德国罗德与施瓦茨信息

R＆S推出了业界首台支持HSUPA测试的频谱仪；R＆SZVT8网络分析仪赢得“2006年度最佳测试仪器奖”；R＆SCMU200提供强的HSDPA测试功能；R＆S推出全面HSDPA和HSUPA解决方案。     

TD-HSUPA终端协议一致性测试研究

对TD－HSUPA（TD－SCDMA高速上行分组接入技术）空口协议栈进行简要介绍,并结合3GPP协议一致性测试规范对TD—HSUPA终端协议一致性测试进行详细的分析说明。     

TD-HSUPA性能与组网策略分析

鉴于HSUPA技术在TD网络中引入的重要性,文章从原理层面对TD-HSUPA的关键技术做了简要介绍,并重点结合TD-HSUPA技术在现网测试中的主要结论和典型问题,提出了TD-HSUPA在现网中的引入策略,以及HSUPA技术引入后现网的覆盖规划、容量规划、载波配置、时隙和码资源配置,最后对现网测试结论及典型问题进行了分析.     

R＆S推出业界首台支持HSUPA测试的频谱仪

近日,R＆S（德国罗德与施瓦茨）公司的频谱仪在业界率先实现支持HSUPA测试。R＆S在新的固件（版本V3．8x）扩展了选件FS-K73和FS-K74的功能,使之能支持HSUPA的码域分析测试。R＆S的FSQ、FSU和FSP都可以选配FS—K73／K74。原来已经配备FS-K73／K74通过升级固件版本就可以支持HSUPA。     

HSUPA和诺基亚的HSUPA演示系统介绍

HSUPA是继HSDPA后, WCDMA标准的又一次重要演进。本文首先介绍了什么是HSUPA,HSUPA 的技术特点,以及HSUPA和HSDPA 在技术上的比较,其次阐述了HSUPA 技术为WCDMA系统带来的好处。最后文章对诺基亚全球首个HSUPA演示系统的系统结构进行了简单介绍。     

TD-SCDMA上行增强技术的研究

为了支持互动多媒体等需要高速上行数据速率的业务,TD-SCDMA在Release 6中引入了高速上行分组接入(HSUPA)技术.鉴于目前WCDMA上行增强技术日趋成熟,而TD-SCDMA上行增强技术的研究才刚刚开始,本文详细阐述了适用于TD-SCDMA HSUPA的各项技术,并比较了TD-SCDMA HSUPA与WCDMA HSUPA的差异,最后对TD-SCDMA HSUPA的研究方向提出了一些建议.     

HSUPA和诺基亚的HSUPA演示系统

HSUPA是继HSDPA后，WCDMA标准的又一次重要演进。本文首先介绍了什么是HSUPA，HSUPA的技术特点，以及HSUPA和HSDPA在技术上的比较，其次阐述了HSUPA技术为WCDMA系统带来的好处，并对诺基亚全球首个HSUPA演示系统的系统结构进行了介绍。     

HSPA＋终端测试概述和方案介绍

为了提高下行和上行分组数据的速率和容量,目前已经在全球范围内大规模地部署UMTS高速下行分组接入（HSDPA）和高速上行分组接入（HSUPA）网络。在3GPP中,HSDPA作为R5引入,而HSUPA则作为3GPPR6一个非常重要的特性。HSDPA和HSUPA的结合就是HSPA（高速分组接入）。但是,即使引进HSPA,UMTS的演进也并没有到达其终点。罗德与施瓦茨中国有限公司周云所撰《HSPA＋终端测试概述和方案介绍》一文简要介绍了HSPA＋的主要技术特性及需求,重点介绍了罗德与施瓦茨HSPA＋测试解决方案。此解决方案在传统信号源SMx系列和频谱分析仪FSx系列的基础上,为客户提供从研发的协议栈验证、射频验证到生产测试的基于CMW500单机的测试解决方案,为HSPA＋芯片的整个研发量产过程提供了极高的一致性。     

