<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[MarvinBower的专栏]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/MarvinBower</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; MarvinBower]]></copyright><item><title><![CDATA[USB CDC]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4754072</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4754072</guid><author>MarvinBower</author><pubDate>Sun, 01 Nov 2009 14:14:00 +0800</pubDate><description><![CDATA[ Ifyou require any connectivity solution for your device (USB, Bluetooth,WiFi, etc.), and would like free project consulting from Jungo please fill out this formUSB CDCOverviewThere ]]></description><category></category></item><item><title><![CDATA[Fractional Dedicated Physical Channel (F-DPCH)]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4513116</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4513116</guid><author>MarvinBower</author><pubDate>Wed, 02 Sep 2009 21:51:00 +0800</pubDate><description><![CDATA[F-DPCH]]></description><category></category></item><item><title><![CDATA[NDIS(Network Driver Interface Specifation)]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4471349</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4471349</guid><author>MarvinBower</author><pubDate>Fri, 21 Aug 2009 22:13:00 +0800</pubDate><description><![CDATA[NDIS (Network Driver Interface Specification) is a Windows specification for how communication protocol programs (such as TCP/IP) and network device driver should communicate with each other.  N]]></description><category></category></item><item><title><![CDATA[A look at PDP Context in UMTS networks By Zahid Ghadialy ]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4402598</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4402598</guid><author>MarvinBower</author><pubDate>Sun, 02 Aug 2009 23:09:00 +0800</pubDate><description><![CDATA[A look at PDP Context in UMTS networks<!--google_ad_client = "pub-4136234335250116";google_ad_width = 728;google_ad_height = 90;google_ad_format = "728x90_as";google_ad_type = "text_image"]]></description><category></category></item><item><title><![CDATA[扩频因子SF]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4348929</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4348929</guid><author>MarvinBower</author><pubDate>Tue, 14 Jul 2009 23:05:00 +0800</pubDate><description><![CDATA[所谓扩频因子：1、数据速率经过增加控制信息（如功率控制信息）、信道编码、交织、速率匹配，变成符号速率，符号速率×扩频因子＝码片速率我觉得符号速率就是码元速率。2、对于walsh码来说，同阶walsh码扩频因子相同，扩频因子数==该阶walsh码的数量==该阶扩频码的码片长度。3、低阶walsh码和其子码不能同时使用（不正交）。这就是384kbps和hsdpa等业务可]]></description><category></category></item><item><title><![CDATA[PC/SC Workgroup Specifications Overview]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4342978</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4342978</guid><author>MarvinBower</author><pubDate>Sun, 12 Jul 2009 23:35:00 +0800</pubDate><description><![CDATA[PC/SC Workgroup Specifications OverviewThe current release, Version 2.01.6 was released in May 2009. It incorporated changes to Part 10 to remove wLcdMaxCharacters and wLcdMaxLines fields from P]]></description><category></category></item><item><title><![CDATA[PCSC]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4342899</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4342899</guid><author>MarvinBower</author><pubDate>Sun, 12 Jul 2009 22:45:00 +0800</pubDate><description><![CDATA[Personal Card / Smart Card PCSCworkgroup.com CCID protocol(Integrated) Circuit(s) Cards Interface Devices are USB devices thatinterface with integrated circuit(s) cards (with contact]]></description><category></category></item><item><title><![CDATA[浅谈手机发射功率]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4339064</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4339064</guid><author>MarvinBower</author><pubDate>Fri, 10 Jul 2009 23:32:00 +0800</pubDate><description><![CDATA[浅谈手机发射功率 贴子发表于：2005/8/8 12:04:27 笔者从事手机测试校准系统集成有段时间，感觉到手机发射功率在不同的系统、不同的协议下有很多的不同。笔者对此深感有意思，故把PHS、GSM、cdma2000 1x、wcdma下对手机发射功率的规定罗列于此，希望能给同行起到抛砖引玉的作用，斧正我的错误。一、手机发射功率的两个方面　　手机发射功率]]></description><category></category></item><item><title><![CDATA[什么是OTA测试 ]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4339019</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4339019</guid><author>MarvinBower</author><pubDate>Fri, 10 Jul 2009 22:57:00 +0800</pubDate><description><![CDATA[什么是OTA测试 1.OTA 测试介绍       1.1 手机的无源测试和有源测试      当前在手机射频性能测试中越来越关注整机辐射性能的测试，这种辐射性能反映了手机的最终发射和接收性能。目前主要有两种方法对手机的辐射性能进行考察：一种是从天线的辐射性能进行判定，是目前较为传统的天线测试方法，称为无源测试；另一种是在特定微波暗室内，测试手机的辐射功率和接收灵敏度，称为有]]></description><category></category></item><item><title><![CDATA[接收灵敏度]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4339014</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4339014</guid><author>MarvinBower</author><pubDate>Fri, 10 Jul 2009 22:55:00 +0800</pubDate><description><![CDATA[接收灵敏度Rx 是接收（ Receive ）的简称。 