauv xov tooj, kev pabcuam kev nyab xeeb rau pej xeem, thiab lwm yam. SFN Networks muaj kev ntseeg siab heev, muab kev pabcuam zoo dua qub thiab video, thiab muaj txiaj ntsig zoo dua li lwm txoj hauv kev tshaj tawm. Tsis tas li ntawd, lawv pab kom dav dav nrog tsawg dua transmitters, thaum tseem muab cov txiaj ntsig zoo xws li txhim kho kev tiv thaiv kev cuam tshuam thiab txo qis kev siv hluav taws xob.

Vim li cas FM Single-Frequency Network (SFN Network) tseem ceeb?

FM Single-Frequency Network (SFN Network) yog ib qho tseem ceeb vim tias nws muab txoj hauv kev zoo los npog thaj chaw loj nrog ib lub teeb liab. Nws kuj tseem txhim kho qhov kev pab cuam zoo ntawm FM xov tooj cua tshaj tawm, ua kom muaj kev mloog zoo ib yam. Tsis tas li ntawd, SFN Networks pab txo kev cuam tshuam ntawm ntau lub teeb liab sib tshooj, ua rau lub suab zoo dua thiab muaj kev cuam tshuam tsawg dua.

Yuav ua li cas ua ib kauj ruam los ntawm kauj ruam tsim kom tiav FM Ib Zaug Ib Leeg Network (SFN Network) rau FM xov tooj cua tshaj tawm?

1. Txiav txim siab ntawm qhov teeb tsa ntawm SFN network - qhov no suav nrog tus naj npawb ntawm cov xa tawm, lawv qhov chaw, thiab lawv qhov kis tsis tau.
2. Tau txais cov ntawv tso cai tsim nyog rau cov transmitters thiab teeb tsa txhua lub transmitter nrog rau qhov tsis zoo.
3. Nruab cov transmitters nyob rau hauv qhov chaw thiab xyuas kom meej tias cov kav hlau txais xov raug teeb tsa kom raug.
4. Txuas cov transmitters mus rau hauv nruab nrab transmitter los tsim ib lub network ntawm transmitters.
5. Synchronize cov transmitters kom ntseeg tau tias lawv tshaj tawm cov teeb liab tib lub sijhawm.
6. Ntsuam xyuas SFN network kom paub meej tias nws ua haujlwm zoo.
7. Saib xyuas SFN network kom paub tseeb tias nws ua haujlwm zoo.
8. Ua kev hloov kho rau lub network raws li qhov tsim nyog los ua kom nws qhov kev ua tau zoo.

Cov khoom siv dab tsi suav nrog kev ua tiav FM Ib Leeg Ib Zaug Network (SFN Network)?

Ib qho ua tiav FM Ib Zaus Network (SFN Network) muaj lub tshuab xa tawm, cov neeg txais, thiab lub network tswj. Lub transmitter xa tawm ib lub teeb liab ntawm ib zaus, uas tau txais los ntawm tag nrho cov receivers. Lub network tswj ces synchronizes cov receivers, kom tag nrho cov ntawm lawv tau txais tib lub teeb liab nyob rau tib lub sij hawm. Qhov no ua kom lub suab hnov ​​tag nrho ib zaug, tsis txhob ncua sijhawm lossis tawm ntawm sync. Lub SFN Network kuj tso cai rau cov teeb liab zoo dua, vim tias lub teeb liab muaj peev xwm ncav cuag thaj tsam ntau dua nrog ntau zaus.

Yuav ua li cas xaiv qhov zoo tshaj plaws FM Single-Frequency Network (SFN Network)?

