CMMB手机电视业务运营管理系统建设方案

CMMB手机电视业务是一种通过CMMB广播网络传送电视节目信号、通过带有CMMB接收模块的手机终端收看电视节目和其它数据广播的业务。该业务具有节目传送成本低、收看质量好的优点，具有广阔的发展前景，是手机终端上极具吸引力的重要亮点业务。     

Fastrax发布UC430模块

Fastrax日前发布最新的全球卫星导航定位模块UC430,该模块将高性能的GPS接收芯片和CHIP天线集成在一个很小的封装内,尺寸仅9.6×14.0×1.95mm,此低功耗的GPS接收模块非常适合手提电脑、数字照相机、手机、资产跟踪设备、及其他功耗和尺寸要求非常严格的应用。     

基于广播方式的手机电视

电视在20世纪的出现极大地改变了人们的生活方式,并真正成为人们生活的一部分.而手机电视作为电视到个人的延伸,它将以其便捷性、移动性,使电视服务真正到达个人,它的出现必将带来新的革命. 基于广播方式的手机电视是指在移动终端上加载移动数字电视的接收模块,使移动终端能够接收广播数字电视节目(音频和视频内容).手机电视有两种业务形式:一种是通过广播网络单向下行信道向手持终端进行多媒体广播和信息发布的单向广播形式;一种是结合移动通信网络的上行信道的双向互动业务形式.     

手机电视终端基带芯片设计分析

文章首先介绍了国内外手机电视标准，然后探讨了手机电视终端基带芯片的设计，对手机电视终端基带芯片的关键技术进行了分析，最后介绍了手机电视终端芯片的技术发展趋势。     

手机电视及产业发展

手机电视又称移动数字多媒体广播，是指通过无线传输方式，利用七寸以下小屏幕、小尺寸、移动便携的手持终端（如手机、PDA、笔记本电脑等接收设备），随时随地接收电视节目和信息服务等业务的系统。     

手机电视技术的标准及发展趋势分析

1 引言 手机电视将移动的便捷与电视的娱乐集成到一起，是行业融合、应用融合的产物。随着移动通信技术和数字电视标准的发展以及手机性能的提高，手机电视业务从标准化、芯片、手机、网络到运营模式逐步发展成熟，引起了人们的广泛关注，被认为是移动业务新的增长点。在前不久召开的3GSM大会上,     

有条件接收系统的终端控制软件设计

随着有线广播电视网络技术的发展，数字有线电视已其高质量，多业务的特点逐渐替代传统的模拟电视。业务的实现不仅需要前端和网络的配合，还需要终端用户设备的支持。本文介绍一种有条件接收系统接收的终端控制软件设计技术。文中首先介绍了有条件接收终端系统的基本原理和系统构成，接着介绍了接收终端控制软件的CA进程、SI监控和CA滤波等模块的原理和实现方法，最后给出了研究的结果，并对其进行了讨论。     

手机电视,到底离我们有多远

手机电视是什么目前,手机电视业务的实现方式主要有三种。第一是利用蜂窝移动网络实现,如美国的Sprint、我国的中国移动和中国联通公司已经利用这种方式推出了手机电视业务。第二是利用卫星广播的方式,韩国的运营商计划采用这种方式。第三是在手机中安装数字电视的接收模块,直接接收数字电视信号。     

低功耗模拟前端电路设计

超低功耗、高集成的模拟前端芯片MAX5865是针对便携式通信设备(例如手机、PDA、WLAN以及3G无线终端)而设计的，芯片内部集成了双路8位接收ADC和双路10位发送DAC，可在40Msps转换速率下提供超低功耗与更高的动态性能。芯片中的ADC模拟输入放大器为全差分结构，可以接受IVp-p满量程信号。     

电信、广电下注TD手机电视标准奥运是粘合剂

一位业内人士表示，无论哪种手机电视标准，在技术层面都已经成熟，关键在终端设备和收费体制。目前北京和上海已经实现了移动数字电视信号的覆盖，两个城市的公交车所接收的就是DAB-H移动数字信号。尽管数字手机电视也具备了应用条件，但是和车载移动电视大尺寸终端和充足的车载电源相比，尺寸不及车载电视1／10的手机，在芯片的大小和耗电量上都有着严格的要求，这正是移动手机电视的难点。     

手机电视标准应用与运营模式探讨

随着我国数字电视地面传输标准DMB-TH的出台，手机电视标准亦成为业界研究讨论的热点。针对目前国际上比较成熟的几种手机电视解决方案，包括欧洲的DVB-H、韩国的T-DMB以及我国自主产权的DMB-TH和STiMi，从系统架构、核心技术和节约功耗技术的层面一一作了介绍，对总局大力支持的多媒体广播技术STiMi予以了充分的认同。同时，对我国手机电视的运营模式作了简要的分析和展望。     

MHL在电视机上的电路实现方法

如何配合移动设备上的MHL接口,在电视机上实现简单方便的MHL连接是研究的主要内容。着重介绍了无需MHL适配器的电路实现方案,对其中关键的电视主处理芯片的内部框图、MHL-HDMI连接线、MHL检测电路和充电电路以及PCB的设计方法都进行了细致分析。     