TD-HSUPA技术及解决方案

介绍了TD—HSUPA的关键技术,对HSDPA和HSUPA的关键技术进行了分析和比较,给出了重邮信科的HSUPA实现方案。     

HSUPA技术实现及其应用分析

HSUPA作为继HSDPA后又一个增强的数据解决方案,在全球多媒体发展、视频监控以及移动VoIP升温的脚步声中,走入运营商的视野,受到业界的广泛关注。文章介绍了HSUPA的关键技术,详细分析了HSUPA的引入对网络带来的影响,对网络规划带来的影响。最后给出HSUPA的应用部署前景。     

GSM移动通信手机射频收发系统的设计与实现

提出了一种按照GSMPhase2 技术规范实现的GSM移动通信手机射频收发子系统的硬件方法。该系统采用了当今较为流行的DCR方案,并且支持GPRS应用,可工作在EGSM900和DCS1800双频段上。文中介绍了射频收发子系统的构成和基本原理,描述了系统设计实现的具体过程,为系统设计提供了必要的分析和计算。     

CMOS工艺射频功率放大器的实现与验证

射频功率放大器是无线设备的关键器件,GaAs工艺被广泛使用在射频功放的设计制造上。而CMOS工艺在生产成熟度和成本上有很大优势,主要关注用CMOS工艺来做射频功放的问题,介绍世界上第一颗量产的CMOS功放及其所使用的特殊技术。利用一款成熟的手机产品,替换这颗功放及外围器件,最后与原产品进行对比测试。     

WCDMA uplink capacity of high-altitude platforms (HAPs) macrocells with incorporated HSUPA service

The multiservice (voice, data, and high-speed uplink packet access (HSUPA)) uplink capacity and the interference statistics of high-altitude platforms wideband code-division multiple access macrocell are studied. The free-space propagation loss model with a log-normal shadowing is used in the analysis. It is concluded that the voice and data service are significantly affected by HSUPA users and that the macrocell capacity decreases dramatically when one of these users gets connected to it in the case that they share the same frequency band. Also, it is concluded that the capacity decrement is highly sensitive to the location of the HSUPA users. When the HSUPA users did not share the same frequency band with the voice and traditional data users, macrocell capacity will be 3 HSUPA users with a processing gain of 8 or 5.3 HSUPA users with a processing gain of 16.     

WCDMA Uplink Capacity of Highways Cigar-Shaped Microcells with Incorporated HSUPA Service

The multi-service (voice, data and HSUPA) uplink capacity and the interference statistics of the sectors of the cigar-shaped WCDMA microcell are studied using a model of 5 highway microcells. The two-slope propagation loss model with lognormal shadowing is used in the analysis. It is concluded that the voice and data service are significantly affected by HSUPA users and sector capacity decreases dramatically when one of these users gets connected to a given sector or to one next to it. Also it has been concluded that the capacity decrement is highly sensitive to the location of the HSUPA users. Thus, no more than one HSUPA with a process gain of 16 can be connected to a given base station. In this case, the HSUPA user should interrupt its transmission when it is near to the sector border. No more than one HSUPA user with a process gain of 8 is permitted in a given sector and the sector next to it. When the HSUPA user is at the sector border, its transmission should be disabled.     