Thaum xaiv qhov zoo tshaj plaws FM Single-Frequency Network (SFN Network) rau FM xov tooj cua tshaj tawm, nws yog ib qho tseem ceeb uas yuav tau xav txog cov kev xav tau tshwj xeeb ntawm tus tshaj tawm xov xwm, xws li thaj chaw thaj chaw yuav tsum tau them, qhov xav tau lub teeb liab lub zog, cov peev nyiaj muaj peev xwm, thiab cov kev xav tau. kev cai ntawm lub network. Tsis tas li ntawd, nws yog ib qho tseem ceeb rau kev tshawb fawb txog cov kev paub dhau los ntawm cov neeg siv khoom yav dhau los kom ntseeg tau tias SFN Network tau xaiv ua tau raws li tus tshaj tawm xov xwm kev cia siab. Thaum kawg, nws yog ib qho tseem ceeb uas yuav tau sab laj nrog tus kws tshaj lij rau cov lus qhia ntawm qhov zoo tshaj plaws SFN Network rau tus tshaj tawm cov kev xav tau tshwj xeeb.

Yuav ua li cas kom tswj tau ib qho FM Ib Zaus Network (SFN Network)?

Raws li ib tug engineer, koj yuav tsum xyuas kom meej tias FM Single-Frequency Network (SFN Network) tau saib xyuas thiab tswj xyuas raws li cov chaw tsim khoom cov lus qhia. Qhov no suav nrog niaj hnub tshuaj xyuas cov kav hlau txais xov zoo sib xws, txheeb xyuas cov theem hluav taws xob xa hluav taws xob, thiab xyuas kom meej tias tag nrho cov khoom ua haujlwm zoo. Tsis tas li ntawd, koj yuav tsum xyuas kom meej tias lub network tau saib xyuas tsis tu ncua rau kev cuam tshuam, thiab ua cov kauj ruam los txo cov kev cuam tshuam uas tau pom. Thaum kawg, koj yuav tsum xyuas kom meej tias txhua qhov kev hloov pauv tau ua rau SFN Network tau sau tseg thiab sib koom nrog lwm tus kws tshaj lij uas yuav yog lub luag haujlwm rau nws txoj kev saib xyuas.

Yuav ua li cas kho lub FM Ib Zaus Network (SFN Network) yog tias nws tsis ua haujlwm?

Yog tias FM SFN Network tsis ua haujlwm, thawj kauj ruam yog kuaj xyuas tag nrho cov kev sib txuas hauv lub network kom paub tseeb tias tag nrho cov cables raug txuas zoo. Yog tias cov kev sib txuas tau zoo, cov kauj ruam tom ntej yog los xyuas cov khoom siv kho vajtse ntawm lub network, xws li cov kav hlau txais xov, cov khoom siv hluav taws xob, thiab cov amplifiers, kom paub tseeb tias lawv ua haujlwm zoo. Yog tias cov khoom siv kho vajtse ua haujlwm tau zoo, cov kauj ruam tom ntej yog kuaj xyuas cov software ntawm lub network, xws li encoder thiab modulator, kom paub tseeb tias lawv tau teeb tsa zoo. Yog tias cov khoom siv software tsis raug teeb tsa kom raug, nws yog ib qho tseem ceeb uas yuav tsum ua raws li cov chaw tsim khoom cov lus qhia kom rov pib dua qhov chaw. Nyob ntawm qhov teeb meem, nws yuav tsum tau hloov kho lub firmware lossis software mus rau qhov tseeb version. Thaum tag nrho cov kev sib txuas thiab cov khoom raug kuaj xyuas thiab ua haujlwm kom raug, cov kauj ruam kawg yog sim lub network kom paub tseeb tias nws ua haujlwm raws li qhov xav tau.

Yuav Ua Li Cas Xaiv Qhov Chaw Nres Nkoj rau SFN network?

• Xav txog kev tsheb: Xyuas kom tseeb tias cov chaw nres tsheb uas tau xaiv tuaj yeem npog cov kev loj nyob ib puag ncig.
• Xav txog Population Density: Coj mus rau hauv tus account cov kev xaiv uas tso cai rau cov kev pab them nqi ntawm cov neeg nyob densely xws li lub zos los yog lub zos.
• Xav txog Add-ons: Ntxiv cov ntsiab lus ntxiv hauv cov nroog loj nrog cov tsev siab nyob ib puag ncig.
• Xav txog Antenna Qhov siab: Khaws qhov kev ncua deb ntawm lub hauv paus chaw nres tsheb hauv 31 mais yog tias qhov chaw nres tsheb kav hlau txais xov qhov siab tau teeb tsa ntawm qhov chaw qis; Khaws qhov kev ncua deb ntawm lub hauv paus chaw nres tsheb hauv 62 mais yog tias qhov chaw nres tsheb kav hlau txais xov qhov siab tau teeb tsa ntawm qhov chaw siab.

