【中文摘要】 介绍了WCDMA(宽带码分多址)增强型无线技术———HSDPA(高速下行分组接入)技术,详细讨论了其关键技术:AMC(自适应调制和编码)技术、HARQ(混合自动重传请求)技术以及快速调度和MIMO(多天线发射多天线接受)。并在此基础上,就HSDPA在WCDMA系统中的实现进行了较为深入的研究。
【英文摘要】 The technology HSDA in the WCDMA system is introduced.The background of the HSDA is covered and the core technology of HSDA is focused: AMC,HARQ,fast scheduling and MIMO.Based on these discussions the implementation of HSDA in the WCDMA system is discussed.
【中文摘要】 3G有多种组网方式,其中MSTP组网方式是目前最优化的。利用MSTP平台组建3G传输网的优势在于其具有多业务处理及强大调度功能,同时具有组网保护能力和对TDM业务较强的支持能力。
【英文摘要】 MSTP is the most optimized one among all the network modes nowadays.This paper indicates that the advantage of the 3G-transmission network born of MSTP platform derives from its multi-process management and powerful dispatching capability as well as its protecting ability to the network and the powerful support ability to TDM service.
【中文摘要】 本文论述了通过GSM路测数据进行WCDMA覆盖估算原理及方法。
【英文摘要】 This paper mainly introduces the principle and method of WCDMA coverage estimating using GSM drive test data.
【中文摘要】 本文阐述了WCDMA无线网络规划的整体流程,并重点分析了WCDMA系统中容量与覆盖的关系及平衡二者的流程。
【英文摘要】 In this paper, the whole flow of WCDMA network's layout is expatiated. Then the relationship between capacity and coverage of WCDMA network is studied as the key point. Also the balance flow for the above two is presented.
【中文摘要】 本文介绍了WCDMAR4核心网网络容灾意义和两种常见的实现方式:双归属组网方案和Iu-Flex组网方案。对两种方式详细分析的基础上进行了对比分析,给出了选择研究网络容灾方案的建议。
【英文摘要】 This thesis introduces the meanings of backup of WCDMA's core network in R4 and two important solutions: dual homing and Iu-Flex. The two solutions are compared based on detailed analysis and the suggestion are offered.
【中文摘要】 3G网络牌照发放日益临近,从充分利用现有网络资源角度出发,GSM网络运营商宜采取GSM/WCDMA网络共基站建设。本文从3G网络规划的覆盖要求分析了3G/2G基站共站址的可行性;然后,对系统干扰进行了分析,得出隔离度要求并计算了隔离距离,给出了工程改造的隔离建议;最后,从机房和天面两个方面,对共基站配套改造建设进行了分析。
【英文摘要】 To fully use the resources of the existent networks, operators with GSM networks should construct 3G networks based on sharing station address. In this paper, we first analyze the availability of sharing station address according to the requirement of networks coverage. Then we analyze the interference between the GSM and WCDMA systems, and give the disturb distance for engineering requirement between the antennas of the two systems. Last we supply some suggestions on reconstruction the sharing equipments i...
【中文摘要】 根据TD-SCDMA和WCDMA的标准规范,从理论上分析了TD-SCDMA基站和WCDMA基站在同一地理区域共存或共站址时相互间的干扰,论述了FDD/TDD系统共存研究的方法,对FDD/TDD干扰产生的相对容量的损失进行了仿真,给出了工程实施的解决方法.
【英文摘要】 According to the standard specifications of TD-SCDMA and WCDMA,the mutual interference of the systems TD-SCDMA and WCDMA with each other was theoretically analyzed when the both system sites are located at a common geographical region or they use commonly a system site,the investigation methodology of FDD/TDD system coexistence was expounded,the relative capacity loss due to FDD/TDD interference was simulated,and the solution method for the engineering practice was given.
【中文摘要】 大城市WCDMA网络规划中的无线覆盖是全网建设的关键之一,技术方案的选取直接关系到网络建成以后的通信质量。在大城市的WCDMA无线网络覆盖设计方面值得探讨和研究的问题很多,本文主要从WCDMA无线网络工程建设的角度出发,比较深入讨论了WCDMA无线覆盖策略、基站覆盖能力、覆盖技术手段、如何解决覆盖问题的工程技术方案等方面的问题。
【英文摘要】 Wireless coverage plays a key role in WCDMA network designing of big cities, correlative technical schemes directly concern quality of networks afterwards. There are lots of problems which are worthy of being probed and researched in network designing, In the point of engineering this paper mainly discusses wireless coverage strategies、coverage capability 、coverage means、available technical schemes and so on.
【中文摘要】 根据WCDMA多信道复用、高速率业务以及终端系统在功耗,性能,体积等方面的一系列要求,提出了一种基于时隙(slot)调度信道编解码模块中各子处理单元的方案,可使整个模块资源配置更加优化,执行效率更高。考虑到DSP处理器和大规模FPGA各自突出的性能特点,本文采用DSP和FPGA协同处理来实现整个方案。
【英文摘要】 According to WCDMA multi- channels multiplexing,high data rate operation and the requirements of power loss,performance and size in terminal system, a slot- based scenariois proposed to manipulate sub- processing units in channel cod-ing/decoding module, by which the whole module resource con-figuration can be optimized and the higher operation efficiencycan be achieved. Considering the respective prominent perfor-mance characteristics of DSP and large- scale FPGA, they willbe cooperated to implement in the...
【中文摘要】 针对WCDMA系统中各种正交可变扩频码(OVSF码)的单码分配方案,提出一种混合分配(HA)算法.HA算法分为初始码树划分和OVSF码分配2个阶段.仿真结果表明,HA算法很好地克服了crowded-first算法公平性差和RDA算法呼损率高的缺点,既降低了整个系统的平均呼损率,又对各种业务不失公平性.HA算法不需要码字重分配,极大地降低了算法的复杂度,适用于实时系统共享区域的设置,可以很好地解决不同业务的业务量变化问题.共享区域的容量为系统资源的30%-40%,此时能得到最佳的呼损率.
【英文摘要】 A hybrid allocation (HA) algorithm, including two steps of initial partition of code tree and orthogonal variable-spreading-factor( OVSF) code allocation, is presented for wideband code division multiple access (WCDMA) system focusing on OVSF single-code allocation in this paper. Simulation results show that HA algorithm overcomes low fairness in crowded-first algorithm and high blocking probability in RDA algorithm. Computer simulations also show significant reduction in average blocking probability and ex...
【中文摘要】 本文提出了一种混合神经网络反向链路功率控制算法,其外环控制采用Adaline神经网络模型,以不同业务的目标误帧率为指标,实时检测链路的误码状况,调整SIR目标值.内环控制采用Hopfield神经网络模型,通过控制移动台的发射功率确保SIR达到该目标值.与固定步长功率控制算法相比,该算法提高了控制精度和系统的稳定性,能够获得更高的通信质量.仿真实验也验证了算法的有效性.
【英文摘要】 This paper presents an uplink power control algorithm using hybrid neural network techniques.Based on the FER target criteria and CRC detection of wireless channel in real time,the Adaline out-loop controller adjusts the target SIR according to the FER need.The Hopfield inner-loop controller adjusts the mobile transmit power in order to keep the received uplink signal to interference ratio at the SIR target.Comparing with the conventional fixed-step approaches,this algorithm enhances control accuracy,improv...