scdma 中文意思是什麼
scdma
解釋
時分同步碼分多址-
Handover process between gprs and td - scdma for data users
系統間的切換過程 -
An overview of air interface technology of td - scdma rtt
的空間介面技術綜述 -
Research on mixed networking technology of td - scdma system
系統混合組網技術研究 -
Signalling analysis of uu interface in td - scdma network analyzer
介面的信令分析 -
Link budget of td - scdma wireless programming network
無線規劃網路中的鏈路預算 -
Research on modulation quality of td - scdma ue transmitter
終端發射調制質量指標的研究 -
Space - time spreading approach based on td - scdma systems
系統的空時擴譜技術 -
Repeat iterative adaptive algorithm for smart antennas in td - scdma systems
系統中智能天線的重復迭代自適應演算法 -
In regard to the development of commercial terminals, after the successful development of the first td - scdma cell phone in the world by datang mobile, amoi, hisense, bird, lenovo, cecw, holley, cyit, envada, dbtel, and samsung have all finished the development of their respective solution for commercial terminals ; nearly 20 terminals and data card products were developed, and more than 10 are being tested on networks
在商用終端的開發方面，繼大唐移動研製成功世界上第一臺td - scdma手機之後，夏新、海信、波導、聯想、 cecw 、華立、重郵、英華達、迪比特、三星等企業目前已完成了各自的商用終端解決方案，並開發出近20款終端及數據卡產品，其中已有10餘款產品進行了網路測試。 -
At first, the author generally introduce the basal conception and theory, then discuss the existed optimal criterion and adaptive beamforming algorithm. the research of smart antenna at present is usually about theory discussion, and the theory analyzing object is usually linear array antenna, but td - scdma adopt circinal array antenna
該部分先簡要介紹了智能天線的基本概念和原理，包括智能天線的工作原理、分類、主要功能、研究內容與發展動態；然後闡述了目前存在的智能天線最優權準則和自適應演算法及其存在的問題。 -
First, the structure of sdr and the physical - channel of td - scdma are expounded, then software and hardware models of the terminal receiver, which use the sdr structure of wideband and bandpass sampling in if ( intermediate frequency ), are put forward
首先對軟體無線電的組成結構和td - scdma物理通道進行了闡述，在此基礎上提出了基於寬帶中頻帶通采樣軟體無線電結構的td - scdma終端接收機的軟硬體模塊設計方案。 -
Presents an overall link level simulation of mobile terminal receiver structure with smart antenna for td - scdma and describes its building blocks. three smart antenna algorithms and four structures of sa - rake arc simulated and compared based on above model
搭建了td - scdma智能天線移動終端模擬平臺，通過雙天線系統移動端接收特性的數值模擬，對智能天線演算法和4種sa - rake處理結構進行分析。 -
The paper demonstrates the whole plan of the propagation model application software. with the delphi software, an application software including the function of the realtime calculating path loss value is compiled completely. the paper analyses the planning theory of the td - scdma network. its main aspects include the backbone of the network, the link budget report, the budget of the effective distance, the analyse of the link interference and the analyse of the system capacity
論證了td - scdma傳播模型應用軟體整體方案，利用delphi軟體編寫了具有校正功能和實時計算傳播衰耗值功能（與gps系統配合）的應用軟體。論文從理論的角度分析了td - scdma網路的規劃理論，主要從網路拓撲結構、上下行鏈路功率平衡預算報告、有效通信距離的估算、上下形鏈路干擾的分析和系統最大容量分析五個方面進行了論述。 -
Compared with the fdd system, td - scdma adopting tdd, has no need of symmetrical frequency bands for uplink and downlink, and enables flexible and convenient planning and use of increasingly scarce spectrum resources
與fdd系統相比， td - scdma採用時分雙工方式，上下行無需對稱頻段，可以見縫插針，靈活方便地規劃使用日益緊張的頻譜資源。 -
The demonstration proved that td - scdma 3g mobile communications technology was qualified for large - scale production and application
演示證明td scdma第三代移動通信技術可以大規模投入生產和應用 -
In this thesis, we introduce the smart antennas and mainly examine the performance enhancements that can be achieved by employing sa in scdma wireless access system. in the part of introduction of smart antennas, we discuss the switched - beam arrays realizing by mending butler network at first. then we compare the different beam forming algorithms in sa
在對兩大類智能天線系統的介紹中，本文首先討論了一種以改進的butler網路實現波束賦形的多波束切換系統，推導了該天線陣的饋電模型並給出了模擬結果；然後，本文對智能天線波束形成演算法進行了比較，總結了不同演算法的優缺點，並給出具有代表性的演算法描述與模擬。 -
Referring to the self - guard mechanism of g. 729, characteristics of rs coding and scdma channel, a scheme using rs ( 7, 5 ) coding with crc and block interleaving is put forward and its effectiveness is verified by both pesq algorithm and subjective test at the end of chapter 4
結合g . 729自身保護機制、縮短rs編碼和scdma通道的特點，提出了基於rs （ 7 ， 5 ）碼帶crc檢錯及幀內交織的保護方案。並在第四章末採用pesq演算法驗證了該保護方案的有效性。 -
Evm measurement algorithm for td - scdma ue conformance test based on iterative process
基於迭代的時分同步碼分多址系統終端誤差矢量值一致性測試演算法 -
Research on smart antenna mobile terminal of td - scdma
智能天線應用於衛星移動通信終端抗干擾 -
Among of them, wcdma is based on gsm in europe and cdma2000 is based on is - 95 cdma in north america, td - scdma is put forward by china
在我國，電信運營商為在未來的競爭中搶佔先機，在許多城市已建設3g試驗網。
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