文獻(xiàn)綜述題目學(xué)生姓名專業(yè)班級(jí)電學(xué)號(hào)院（系）指導(dǎo)教師完成時(shí)間2010年06月05日A1A0A2A3A4A5A6A7A8A9A101室內(nèi)移動(dòng)通信系統(tǒng)的優(yōu)化摘要隨著移動(dòng)通信的發(fā)展，用戶在大型建筑物（尤其是酒店、商務(wù)和商務(wù)中心）內(nèi)使用移動(dòng)電話所產(chǎn)生的話務(wù)量日益增加。此時(shí)，用戶已不滿足只有室外覆蓋良好的移動(dòng)通信服務(wù)，同時(shí)也要求網(wǎng)絡(luò)運(yùn)營(yíng)能提供室內(nèi)覆蓋很好的移動(dòng)通信服務(wù)。但此類場(chǎng)所由于其建筑體本身的原因，往往是網(wǎng)絡(luò)覆蓋的盲區(qū)或信號(hào)特別差。因此，解決好室內(nèi)覆蓋，對(duì)滿足用戶的需求，提高網(wǎng)絡(luò)的通信質(zhì)量，以變得越來(lái)越重要。關(guān)鍵詞內(nèi)信號(hào)通信系統(tǒng)1室內(nèi)通信信號(hào)分布系統(tǒng)的組成室內(nèi)通信信號(hào)分布系統(tǒng)主要由信號(hào)源和信號(hào)分布系統(tǒng)兩部分成。信號(hào)源的產(chǎn)生主要是通過(guò)直放站、增加微蜂窩基站和增加微蜂窩基站加直放站3種方式產(chǎn)生的，如圖1所示。直放站做信號(hào)源時(shí)，信號(hào)源的提去主要通過(guò)直放站的施主G3837G13459直G6521G1186G19480G17829基站提G2474信號(hào)G727用G13818G2524G3132G1186G19480G17829基站G13818G2524部分信號(hào)通過(guò)G1821G13432G1268G17877G2052盲區(qū)內(nèi)的直放站。用G13818G2524G3132G1186G19480G17829基站G13818G2524部分信號(hào)通過(guò)電G13530G1268G17877G2052盲區(qū)內(nèi)的直放站。A121A11A13A14A15A16A17A18A12信號(hào)分布的基本方式主要是G7092源G3837G20316分布方式、有源分布方式、G1821G13432分布方式和G8856G9443電G13530分布方式。G7092源G3837G20316分布方式通過(guò)G7092源G3132G1226和G3837G13459、G20316G13459，G4570信號(hào)G1268G17877和分G18209G2052室內(nèi)所需G10627G3671，以得G2052良好的信號(hào)覆蓋。有源分布方式通過(guò)有源G3132G1226和G3837G20316G13459G17839G15904信號(hào)放大和分G18209。G1821G13432分布方式主要G2045用G1821G13432來(lái)G17839G15904信號(hào)分布。G17878G2524于大型和分G6967型室內(nèi)G10627G3671的主G17347信號(hào)的G1268G17767。G8856G9443電G13530分布方式信號(hào)源通過(guò)G8856G9443電G13530G1268G17767信號(hào)，G5194通過(guò)電G13530外G4560體的G980系G2027G5332G2487，在外G4560體G990產(chǎn)生G15932G19766電G8981，A11A13A19A20A21A22A16A17A23A24A252G1186G13792在電G13530G5332G2487G3800G8190G6142G19766G990G5430成電G11925場(chǎng)，G17837G1135G5332G2487G4613G11468G5415于G980系G2027的G3837G13459G17227G2052信號(hào)的發(fā)G4568和G6521G6922G1328用。G4439G17878用于G19579G17959、G3332G19093、G19283G5278G12573G3332G5430。G5647的來(lái)G16840，信號(hào)分布系統(tǒng)G7693G6466覆蓋區(qū)G3507的G1867體G5785G1929，G13464G2524G7092源、有源、G1821G13432、G8856G9443G12573方式，G17839G15904G13520G2524G5627的分G7524。在G4466G19481使用中，室內(nèi)分布系統(tǒng)G2499使G8611G1022微蜂窩覆蓋G14551G3272增G14279G1972G2325G4630G8016G5050G2503G727如G7536加G16025G5190G13459放大G3132，覆蓋G14551G3272G17836G2499大G5145G5242增加。