1、外文文獻TD indoor distribution system designTD-SCDMA ， indoor distribution system rehabilitation programsWith the high-speed advancementof information technology, individual users of hand-held communication devices increasing number of demand for communication services is also rising, followed by the wi

2、reless coverage requirements are also increasing. According to statistics, used in mobile phones, the number of indoor users greater than the number of outdoor users than 2 times, the users tend to use the mobile phone in the indoor. However 3G band higher signal penetration is weak, it is difficult

3、 to realize the depth of indoor coverage.TD-SCDMA network-based data services, while most of the data traffic occurred in the room, so early in the TD-SCDMA network construction, the introduction of TD-SCDMA indoor hot spots in some indoor distribution system is very necessary. Implementation of ind

4、oor coverage projects, buildings traffic can generally be increased 1.4 times, and at the same time reduce the outdoor network load and expansion pressure, reducing the outdoor networks overall interference and improve the quality of network services.1 .TD-SCDMA indoor distribution system characteri

5、sticsTD-SCDMA indoor distribution system compared to other indoor distribution system of the communication system has the following characteristics:（1）TD-SCDMA indoor distribution system using smart antenna system coverage, capacity and quality are affected. No shaping gain downlink traffic channel,

6、 business channel downlink power 6dB 8dB lower compared with outdoor coverage. Due to the lack of smart antenna uplink interference is not well controlled.( 2) the coverage of the common channel and the traffic channel be considered separately. Since forming gain smart antenna indoor business channe

7、l, so it is a business channel coverage limited system. TD-SCDMA pilot power can be flexibly set according to the requirements of, not a fixed value.business coverage is basically the same. Respiratory effects of the TD-SCDMA system is not obvious, the business of various rate basically covered the

8、same diameter.support asymmetric data services, according to the traffic up and down to adjust the time slot configuration.working band, big loss, poor signal indoor propagation, deep cover difficult.To reduce indoor, outdoor interference, indoor, outdoor is more suitable forusing different frequenc

9、y Zuwangfangshi.In the indoor distribution area to the outdoor coverage area movement, can not use relay switching, can select only the hard handover.for control system equipment delay. The maximum radius of the TD-SCDMA base stations covering 11.25km, which requires indoor distribution system relay

10、 device is not large transmission delay, to ensure that the interference between downlink.using the uplink synchronous technology, improve the technical requirements of the repeater and dry amp.The majority of sources need to introduce a separate GPS antenna, and select a suitable location for insta

11、llation.TD-SCDMA indoor distribution system constructionprinciplesTD-SCDMA indoor distribution system construction should consider the needs of the coverage, capacity, quality unified. Constrained by the proximity effect, consider a single antenna coverage should be balanced design. And other commun

12、ication systems between interference and multi-system power sharing 2G indoor distribution system, you need to pay attention to the match. According to the TD-SCDMA technology features, this paper presents the following TD-SCDMA indoor distribution system construction principles.meet the target area

13、 of coverage, capacity, quality demand;to build a comprehensive distribution system, using broadband passive devices;To conserve resources, try to share the existing indoor antenna distribution system;to minimize the impact on existing 2G systems;reasonable power configuration to minimize the use of

14、 the TD-SCDMA dry release;to minimize passive components, reduce device insertion loss;considering the construction and operation and maintenance costs;take full account of the system compatible, upgrade, expansion capability. According to the above principles，the source selection need to consider t

15、hefollowing factors: coverage，capacity and quality requirements of the building, and give due consideration to the long-term business development needs of buildings; whether the source installation location，whether to meet to take power conditions Third，network conditions，and signal transmission in

16、place around.Coverage, such as switching and interference factors to consider in the design of the distribution system. Which coverage should take into account the distribution of signal power，signal link loss，terminal receiver sensitivity and power margin factor; switch including outdoor indoor swi

17、tch ，indoor switch, switch elevators inside and outside，and should also consider switching area, switch，handover success rate factors; interference should take into account the interaction of the original system and the 3G system before and after the opening of the 3G system.To reduce the impact of

18、indoor distribution system for outdoor systems need to meet the following conditions: In addition to the provisions of the edge of the indoor signal level ， indoor coverage system is not over covers outdoor and indoor distribution system in a building 10 meters away from built indoor signal should b

