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1、移動(dòng)通信直放站的應(yīng)用與調(diào)測(cè) 【摘要】直放站(中繼器)屬于同頻放大設(shè)備,是指在無(wú)線(xiàn)通信傳輸過(guò)程中起到信號(hào)增強(qiáng)的一種無(wú)線(xiàn)電發(fā)射中轉(zhuǎn)設(shè)備。直放站的基本功能就是一個(gè)射頻信號(hào)功率增強(qiáng)器。直放站在下行鏈路中,由施主天線(xiàn)現(xiàn)有的覆蓋區(qū)域中拾取信號(hào),通過(guò)帶通濾波器對(duì)帶通外的信號(hào)進(jìn)行極好的隔離,將濾波的信號(hào)經(jīng)功放放大后再次發(fā)射到待覆蓋區(qū)域。在上行鏈接路徑中,覆蓋區(qū)域內(nèi)的移動(dòng)臺(tái)手機(jī)的信號(hào)以同樣的工作方式由上行放大鏈路處理后發(fā)射到相應(yīng)基站,從而達(dá)到基地站與手機(jī)的信號(hào)傳遞。使用直放站作為實(shí)現(xiàn)“小容量、大覆蓋”目標(biāo)的必要手段之一
2、,主要是由于使用直放站一是在不增加基站數(shù)量的前提下保證網(wǎng)絡(luò)覆蓋,二是其造價(jià)遠(yuǎn)遠(yuǎn)低于有同樣效果的微蜂窩系統(tǒng)。直放站是解決通信網(wǎng)絡(luò)延伸覆蓋能力的一種優(yōu)選方案。它與基站相比有結(jié)構(gòu)簡(jiǎn)單、投資較少和安裝方便等優(yōu)點(diǎn),可廣泛用于難于覆蓋的盲區(qū)和弱區(qū),如商場(chǎng)、賓館、機(jī)場(chǎng)、碼頭、車(chē)站、體育館、娛樂(lè)廳、地鐵、隧道、高速公路、海島等各種場(chǎng)所,提高通信質(zhì)量,解決掉話(huà)等問(wèn)題。 【關(guān)鍵詞】直放站;移頻直放站;同頻直放站;直放站維護(hù);放大器;天線(xiàn);基站;上行;下行 Letstanduntiltheapplicationandma
3、intenance GaoRui (ShanxiTianyuancommunicationdesignconsultingCo.,LTDXi'anShanxi710075) 【Abstract】:Letstanduntil(Repeaters)belongtosamefrequencyamplifierequipment,referstothewirelesstransmissionprocesssignalenhancementofaradiotransmittingtransferequipm
4、ent.Thebasicfunctionoftheworkstationrfsignalisapowerincrease.Letstandstraightindownlinkantenna,thebenefactoroflinkexistingcoverageofsignal,pickthroughbandpassfiltertotakeTongWaisignaloftheextremelygoodisolation,filteringsignalamplifieramplificationagaina
5、fterthelaunchtostaycoverage.Theuplinklinkpath,coveringareaofmobilehandsetsignalsinthesamewayofworkingbyuplinkamplificationlinktothecorrespondingprocessingbaseafterlaunch,thusachievedthebasestationandmobilephonesignaltransmission.Usestraightaslittleputlar
6、gecapacity,coveringthenecessarymeansone,ismainlyduetotheuseofworkstationinthenumberofbasewithoutincreasingthepremisetoguaranteethatthenetworkcovers,2itisfarbelowthecostofhavethesameeffectmicrocellssystem.Letstanduntilistosolvethecommunicationnetworkcover
7、ingcapacityofakindofoutspreadoptimalscheme.Ithassimplestructure,basewithlessinvestmentandconvenientinstallationetc,andcanbewidelyusedfortheblindtocoverandweakarea,suchasthemarket,hotel,airport,dock,station,gym,recreation,subway,tunnel,highway,island,impr
8、ovecommunicationetc.Variousplaces,tosolvethequalityproblemssuchastodropwords. 【Keywords】Workstation,frequencyshiftworkstation;Withfrequencyworkstation;Workstationmaintenance;Amplifiers;Antenna;Stations;Upward;Downward 1.
