本文關(guān)鍵詞：超寬帶室內(nèi)分布系統(tǒng)的應(yīng)用　出處：《吉林大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 超寬帶 波分復(fù)用 深度覆蓋 環(huán)形組網(wǎng)

【摘要】：近幾年，通信領(lǐng)域的室內(nèi)分布系統(tǒng)進(jìn)行了大規(guī)模的深度覆蓋，但隨著使用量的增加，同軸分布系統(tǒng)的各種弊端開始顯現(xiàn)，如在傳輸過程中損耗大，無法進(jìn)行大規(guī)模覆蓋；由于中繼設(shè)備底噪高，導(dǎo)致室內(nèi)呼叫消耗室外資源，，無法有效分擔(dān)室外宏蜂窩的負(fù)荷和擴(kuò)容壓力；由于WLAN業(yè)務(wù)的增加，需在原有系統(tǒng)中頻繁的合路、分路等問題。而超寬帶以其獨(dú)特的優(yōu)越性逐漸進(jìn)入人們的視野。 超寬帶系統(tǒng)采用波分復(fù)用技術(shù)，可以支持多網(wǎng)絡(luò)制式于同一根光纜傳輸，是可以商用化的最簡單的新型室內(nèi)分布技術(shù)。超寬帶分布系統(tǒng)是由數(shù)字POI、數(shù)字拉遠(yuǎn)單元和光覆蓋單元組成。分為信源、主干、天饋三個(gè)分部。其中，信源是由運(yùn)營商提供，可多制式輸入；主干是由數(shù)字POI（即多系統(tǒng)合路平臺，POINT OFINTERFACE）和數(shù)字拉遠(yuǎn)通過大量光纖或者網(wǎng)線連接，組網(wǎng)形式靈活，可星型、鏈型、樹型、環(huán)型組網(wǎng)。其中，環(huán)型組網(wǎng)為最優(yōu)組網(wǎng)形式，因其可二級備份，且環(huán)內(nèi)任意設(shè)備損壞不會影響其他設(shè)備運(yùn)行，極大的降低了數(shù)據(jù)存儲的風(fēng)險(xiǎn)。天饋連接部分同一般傳統(tǒng)的分布形式相同，可通過平層分布擴(kuò)大覆蓋范圍。對于室外及建筑物內(nèi)部結(jié)構(gòu)單一的場所，如小區(qū)、體育場、機(jī)場、會展中心等場所更可直接采用光纖天線系統(tǒng)的方式進(jìn)行覆蓋。 本文通過對超寬帶的特性和組網(wǎng)結(jié)構(gòu)的探討研究，闡述了超寬帶系統(tǒng)的優(yōu)越性，具體分為以下幾個(gè)方面： 第一、在話音質(zhì)量方面，結(jié)合超寬帶在室內(nèi)分布系統(tǒng)的實(shí)際應(yīng)用、測試，驗(yàn)證了超寬帶系統(tǒng)對室內(nèi)分布系統(tǒng)在通化質(zhì)量方面的優(yōu)化和改善。 第二、在帶寬方面，超寬帶系統(tǒng)把各制式的信源集中在POI處，由POI統(tǒng)一處理后經(jīng)OSU、ORU輸送到末端；相對于傳統(tǒng)的同軸分布系統(tǒng)，在末端合路的方式，不僅節(jié)省了合路器等器件的使用量，還節(jié)省了光纜資源。 第三、在組網(wǎng)結(jié)構(gòu)方面，傳統(tǒng)分布系統(tǒng)一般分為前后端，以星型、鏈型結(jié)構(gòu)組網(wǎng)。這種結(jié)構(gòu)，前端一般最多只能帶4臺后端，且后端越多光衰越大，對設(shè)備接收信源信號有較大影響。而超寬帶系統(tǒng)可以環(huán)形組網(wǎng)，不僅可以雙POI備份，且OSU之間最多可串聯(lián)30臺，對后端光衰影響也極小。 第四、在投資方面，傳統(tǒng)分布系統(tǒng)為了達(dá)到較好的場強(qiáng)覆蓋，需要在末端合路較多的3G或DSC設(shè)備，且由于設(shè)備的增加，傳輸方面也要配備同等的光纜資源，投資較大。超寬帶系統(tǒng)在單制式方面雖不具備競爭力，但在多制式合路的情況下，由于節(jié)省了信源設(shè)備、光纜資源、器件用量，較大的降低了投資造價(jià)。 本文通過對實(shí)驗(yàn)對象開通后的路測，論證了超寬帶系統(tǒng)對現(xiàn)網(wǎng)網(wǎng)絡(luò)的優(yōu)化強(qiáng)于傳統(tǒng)同軸分布，從一定層度上彌補(bǔ)了傳統(tǒng)分布系統(tǒng)的不足，對現(xiàn)網(wǎng)網(wǎng)絡(luò)的質(zhì)量具有提升意義。
[Abstract]:In recent years , the indoor distribution system in the field of communication has large - scale depth coverage , but with the increase of the use amount , the various disadvantages of the coaxial distribution system begin to appear , such as large loss during transmission and cannot be covered on a large scale ; due to the high noise of the relay equipment , outdoor resources can not be effectively shared , and the problems such as frequent closing and splitting in the original system are required due to the increase of the WLAN service , and the ultra - wide band gradually enters the field of view of people with its unique superiority . The ultra - wideband system adopts wavelength division multiplexing technology , which can support the transmission of multi - network system in the same optical cable , and is the simplest and novel indoor distribution technology which can be commercialized . The ultra - wideband distribution system is composed of digital POI , digital pull - off unit and light - covering unit . The ultra - wideband distribution system is composed of digital POI , digital pull - off unit and light - covering unit . This paper studies the characteristics of ultra - wideband and the structure of networking , expounds the superiority of ultra - wideband system , which is divided into the following aspects : First , in the aspect of voice quality , combined with the practical application and test of ultra - wideband in indoor distribution system , the optimization and improvement of indoor distribution system for indoor distribution system are verified . secondly , in the aspect of bandwidth , the ultra - wideband system focuses the information sources of the various modes at the POI , and is sent to the terminal through the OSU and ORU after unified processing by the POI ; and the method not only saves the usage amount of the combiner and the like in the end closing way , but also saves the optical cable resources . Third , in the aspect of networking structure , the traditional distribution system is generally divided into front and rear ends , and star - shaped , chain - structured networking . The front - end generally can only have 4 back - ends , and the larger the back - end is , the larger the optical attenuation , the more the device receives the source signal . The ultra - wideband system can be used as a ring - networking , not only can double - POI backup , and the maximum number of 30 sets can be connected in series between OSU , and the influence on the back - end optical attenuation is also very small . Fourthly , in the aspect of investment , the traditional distribution system needs more 3G or DSC equipment at the end closing path in order to achieve better field strength , and the same optical cable resources are required to be provided on the transmission side due to the increase of the equipment , and the investment is larger . In the case of multi - mode combining , the ultra - wideband system can save the investment cost because of saving the source equipment , the optical cable resources and the device usage . This paper proves that the optimization of the current network by UWB system is stronger than that of the traditional distribution system , and the defects of the traditional distributed system are compensated by the way of the channel measurement after the experiment object is opened , and the quality of the current network is improved .