G980G1022G4448G3803的室內(nèi)分布系統(tǒng)G5224能G3827通過(guò)G980G4570G17837場(chǎng)所的G8611G980G3800的基站G990G15904信號(hào)G6922G19610G2052G2530，G3355G2260G3332G17877G17810特G4462的G6521G2487A262室內(nèi)通信信號(hào)分布系統(tǒng)的設(shè)計(jì)G7512成室內(nèi)通信信號(hào)分布系統(tǒng)的主要G16786G3803是G726G20316G13459、G3837G13459、G5190G13459放大G3132、G5322G19283放大G3132以G2462G13818G2524、G2163分G12573G7092源G3132G1226。在系統(tǒng)G16786G16757G990主要G13783G15397的是能量分G18209的G19394G20076。室內(nèi)覆蓋系統(tǒng)的G16786G16757，G2265G6336微蜂窩系統(tǒng)、G1268G17767系統(tǒng)、室內(nèi)分布系統(tǒng)、電源系統(tǒng)G18614部分內(nèi)G4493。G16786G16757G13783G15397的主要因G13044G726信號(hào)源、場(chǎng)G5390分布、G990G15904信G3134G8616、互調(diào)G5190擾、G990下G15904平衡、G1268G17767和分G18209損耗、施工難G5242、造價(jià)。場(chǎng)G5390分布的G980般G16786G16757標(biāo)準(zhǔn)如G159321所示。A27A28A29A30A27A28A29A30A31A32A3385DBMA38A39A3399A40A41A4212DBA43A44A45A46A33515DBMA47A48A49A50A51A5295A59A60A61A62A63A64120DBMA65A66A67A68A69A70A71A72場(chǎng)G5390分布室內(nèi)空間G1268G17767損耗模型G726LPL10NLGD（米）FAF式中，PL為距G3837G134591米G3800的G17347徑衰漸典型值為30DB。N為同G4630衰減指數(shù)G726辦公G8016中，N325G727G980般建筑中，N276G727商場(chǎng)中，N218。FAF為G17347徑損耗G19480加值G726玻璃的FAF為8DBG727隔墻的FAF為1015DBG727預(yù)制板的FAF為2030DB。在G990G15904信G3134G8616的G16786G16757中，如G7536基站的白G3134聲為120DBM，為了保證G6521G6922機(jī)的靈敏G5242，需要G16786置G990G15904增益，使G990G15904鏈G17347的G5647G17767入G3134聲小于120DBM。如基站G17767出P43DBM，G17767入G2052直放站為40DBM，即有效G17347徑損耗為83DB，那么直放站的G990G15904增益G16786置G980G4462要小于83DBG727如只有直放站是有源G3132G1226，G3134聲系數(shù)為5DB，增益G5224G16786為小于78DB。如增益G16786為80DB，直放站G5647的G3134聲115DBM（白G3134聲G3134聲系數(shù)），在G17767出G2487變?yōu)?5DBM，經(jīng)過(guò)83DB的有效G17347徑損耗G17767入G2052基站為118DBM，大于源G3134聲120DBM，使基站G6521G6922機(jī)靈敏G5242A11A13A19A20A21A22A16A17A23A24A253降低2DB。通過(guò)理論分G7524，G4448成室內(nèi)覆蓋系統(tǒng)的G16786G16757，如圖2所示。A122A11A13A14A15A16A17A73A74A12G980G1022好的室內(nèi)覆蓋系統(tǒng)G5224該以最少的G16786G3803滿足G16786G16757要求G727不會(huì)因增加室內(nèi)覆蓋系統(tǒng)G13792影響整G1022網(wǎng)絡(luò)的G5627能G727G5224該兼G4493所有移動(dòng)通信體制G727使用壽命G19283，G1867有遠(yuǎn)程監(jiān)控能力，管理維護(hù)方便。32G/3G共網(wǎng)下的室內(nèi)通信信號(hào)分布系統(tǒng)優(yōu)化在G7092G13459網(wǎng)絡(luò)優(yōu)化領(lǐng)G3507，2G和3GG1861網(wǎng)下的3G室內(nèi)覆蓋改造對(duì)于室內(nèi)分布系統(tǒng)有著重大的意義,首先,2G和3G通過(guò)高效的G2524G17347,在滿足室內(nèi)2G和3G覆蓋的前提下，G1861用大量的G3837G20316G3132G1226G2499以避免重復(fù)建G16786,節(jié)約大量的成本G727其次，3G室內(nèi)覆蓋的改造算法G2499以優(yōu)化G7092G13459信號(hào)的覆蓋和G3837G13459G2487信號(hào)的質(zhì)量G727最G2530，通過(guò)優(yōu)化的3G改造算法G2499以節(jié)約大量的3G信源。