A novel power-amplifier module for quad-band wireless handset applications

This paper presents a novel power-amplifier module (PAM) designed for GSM850-, GSM900 MHz, DCS1800- and PCS1900-MHz handset applications. The module combines an InGaP HBT power-amplifier integrated circuit, two integrated couplers, a dual-band logarithmic RF power detector/controller, and some additional passive components. The logarithmic RF power detector was implemented in the module to accomplish linear-in-decibel output power dependency. This allows the handset manufacturers to calibrate output power (Pout) at one or two points, with error as low as +/-0.3 dB, thus reducing test time in mass production. Due to higher accuracy, our novel design significantly reduces the power consumption during normal operation. Our design is the first to include two integrated directional couplers in a handset RF PAM. It significantly improves power control accuracy over load variations. In this paper, we show that the directivity of the integrated couplers is critical for establishing accurate power control over phase variations at high values of load mismatch. In addition, the presented module features fully integrated impedance matching at input and output ports with DC blocks. The entire module is plastic encapsulated on a 10 mm /spl times/ 10 mm laminate substrate. The module offers higher accuracy of Pout control, smaller size, lower bill-of-materials, and a shorter Pout calibration time to handset manufacturers. It is a very desirable RF PAM to handset designers because of its unique features. Under a low single supply voltage of 3.2 V, the PAM provides 35-dBm output power, 55% power-added efficiency (PAE) in the GSM900 band, and 33 dBm and 50% PAE in the DCS1800 band.     

基于TDD的HSUPA技术研究进展

高速上行分组接入（HSUPA）是3GPP标准化组织为进一步满足数据业务需求在TD-SCDMA UTRATDD R6版本中提出的一种新技术，描述了引入HSUPA后TD-SCDMA系统的演化，阐述了HSUPA中涉及的物理层混合自动请求重传（HARQ）、快速调度、自适应调制与编码等关键技术及其相应研究，最后讨论了HSUPA技术应用于TD-SCDMA的发展前景。     

2006FIFA世界杯——推动手机电视发展的机会

概述了在用户需求和市场竞争的推动以及盈利机会的吸引之下，手机电视业务逐渐成为全球性的热点业务。从运营商赛前手机电视部署行动以及比赛期间的一些实际效果，指出世界杯对手机电视的发展确实起到了催化剂的作用。分析世界杯同时也成为手机电视技术和业务的试验田。一方面，移动运营商利用这次赛事，广泛开展了手机电视技术的推广和试验，另一方面，运营商也通过手机电视业务的使用对消费者的需求、使用习惯以及对价格的承受能力进行了测试。     

WCDMA系统中HSUPA技术的研究

高速上行分组接入（HSUPA）是3GPP标准化组织在WCDMA UTRAN FDD R6版本中提出的一种新技术。文章介绍了WCDMA系统中HSUPA物理层协议结构,重点分析了物理层信道结构,最后讲述了HSUPA中的关键技术。     

WCDMA高速上行分组接入技术性能研究

在高速上行分组接入(HSUPA)中通过采用NodeB控制调度、结合软合并的混合自动重传请求(HARQ)、更短的传输时间同隔(TTI)等关键技术,可使用户设备(UE)能以尽可能高的功率传输HSUPA数据,在减少时延的基础上得到更大的系统上行吞吐量.系统级仿真结果表明这些关键技术的引入对WCDMA通信系统上行数据传输带来了性能的提高.文章认为由于调度器的变化,不同调度算法在HSUPA系统中的表现有很大差别,需要进一步根据WCDMA系统业务的特点,设计更适合分布式调度器的调度算法,以进一步提高系统性能.     

Analysis of the influence of the power control and discontinuoustransmission on RF exposure with GSM mobile phones

Biological studies and, in particular, epidemiological ones require the estimation of the RF exposure induced by a mobile phone. Due to the different techniques used by global system mobile (GSM) and digital communication system (DCS) such as power control and discontinuous transmission, the power emitted by a handset is largely variable. As these parameters depend on the environment and the network strategy, individual exposure level is difficult to evaluate a priori. An analysis of the relative influence of the main parameters is performed and a method of statistical analysis based on measurement is proposed to estimate and characterize the exposure level in an operating network. Using a test mobile system, the data stream between the mobile and the base station, and, in particular the power control level, has been recorded along routes in Paris and its vicinity. Statistical parameters such as mean value, standard deviation, level crossing rate, and average duration fading have been extracted from these data. These parameters, which characterize the RF exposure induced by a GSM handset in an operating network, have been applied to a generic handset to evaluate the characteristics of the power absorbed by specific biological tissues using the finite-difference time-domain (FDTD) method