19、e higher than 9dB above outdoor strongest signal level is low ，or indoor signal from leaking to the outside at 10 meters of the pilot signal strength is not higher than-95dBm.distribution system shared analysisWhen multiple systems share a common distribution system， power matching is the biggest pr

20、oblem. Power matching the need to consider the difference of the signal source output power，different band signals in the difference of the transmission loss in the distribution system， the edge coverage field strength of the different requirements of the different frequency bands in the signal spac

21、e propagation loss differences and other factors.In the same distribution system to a plurality of system signal source coupled directly huge the remaining allowable loss difference obtained by the different systems. In all systems, CDMA800 ， GSM, and DCS1800 coverage effect is best， WCDMA and TD-SC

22、DMA effect，followed by the worst effects of the PHS and WLAN coverage. In the distribution system，the system branch loss of about 5dB，an insignificant difference， so share the branch of the distribution system is not difficult. The same time，the system of trunk loss of 2dB，seems more suitable shared

23、. Various systems，however，due to the need for capacity and power to match，in the dry roads to do a different approach，TD-SCDMA multi-system shared distribution system，the trunk is difficult to share ， except small-scale distributed systems.distribution system reform programIndoor distribution system

24、 to solve the primary problem，which is a good wireless signal coverage for indoor users. Usually in accordance with the size and type of buildings，indoor distribution application scenarios are divided into: the miniature building area (6000m2)，a small building (6000m2 12000m2 area)，medium-sized buil

25、dings (12000m2 60000m2 area) and large building area (60000m2). Retrofitting existing indoor coverage system， you can perform the following steps:to collect the existing distribution system design，information including topology interface，power configuration and cable type，length， etc.;verification o

26、f existing passive devices, some devices need to be replaced to ensure its support for TD-SCDMA band;the input power of each distributed antenna recalculated;the typical floors calculate the coverage of each antenna distance and blocking;According to the topology diagram of the antenna of each anten

27、na input power and typical floor, verification of the signal coverage of the floors;(6)based on each floor of the signal output power and topology, to identify the active node of the device erected position;(7) to determine the trunk routing and TD-SCDMAsignal source location. Thefollowingfour diffe

28、rent specifications of TD-SCDMAindoor distribution systemrehabilitation programs.4.1 micro-architecturalMicro-architectural interior area is smaller, the input power of the signal source is limited, distribution systems using passive devices, the TD-SCDMA signal input port coupled directly in the 2G

29、 signal source, using the same position combiners achieve distribution system shared. Micro-distribution system in the transformation of the way, we need to confirm two things: First, check whether the original passive devices support TD-SCDMA bands, if not support, couplers, power dividers and othe

30、r passive components to be replaced as broadband devices. The second is to check the adequacy the original distributed antenna density propagation loss, according to the interior space. If the original distribution system can not be used directly, we need to increase the distribution of the number o

31、f antennas, and based on this, reducing the 2G signal source power.4.2 small constructionIn the early 2G distribution system, the use of many 6D, 8D feeder, which make the 2G/3G communication system loss difference to increase. In this case, can be used the same position sub circuit simply part of t

32、he feeder replacement more coarse attenuation smaller feeder can be.Small distribution system, the same should be to consider the passives bandwidth and distributed antenna density TD-SCDMA system meets the requirements of (the same). In this scenario, it is necessary to reduce the output power of t

33、he original 2G equipment, in order to ensure that the power constant of the antenna port.4.3 medium-sized buildingsIn a medium-sized indoor distribution system, often dry release and other active equipment. At this time, TD-SCDMA signal source of a single channel can not meet the power requirements

34、of the distribution system, and therefore can not use the same location sub circuit, only end combiners shared branch distribution system, but can not share a dry road distribution system .2G/3G dry put is an optional device, not mandatory devices. In this scenario, in the case does not increase the

35、 number of distributed antenna, due to the introduction of the TD-SCDMA combiner, brought the power of the insertion loss, the output of the original 2G equipment should be slightly improved, in order to ensure that the power constant of the antenna port.4.4 large buildingsIn large indoor distributi

36、on system, usually in the optical fiber distribution system, comprising the optical amplifier and an optical coupling device. At this point, the use of a single TD-SCDMA signal source has failed to meet the power requirements of the distribution system, BBU + RRU as the signal source end Combiner.Th

37、e 2G/3G transformation box, 2G and 3G signal light dry put at combiner and convert the RF signal coverage branch distribution system in buildings. 2G Distributor distribution system using the optical transmission system in the premises the 3G Distributor distribution systems can take advantage of th