已有2G覆蓋的室內(nèi)分布系統(tǒng)，按照原有的2G覆蓋G16786G16757，系統(tǒng)的覆蓋和頻率往往不能滿足3G制式的需要（2G和3GG1861網(wǎng)的元G3132G1226工G1328頻段需涵蓋800MHZ2500MHZ），故需要改造原有2G室內(nèi)分布系統(tǒng)。筆者建議，基于2G室內(nèi)分布系統(tǒng)通過(guò)增加BBURRU的方式升級(jí)改造3G的室內(nèi)分布系統(tǒng)，以“高密G5242，低G2163率”的G3837G13459G2487布放原則，以系統(tǒng)造價(jià)最低和G3837G13459覆蓋G3355衡為目標(biāo)，通過(guò)改造G16786G16757G45703G的信號(hào)G2524G17347G20522G室內(nèi)分布系統(tǒng)中去。42G和3G共網(wǎng)覆蓋的現(xiàn)狀第G9802G先建G16786，在原有2GG16786G16757的基礎(chǔ)G990改造該系統(tǒng)的特點(diǎn)是增加G3837G13459G2487數(shù)A11A13A19A20A21A22A16A17A23A24A254量，重新布放G3837G13459位置保證覆蓋，更換G3132G1226保證2G和3G制式兼G4493，即保證G3132G1226工G1328頻段需涵蓋800MHZ2500MHZ。對(duì)已有的2G拓?fù)?，需要G17839G15904拓?fù)涓脑欤ＷC3G的G3837G13459G2487G2163率要求，G29042G的拓?fù)洌珿9994G2530在2G拓?fù)銰17839G159043GG2524G17347。G1863于G2524G17347點(diǎn)的G11842G4462、信源的G11842G4462，以G2462G2524G17347G2530如G1321G4445放3G信源G4570是系統(tǒng)G16786G16757的G1863G19202。第G11202G和3GG1861同新建該系統(tǒng)的特點(diǎn)是不G2475約G7475，在G16786G16757時(shí)G2499以按照3G的原則來(lái)G16786G16757，即G3837G13459G2487的低G2163率、高密G5242原則，G980般來(lái)G16840如G7536能保證3G的G3837G13459G2487G2163率覆蓋G4613能保證2G系統(tǒng)的覆蓋。因此，為了便于G1523G185043G改造的算法，2G和3GG1861同新建G2499以先按照3G原則G4462下G3837G13459G2487的需求，G45702G的G3837G20316拓?fù)渖?，G1889在2G拓?fù)銰990G17839G15904G2524G17347點(diǎn)的G11842G4462和信源RRU的布放來(lái)滿足3G的系統(tǒng)。5結(jié)束語(yǔ)目前，G1186移動(dòng)通信運(yùn)營(yíng)商的G6124G11065G11536G1821來(lái)G11487，室內(nèi)通信信號(hào)分布系統(tǒng)對(duì)于運(yùn)營(yíng)商提高服務(wù)G8712平、增G5390G12466G1117G4466力、G7653G12447G1237G1006G5430G16949，G1867有不G2499低G1284的G1328用。隨著移動(dòng)通信網(wǎng)絡(luò)優(yōu)化工G1328的G9157入展G5332，室內(nèi)移動(dòng)通信信號(hào)分布系統(tǒng)已經(jīng)成為G980種重要的優(yōu)化G6175段運(yùn)用于網(wǎng)絡(luò)優(yōu)化工G1328中。A11A13A19A20A21A22A16A17A23A24A255G3參考文獻(xiàn)G3A75A76A77WILLIANCYLEEA78A79A54A51A80A81A82A83A84A85A86A75A87A77A88A89A90A91A92A93A94A95A96A97A98A99A100A101A63A50A102A103A104A105A106A106A105A75A105A77A107A108A109A88A110A111A112A113A114A115A116A117A118A119A120A121A122A123A124A125A126A127A128A129A130A131A132A133A134A135A136A137A116A138A139A140A141A142A142A143A123A144A125A131A132A134A145A146A147A126A110A111A134A145A112A113A148A149A123A150A125A126A151A152A153A154A155A156A157A158A159A160A161A123A162A125A163A164A165A166A167A168A150A169A170A171A172A112A113A148A149A123A150A125A166