wcdma 中文意思是什麼

wcdma 解釋
常見縮略語
  1. Ntp protocol and its realization in wcdma system

    系統網路時間同步研究
  2. First, this paper gives a method, which is utilized by baseband system according to wcdma system capability requirements, using asic + dsp to realize raker, using dsp + dsp to realize symbol process. the hardware structure of asic + dsp and dsp + dsp is designed from the whole design view. then, the discussion is made of the main function module of ic2001 and dsp, hi module, dsp peripherals on chip such as hpi, edma and emif

    文章首先結合wcdma系統性能要求提出了基帶系統所採用的方案，由asic + dsp實現rake接收機功能和dsp + dsp實現符號級處理功能;然後從總體規劃的角度設計出asic + dsp和dsp + dsp系統硬體結構，對ic2001和dsp的主要功能模塊， hi模塊， dsp片上外設hpi口、 edma和emif總線作了分析，並結合基帶處理功能開發了系統驅動;最後由信號源發出測試數據進入系統，進行功能實現后輸出數據繪制出波形圖，對所設計的基帶系統驅動方案進行驗證分析。
  3. In the up link of wcdma the spread factor ranges from 4 - 256 and ranges from 4 - 512 in the down link of wcdma

    上行鏈路中擴頻因子變化范圍為4 - 256 。下行鏈路中，擴頻因子的變化范圍是4 - 512 。
  4. Test results show that under 2 - tone test in 5mhz tone spacing, the power amplifier system achieves - 50dbc imd3 with 20w output power, improved 20db in imd3 compared with the one without linearity. estimated value of aclr comes to 53db, which satisfies the 3gpp requirement for wcdma base - station transistor. further tests with alterative input power indicate a steady suppression to the imd3 controlled by the adaptive system

    測試結果表明，自適應前饋功放系統在雙音輸出功率20w時三階交調系數小於- 50dbc ，鄰通道泄漏抑制比（ aclr ）的估算結果大於53db ，在理論上滿足3gpp對wcdma基站發射機的指標要求。
  5. In the wcdma network, a variety of services and applications with the mobile station will be provided to us, such as the public safety service, vehicles and the traffic management, navigating, the city sightseeing etc, all of them must ascertain the accurate position of the moving station

    在wcdma網路中，將提供多種與移動臺位置有關的服務和應用，如公共安全服務、車輛和交通管理、導航和城市觀光等。移動定位技術已成為wcdma網路的核心技術之一，對各種定位方法和技術在wcdma網路中的實施和應用已經成為目前研究的熱點。
  6. The 3g demostration software is a simulator develop by c + + builder run on windows platform. with the hardware, it turned to be a wcdma mt, which used to show the most features that wcdma could offer to end user. at the meantime, this software could configure the parameter according to high - layer request and show the currentstatus the hardware

    3g虛擬手機工作在pc上，使用c builder進行開發，與移動臺硬體部分一起構成wcdma移動終端。在幾章側開發中可以配合基站開發進行調試，向用戶演示wcdma手機可以使用的服務和功能。
  7. Feedforward is generally known as the best performing linearization technique for its advantages, such as broadband, stability, etc. this paper introduces the theories of power amplifier nonlinear characters and feedforward technique. according to the rf specifications in 3gpp for wcdma transmitter power amplifier, an adaptive feedforward amplifier system is completed including eda simulation, circuits layout and main mechanical structure design

    本文根據3gpp對wcdma發射機功率放大器的射頻指標要求，在對功率放大器的非線性特性和前饋技術的特性進行詳細理論分析的基礎上，結合eda模擬工具，設計了基於自適應前饋的功放系統，並完成了系統的調試和測試。
  8. Based on in - depth study on the mc - cdma system structure, we proposed a combined power and rate control scheme for wcdma over fading channels

    在mc - cdma這種方案中，我們提出了功率控制優先於速率控制的演算法。
  9. Cto, sr. design engineer, oss bss engineer, wcdma system development engineer test engineer, wcdma baseband senior engineer, telecommunication protocol development engineer, 3g ran system test engineer, rf developer, hardware engineer, mobile phone structure designer, flow - media product manager, softswitch pre - sales engineer, sr. project manager, quality manager, purchase manager, sr. marketing manager oversea, regional product manager, sales manager, key account manager, admin. hr director, administration manager, international recruitment supervisor, financial manager, investment manager

    高級總體設計工程師oss bss軟體工程師wcdma系統開發工程師軟體開發測試工程師wcdma基帶高級工程師通信協議開發工程師3g ran系統測試工程師射頻研發人員手機射頻工程師手機硬體工程師手機結構造型設計工程師流媒體產品經理軟交換售前支持工程師高級項目經理知識產權經理品質部經理采購部經理高級海外市場營銷經理區域產品經理銷售經理大客戶經理人事行政總監行政經理國際招聘主管財務經理國際融資主管投資經理
  10. Algorithm study on step one cell search in wcdma