【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TN915.03

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 陳峗;;淺談移動(dòng)通信系統(tǒng)三種切換技術(shù)[J];商品儲運(yùn)與養(yǎng)護(hù);2007年05期

2 趙麗麗;王莉;蘇麗娜;鞠曉潔;;淺談超寬帶無線通信技術(shù)的發(fā)展[J];數(shù)字技術(shù)與應(yīng)用;2011年03期

3 林海鵬;;數(shù)字光纖直放站的特點(diǎn)及應(yīng)用[J];通信與信息技術(shù);2011年04期

4 ;面向大眾市場的超寬帶技術(shù)[J];世界電子元器件;2004年12期

5 鄧安達(dá);史辛寧;汪穎;;綜合室內(nèi)覆蓋系統(tǒng)設(shè)計(jì)淺析[J];現(xiàn)代電信科技;2009年12期

6 楊雷;王丹;;超寬帶無線通信系統(tǒng)關(guān)鍵技術(shù)及應(yīng)用[J];科技創(chuàng)新導(dǎo)報(bào);2011年22期

相關(guān)碩士學(xué)位論文 前9條

1 高遠(yuǎn);超寬帶系統(tǒng)與其他通信系統(tǒng)頻譜共存特性的研究[D];河海大學(xué);2005年

2 梁t

本文編號：1397222