Yuav teeb tsa SFN Network li cas?

1. Plannng chaw soj ntsuam thiab npaj rau kev daws teeb meem
2. Xaiv cov khoom siv thiab ntau npaum li cas
3. Muab tso rau hauv qhov chaw nruab nrab (AKA: thaj tsam ntawm kev sib tshooj) ntawm lub hauv paus chaw nres tsheb los ntawm kev ntsuas lub zog ntawm thaj chaw.

Tsis tas li ntawd, kev hloov pauv ntawm lub sijhawm sib npaug ncua mus rau qhov zoo tshaj plaws sync lub xeev ntawm qhov chaw nruab nrab ntawm cheeb tsam coherent yuav tsum ua raws li cov cai hauv qab no:

• TSIS TXHOB ntaus suab ntawm tib zaus hauv cheeb tsam coherent (saib xyuas thaum tsis muaj suab nrov)
• Tsis muaj qhov sib txawv ntawm qhov sib txawv ntawm cov suab nrov hauv cheeb tsam coherent (lub suab meej thiab suab paj nruag zoo nkauj)
• Tsis muaj qhov pom tseeb theem sib txawv distortion hauv cheeb tsam coherence (me ntsis suab nrov tom qab)
• Kev soj ntsuam cov ntsiab lus ntawm qhov system synchronization tshwm sim mus txog ntau dua 4 cov ntsiab lus (tshwj tsis yog rau thaj chaw ntxoov ntxoo)

Dab tsi yog cov kev cai rau FM SFN Network?

Txhawm rau txhawm rau tshaj tawm xov xwm zoo nrog SFN Network, cov teeb meem cuam tshuam hauv thaj chaw sib koom ua ke yuav tsum tau daws ib zaug thiab rau tag nrho, thiab ntawm no yog 4 yam tseem ceeb uas yuav tsum tau txiav txim siab tag nrho, uas yog:

Guarantee txaus Field Strength

Nws yog qhov yuav tsum tau muaj kev pab cuam txaus txaus nyob rau hauv txhua qhov chaw xa khoom siv hauv qhov system.

Co-Frequency

Nyob rau hauv FM synchronous broadcasting system, qhov sib txawv zaus sib txawv ntawm tus cab kuj thiab tus tsav zaus ntawm ob lub transmitters uas nyob ib sab yog tsawg dua 1 × 10-9, qhov ruaj khov ntawm qhov siv zaus ntawm txhua qhov chaw nres tsheb ≤5 × 10-9 / 24 teev.

Hauv theem

Hauv FM synchronous broadcasting system, nyob rau tib lub ntsiab lus nyob rau hauv cheeb tsam coherence, lub sij hawm txheeb ze sib txawv ntawm cov modulated signals kis tau los ntawm ob qho tib si transmitters:

• Mono tshaj tawm ≤ 10μS
• stereo tshaj tawm ≤ 5μS.

Hauv FM synchronous broadcasting system, theem ncua kev ruaj ntseg ntawm cov teeb liab modulated ntawm txhua lub transmitter:

• Zoo tshaj ± 1μS (1KHZ, siab tshaj qhov sib txawv: ± 75KHZ, 24 teev).

Co-Modulation

• Hauv FM synchronous tshaj tawm xov xwm, qhov kev hloov pauv kev ua yuam kev ntawm ob lub xov tooj cua uas nyob ib sab yog ≤3%
• Nyob rau hauv FM synchronous broadcasting system, txhua lub transmitter yuav tsum tau hloov kho stability ≤2.5% (1KHZ, siab tshaj zaus sib txawv: ± 75KHZ, 24 teev).