    第一步小區搜索演算法研究
  11. In wcdma system which uses direct sequence to spread spectrum, the spread spectrum code ( pn code ) phase of the receiver must be synchronized with that of the received signal precisely to despread and demodulate the signal correctly. multipath channel exists in the mobile communication environment for the radio signal reflection by obstacles between transmitters and receivers. by using the autocorrelation of the spread sprectrum code, rake receiver can process received signals and therefore multipath components can be resolvable

    在wcdma系統中，為正確解擴解調接收到的擴頻信號，接收機本地產生的擴頻碼（ pn碼）相位必須和接收信號中的擴頻碼相位完全同步;同時移動通信環境中的傳輸信號由於接收機和發射機之間的直達路徑有可能被建築物或其他障礙物所阻礙，總是經過折射或反射的多條路徑后才到達接收機，從而產生多徑通道。
  12. Wcdma use ovsf code as channel spread spectrum code. ovsf play an important role in. wcdma which offers flexible traffics

    Wcdma的通道擴頻採用了長度可變的正交碼序列，即ovsf碼用作擴頻碼。
  13. For implement of wide band modulation, multi - carries and elimination of adjacent channel interference to satisfy ber requirement in wcdma system, which is most popular in 3g technology, the linearity requirement of the base station power amplifier becomes tighter

    以wcdma為代表的第三代移動通信技術，為實現寬帶調制、多載波應用，同時減小鄰通道干擾以滿足通信系統的誤碼率要求，對基站發射機功放的線性指標要求苛刻。
  14. So, at the frequency 1920mhz, phs will be adjacent to wcdma uplink, there will be fairly strong adjacent channel interference between them, compared to phs and wcdma downlink, which could be neglected

    Phs系統將緊鄰wcdma系統的上行頻帶，在1920mhz頻點附近兩系統將會對彼此產生比較強的鄰頻干擾，由於頻帶距離較遠，可以忽略wcdma下行頻帶和phs之間的干擾。
  15. High speed uplink packet access ( hsupa ) is a new work item of technical specification release 6 in 3gpp. wcdma system. the techniques of this work item, i. e. node b controlled scheduling, hybrid arq with chase combining, shorter tti, are to improve the performance of uplink dedicated transport channels, i. e. to increase capacity and throughput and reduce delay

    在hsupa中通過採用基站nodeb控制調度、結合了軟合併的混合自動重傳請求（ harq ） 、更短的傳輸時間間隔（ tti ）等關鍵技術，不但增強了系統容量與覆蓋還使用戶設備（ ue ）能獲得更大的上行吞吐、更小的傳輸延時。
  16. Then we conclude that the cell capacity decrease dramatically under the high bit rate service ; the interference factor of ajacent cells and the orthorgonal factor are also important parameters to influence the cell capacity ; the downlink can accept more users than uplink, so the capacity of wcdma system will be limited in uplink

    從中得到結論，高數據速率的用戶將會佔用更多的系統資源，當數據業務增多時，小區用戶數下降很快；鄰近小區的干擾與正交性的優劣也是影響小區容量的重要因素；下行鏈路可以比上行鏈路容納更多的用戶，因此wcdma系統的容量將受限於上行鏈路。
  17. Zxw10 omc, which is developed by zte, implements the telecommunication network management of wcdma, and goes ahead on the way in the aspect of the development of tmn software for 3g interiorly

    中興通訊股份有限公司開發的「中興通訊統一操作與維護中心（ zxw10omc ） 」系統，實現了wcdma的電信網路管理，在3g電信網路管理軟體的開發上走在了國內前列。
  18. Based on 3gpp standard, the author analyzed and researched the higher protocol layers of radio interface in wcdma, including radio resource control layer ( rrc ), medium access control layer ( mac ) and radio link control layer ( rlc ), in which, the rlc is emphasis

    依據3gpp協議，作者對wcdma空中介面的高層協議部分進行了分析和研究，包括無線資源控制層（ rrc層） 、媒體接入控制層（ mac層）和無線鏈路控制層（ rlc層） ，其中，對rlc層進行了重點研究。
  19. And the pn code synchronization scheme adequate for the wcdma uplink is presented and combined with finger management, channel estimation and mrc algorithms to complete the rake receiver scheme. simulations on pd / pf and pd / ebno show the scheme has good preformance and meets the requirement of wcdma uplink in 3gpp protocols

    分別採用pd / pf方法和bler / ebno方法對同步方案進行模擬，模擬結果表明，本論文提出的擴頻碼同步方案的捕獲概率和虛警概率能滿足要求，同時總體接收機方案能達到3gpp協議中上行鏈路的性能要求。
  20. In fact, wcdma, as one of technique of 3g, becomes the most popular wireless transmission technique

    Wcdma作為3g技術之一，事實上已經成為3g應用范圍最廣、最為主流的無線傳輸技術。
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