SRAM供电结构与SOC芯片供电网络设计优化

主要提出了一种优化SRAM供电结构的方案——裸露Metal4的SRAM供电网络。该方案可以在不增加使用绕线资源的条件下,显著地提升SRAM的供电以及整个芯片供电网络的性能。以一款数字电视解调芯片BTV2020为例,详细叙述了传统SRAM的供电结构,提出一种SRAM的供电结构及实现方法,以及对比了优化后的SRAM供电结构与传统SRAM供电结构,所构建的供电网络的最差电源电压降。最后通过流片结果证明本方案是有效可行的。     

Effect of a policy intervention on handset subsidies on the intention to change handsets and households’ expenses in mobile telecommunications

This study examined effect of a policy intervention that provides an upper limit for handset subsidies on users’ intention to change handset and households’ expenses on mobile telecommunications. The Korean government has prohibited mobile network providers from providing excessive subsidies for mobile handsets to attract subscribers since Nov. 2014 according to the mobile act. Using the exogenous variation, we estimate the impact of the policy on the intention to change handsets and expenses on handset installment, total mobile communications, and online content. The longitudinal data are from the 2014 to 2015 waves of the Korea Media Panel Survey. The mobile act lowered the predicted probability of switching handsets by 0.4% points. Moreover, the mobile act increased the predicted probability of any expense on handset installment by 7.5% points and had a significant impact on the amount of expenses on handset installment, with an increase of 7.8%. The mobile act lowered users’ willingness to switch handsets and increased spending on handset installment. This increased burden in handset installment might shrink the online content market, which has a large need for government support, as well as decrease consumers’ welfare. We assert that the policy intervention on handset subsidies is questionable with regard to both consumer welfare and the healthiness of the ICT ecosystem.     

Broadband multilayer ceramic chip antenna for handsets

A novel broadband and small multilayer ceramic chip antenna has been designed and investigated. The proposed antenna has a small size of 14×2.4×1 mm³. A wide bandwidth of 33% (VSWR<2.0) has been obtained, and the measured antenna gain has an average value of ~1.2 dBi. These characteristics make the proposed antenna applicable to future mobile handsets     

CMMB手机电视方案设计

随着技术不断发展,CMMB已成为了手机上基本功能.介绍了CMMB手机电视系统设计,以及如何在MTK平台上实现该方案,其中基带处理芯片采用MT6515,手机电视芯片采用SMS2186.同时,介绍了SMS2186芯片功能和外围电路硬件设计,并简要分析了CMMB软件设计以及相关业务流程.     

In-network performance of handheld mobile terminals

This paper considers a realistic evaluation of the power mobile handsets are able to transmit and receive. It has been suggested to use the so-called total radiated power (TRP) and the total isotropic sensitivity (TIS) for the uplink and downlink, respectively, which may be seen as special cases of the general mean-effective-gain (MEG) measure. These measures are computed from the spherical radiation pattern of the handset and the different measures are obtained by using different models of the mobile propagation environment. In this paper, the results obtained via the spherical radiation patterns are compared with the equivalent performance obtained in a live Global System for Mobile Communications (GSM) network using data from the Abis network interface. This method does not require altering of the handsets and the testing uses normal calls in the network. The investigation is based on measurements with four different commercially available handsets carried out in two different indoor environments and involving 22 test users. In addition, a series of measurements were also made with a phantom simulating the handset user, allowing a test of how well the phantom represents the average user.     

Baseband analog front-end and digital back-end for reconfigurable multi-standard terminals

Multimedia applications are driving wireless network operators to add high-speed data services such as EDGE (E-GPRS), WCDMA (UMTS) and WLAN (IEEE 802.11a,b,g) to the existing network. This creates the need for multi-mode cellular handsets that support a wide range of communication standards, each with a different RF frequency, signal bandwidth, modulation scheme, etc. This in turn generates several design challenges for the analog and digital building blocks of the physical layer. In addition to the above mentioned protocols, mobile devices often include Bluetooth, GPS, FM-radio and TV services that can work concurrently with data and voice communication. Multi-mode, multi-band, and multi-standard mobile terminals must satisfy all these different requirements. Sharing and/or switching transceiver building blocks in these handsets is mandatory in order to extend battery life and/or to reduce cost. Only adaptive circuits that are able to reconfigure themselves within the handover time can meet the design requirements of a single receiver or transmitter covering all the different standards while ensuring seamless inter-operability. This paper presents analog and digital base-band circuits that are able to support GSM (with EDGE), WCDMA (UMTS), WLAN and Bluetooth using reconfigurable building blocks. The blocks can trade off power consumption for performance on the fly, depending on the standard to be supported and the required QoS (Quality of Service) level.     

基于IF303的CMMB移动数字电视接收终端方案设计

为真正实现移动多媒体的交互业务,基于对CMMB网络结构的分析,提出了一种应用于CMMB的手持数字移动电视接收终端的设计方案。该方案以创毅视讯IF303芯片作为核心,给出了软件和硬件的模块结构框图和功能设计。实践证明,基于本方案设计的CMMB终端能够完成数字移动电视的视频、音频解码,达到良好的播放效果。     

基于TMS320DM320的移动数字电视设计

介绍了基于T-DMB标准和TI数字多媒体芯片的移动数字电视的软、硬件设计理论和方法.仿真结果表明该方案功耗低,灵敏度高,可实时播放.