38、e building existing optical fiber, or re-laying fiber.SummaryThe construction of the TD-SCDMA indoor coverage system, to make full use of the buildings has been indoor distribution system. In this paper, the characteristics of TD-SCDMA indoor distribution system, come to the basic principle of the c

39、onstruction of the TD-SCDMA indoor distribution system. TD-SCDMA and other communication systems shared indoor distribution system power matching, micro, small, medium and large four typical 2G distribution system rehabilitation programs of the TD-SCDMA. The rehabilitation programs take full account

40、 of the 2G indoordistribution system status and technical characteristics of TD-SCDMA, change the existing distribution system and building a faster, less investment, easy maintenance.附錄 B：外文翻譯TD 室內(nèi)分布系統(tǒng)的設(shè)計TD-SCDMA 室內(nèi)分布系統(tǒng)改造方案隨著高速信息技術(shù)的進步， 手持通信設(shè)備的私人用戶的增加越來越多的通信服務(wù)的需求也不斷提高， 其次是無線覆蓋的要求也日益提高。據(jù)統(tǒng)計，在手機使用時，用戶室

41、內(nèi)比室外用戶的2 倍以上的數(shù)量越多，用戶伸開在室內(nèi)使用手機。但是 3G 信號穿透較高頻段是弱，難以實現(xiàn)室內(nèi)覆蓋的深度。TD-SCDMA 網(wǎng)絡(luò)為基礎(chǔ)的數(shù)據(jù)服務(wù)，而大部分的數(shù)據(jù)流量發(fā)生在室內(nèi)，在TD-SCDMA網(wǎng)絡(luò)建設(shè)這么早，引進TD-SCDMA室內(nèi)熱點在某些室內(nèi)分布系統(tǒng)是非常必要的。室內(nèi)覆蓋工程的實施，建筑物一般流量可以增加1.4 倍，同時降低了網(wǎng)絡(luò)負載和室外壓力膨脹， 降低了網(wǎng)絡(luò)的整體戶外干擾， 提高網(wǎng)絡(luò)服務(wù)質(zhì)量。1、 TD-SCDMA室內(nèi)分布系統(tǒng)的特性TD-SCDMA 室內(nèi)分布系統(tǒng)相比其他分布系統(tǒng)，TD-SCDMA 室內(nèi)分布系統(tǒng)具有以下特點：（1）采用智能天線系統(tǒng)的覆蓋，容量和質(zhì)量的 TD-

42、SCDMA 室內(nèi)分布系統(tǒng)都會受到影響。 無增益成形的下行業(yè)務(wù)信道， 業(yè)務(wù)信道下行鏈路功率 6 分貝 ?8 分貝用較低的室外覆蓋相比。 由于缺少智能天線的上行鏈路干擾的沒有很好的控制。（2）公共信道的覆蓋范圍和通信信道被分開考慮。由于形成增益智能天線室內(nèi)信道的業(yè)務(wù)， 所以它是一個企業(yè)的渠道覆蓋面有限的系統(tǒng)。 TD-SCDMA 的導(dǎo)頻功率可以靈活九月根據(jù)的，而不是一個固定值的要求。（3）業(yè)務(wù)范圍基本相同。在 TD-SCDMA 系統(tǒng)的呼吸效應(yīng)不明顯，不同速率的業(yè)務(wù)基本覆蓋了直徑相同。（4）支持非對稱數(shù)據(jù)業(yè)務(wù)，根據(jù)交通上下調(diào)整時隙配置。（5）工作頻段，損耗大，不良的室內(nèi)信號傳播，深覆蓋困難。（6）為了

43、減少室內(nèi)，室外的干擾，室內(nèi)，室外，更適合使用不同頻率的組網(wǎng)方式。（7）在室內(nèi)到室外區(qū)域分布覆蓋區(qū)域移動，不能使用繼電器切換，只能選擇硬切換。（8），用于控制系統(tǒng)設(shè)備的延遲。 在 TD-SCDMA 基臺覆蓋 11.25 公里的最大半徑，闕室內(nèi)分布系統(tǒng)需要中繼設(shè)備并不大傳輸時延，以確保之間的下行鏈路的干擾。（9）利用上行同步技術(shù)，提高中繼器和干放的技術(shù)要求。（10）大部分的來源需要輸入一個單獨的GPS 天線，并選擇一個合適的位置安裝。2、TD-SCDMA 室內(nèi)分布系統(tǒng)建設(shè)原則TD-SCDMA 室內(nèi)分布系統(tǒng)建設(shè)應(yīng)考慮的覆蓋，容量，質(zhì)量統(tǒng)一的需要。由鄰近效應(yīng)的制約， 相當大的一個天線覆蓋范圍應(yīng)該是平衡