A151A152A130A173A174A175A176A158A159A160A140A141A142A142A177A123A178A125A179A180A126A114A115A181A182A118A119A183A184A185A186A187A110A111A134A145A112A113A148A149A131A120A188A189A123A190A125A126A191A192A130A191A192A110A111A134A145A193A194A195A196A138A139A140A141A142A142A162A123A143A125A197A198A126A199A142A142A150A114A115A116A117A118A119A126A123A190A125A200A201A134A145A202A203A204A141A142A142A177A205A141A206A123A207A125CONCHIILA161WA208A204A209A210A211A204A212A213A214A215A216A126A217A218A219A220A221A134A145A118A119A222A223A224A159A225A157A226A175A176A158A159A160A123A227A125A228A229A230A140A231A232A233A140A234A235A236A166A237A238A110A111A134A145A123A150A125A166A151A152A130A154A155A156A157A158A159A160A140A141A142A142A207A123A199A125A239A240A241A140A198A242A243A166A217A218A110A111A134A145A118A119A123A150A125A166A151A152A130A154A155A156A157A158A159A160A140A177A199A199A143A123A177A142A125A244A245DAMPSA187A131A132A246A193A173A147A247A248A123A190A125A134A145A249A250A177A199A199A227A126A177A141A123A177A177A125A197A251A252A126A253A254A237A238A110A111A134A145A118A119A123A150A125A126A151A152A153A255A146A158A159A160A140A177A199A199A199A123A177A141A125A184A0A1A126A114A115A181A182A184A185A186A122A23A116A2A123A190A125A126A189A3A130A191A128A192A222A189A3A225A145A27A202A203A193A194A138A139A140A141A142A142A178A123A177A144A125A194A132A4A126A110A111A112A113A120A114A115A181A182A123A190A125A126A110A111A134A145A126A141A142A142A177A126A162A123A177A162A125A196A5A5A126A114A115A110A111A134A145A6A187A120A7A8A171A172A9A10A11A12A123A190A125A126A134A30A249A250A161A177A199A199A143A126A143A123A177A178A125A206A13A14A204A209A15A16A212A124A213A168A109A124A150A17A215A18A112A113A19A20A122A23A219A148A149A123A150A125A166A151A152A130A154A155A156A157A158A159A160A140A141A142A142A207A123A177A143A125A218A21A22A166A167A168A150A110A111A134A145A112A113A148A149A123A150A125A166A151A152A130A154A155A156A157A158A159A160A140A141A142A142A144A123A177A207A125A221A24A25A126A212A124A213A168A109A124A150A17A114A115A181A182A11A12A122A23A26A28A123A190A125A126A110A111A134A145A126A141A142A142A199A126A142A141A123A177A227A125A239A167A29A204A196A31A32A126A228A33A114A115A181A182A118A119A120A34A35A123A190A125A126A215A18A157A202A203A219A145A27A126A141A142A142A207A232A177A142A233A123A177A199A125A234A36A126A114A115A116A117A118A11