44、的設(shè)計。通信系統(tǒng)等多系統(tǒng)的干擾和電源共享的2G 室內(nèi)分布系統(tǒng)之間，你需要注意的匹配。根據(jù)TD-SCDMA 技術(shù)的特點，本文提出以下的 TD-SCDMA 室內(nèi)分布系統(tǒng)建設(shè)原則。（1）滿足覆蓋，容量，質(zhì)量需求的目標區(qū)域 ;（2）建立完善的分銷系統(tǒng)，利用寬帶無源器件;（3）為了節(jié)約資源，盡量共享現(xiàn)有的室內(nèi)天線分布系統(tǒng) ; （4）盡量減少對現(xiàn)有 2G 系統(tǒng)的影響 ;（5）合理的電源配置，以盡量減少使用 TD-SCDMA 干放的 ; （6）盡量減少被動元件，降低了設(shè)備的插入損耗 ; （7）考慮到建設(shè)和運營維護成本 ;（8）充分考慮了支持系統(tǒng)，升級擴展能力。根據(jù)上述原則，需要源選擇考慮以下因素：覆蓋，容量

45、和建筑質(zhì)量的要求，并充分考慮到建筑物的長期業(yè)務(wù)發(fā)展需要給予 ;無論源安裝位置，無論取電，以滿足三條件，網(wǎng)絡(luò)條件和到位信號傳輸身邊。覆蓋范圍：如切換和干擾因素， 在配電系統(tǒng)的設(shè)計考慮。 其中應(yīng)考慮到覆蓋信號功率的分配，信號鏈路損耗，終端接收靈敏度和功率裕度系數(shù) ;開關(guān)包括開關(guān)室內(nèi)室外，室內(nèi)開關(guān)，開關(guān)內(nèi)部和外部的電梯， 并且也要考慮切換區(qū)域， 開關(guān)，切換成功率的因素 ;應(yīng)當考慮到干擾之前和之后的 3G 系統(tǒng)的開放原系統(tǒng)和 3G 系統(tǒng)之間的相互作用。為了減少室外系統(tǒng)的室內(nèi)分布系統(tǒng)的影響需要滿足以下條件： 除了室內(nèi)信號電平的邊沿價格提供商， 室內(nèi)覆蓋系統(tǒng)是不是在涵蓋室外和室內(nèi)分布系統(tǒng)的建設(shè)10 米遠從

46、內(nèi)置室內(nèi)信號應(yīng)比以上 9 分貝室外最強信號電平較高的為低，或泄漏到外面在 10 米的導(dǎo)頻信號強度的室內(nèi)信號不超過 -95dBm 的更高。3、 分布系統(tǒng)共享分析多個系統(tǒng)共享一個公共分配系統(tǒng)，動力匹配是最大的問題。功率匹配，需要考慮信號源的輸出功率之差，在傳輸損失的在配電系統(tǒng)中，不同頻帶的不同要求在信號空間傳播損耗的邊緣覆蓋場強的差值不同頻帶信號差異等因素。在同一個配電系統(tǒng)，以直接耦合巨大差異的不同系統(tǒng)獲得剩余容許損耗系統(tǒng)信號源的多元性。在所有的系統(tǒng)中， CDMA800 ，GSM，DCS1800 和覆蓋效果最好，WCDMA 和 TD-SCDMA 的影響，其次是小靈通和 WLAN 覆蓋的最壞影響。在配電系統(tǒng)中， 約 5 分貝相差不大時， 系統(tǒng)分支損耗從而共享分發(fā)系統(tǒng)的分支并不困難。同時，為 2dB 樹干損失的制度，似乎更適合共享。各種系統(tǒng)，但是呢，由于需要對容量和功率匹配，在干燥路面上做了不同的方式， TD-SCDMA 的多系統(tǒng)共享分發(fā)系統(tǒng)，主干是難以共享，除了小