无线电波的传输是“有去无回”的，当接收端的信号能量小于标称的接收灵敏度时，接收端将不会接收任何数据，也就是说接收灵敏度是接收端能够接收信号的最小门限。 接收灵敏度仍然用 dBm 表示，通常 WiFi 无线网络设备所标识的接收灵敏度（如 -83dBm) ，是指在 11Mbps 的速率下，误码率（ Bit Error Rate ）为 10 -5]]></description><category></category></item><item><title><![CDATA[关于dBm, dBi, dBd, dB, dBc, dBuV相关的解析 ]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4339009</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4339009</guid><author>MarvinBower</author><pubDate>Fri, 10 Jul 2009 22:51:00 +0800</pubDate><description><![CDATA[关于dBm, dBi, dBd, dB, dBc, dBuV相关的解析 概念辨析：dBm, dBi, dBd, dB, dBc, dBuV 1、 dBmdBm是一个考征功率绝对值的值，计算公式为：10lgP（功率值/1mw）。[例1] 如果发射功率P为1mw，折算为dBm后为0dBm。[例2] 对于40W的功率，按dBm单位进行折算后的值应为：10lg（40W/1m]]></description><category></category></item><item><title><![CDATA[接收灵敏度的定义公式]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4339003</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4339003</guid><author>MarvinBower</author><pubDate>Fri, 10 Jul 2009 22:44:00 +0800</pubDate><description><![CDATA[接收灵敏度的定义公式摘要：本应用笔记论述了扩频系统灵敏度的定义以及计算数字通信接收机灵敏度的方法。本文提供了接收机灵敏度方程的逐步推导过程，还包括具体数字的实例，以便验证其数学定义。 在扩频数字通信接收机中，链路的度量参数Eb/No(每比特能量与噪声功率谱密度的比值)与达到某预期接收机灵敏度所需的射频信号功率值的关系是从标准噪声系数F的定义中推导出来的。CDMA、W]]></description><category></category></item><item><title><![CDATA[接收灵敏度指标分析]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4338963</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4338963</guid><author>MarvinBower</author><pubDate>Fri, 10 Jul 2009 22:22:00 +0800</pubDate><description><![CDATA[接收灵敏度指标分析摘要：本文对接收机设计、测试一些会遇到的问题比如噪声系数对接收机灵敏度的影响；本振频率误差与接收机灵敏度的影响；接收机灵敏度的两种表达方法有何联系等进行了一些较为接近理论的分析。由于本人理论水平的限制一定会有很多理解不正确的地方，不当之处还请大家讨论。接收灵敏度是检验基站接收机接收微弱信号的能力，它是制约基站上行作用距离的决定性技术指标，也是]]></description><category></category></item><item><title><![CDATA[转自Linux桌面中文网 - 利用Ubuntu 8.10的usb-creator创建LiveUSB]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4329467</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4329467</guid><author>MarvinBower</author><pubDate>Tue, 07 Jul 2009 22:17:00 +0800</pubDate><description><![CDATA[利用Ubuntu 8.10的usb-creator创建LiveUSB2008-10-31 22:04 | 分类 安装配置 | By TualatriX Ubuntu 8.10发布第二天，我常用的两个源都挂掉了。真是又喜又悲。昨天介绍Ubuntu 8.10时有提到其中新增的创建USB启动盘的工具，今天试用了一番。 —–软件位于“系统”->“系统]]></description><category></category></item><item><title><![CDATA[Linux操作系统为何对计算机病毒免疫]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4326491</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4326491</guid><author>MarvinBower</author><pubDate>Mon, 06 Jul 2009 22:58:00 +0800</pubDate><description><![CDATA[Linux操作系统为何对计算机病毒免疫2007-10-20 Cbsi中国·PChome.net 类型: 转载 来源: Ccidnet 责编: 宋杰  可能不少人持这样一种观点，认为 Linux 病毒少是因为Linux不像Windows那么普及，其实这种观点很早已经被人批驳过了，一个最有力的论据是：如果写病毒的人写 Wind]]></description><category></category></item><item><title><![CDATA[介绍两款小巧的Linux发行版：Slax与DSL]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4326470</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4326470</guid><author>MarvinBower</author><pubDate>Mon, 06 Jul 2009 22:47:00 +0800</pubDate><description><![CDATA[介绍两款小巧的Linux发行版：Slax与DSL 发布时间：2007.08.24 06:33     来源：赛迪网    作者：heiyelurenLinux是可定制性非常强的操作系统，普通到PC机上的桌面Linux，服务器上的服务器端Linux，手机和工控机里的嵌入式L]]></description><category></category></item><item><title><![CDATA[Ubuntu LiveUSB]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4326456</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4326456</guid><author>MarvinBower</author><pubDate>Mon, 06 Jul 2009 22:40:00 +0800</pubDate><description><![CDATA[Ubuntu LiveUSB[ Screenshot | Download | Issues | Author ]This is a tool to create a bootable Live USB stick from the running Ubuntu Live CD.It was made in response to Ubuntu Brai]]></description><category></category></item><item><title><![CDATA[LiveCD]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4326438</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4326438</guid><author>MarvinBower</author><pubDate>Mon, 06 Jul 2009 22:29:00 +0800</pubDate><description><![CDATA[LiveCD　　很多 Linux? 发行版本已经被设计为所谓的“LiveCD”，即可以直接引导为可用 Linux 系统的 CD。与大多数广为应用的 发行版本中可以使用的“拯救模式（rescue mode）”引导选项相反，这些 LiveCD 的设计是，当从 CD 引导起来后，提供一整套 可以使用的工具，其中有一些是通用的，有一些是高度专用的。David Mertz 介绍了 Linux 市]]></description><category></category></item><item><title><![CDATA[3GPP UMTS Releases]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4314589</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4314589</guid><author>MarvinBower</author><pubDate>Wed, 01 Jul 2009 22:39:00 +0800</pubDate><description><![CDATA[ ReleasesThe evolution of UMTS progresses according to planned releases. Eachrelease is designed to introduce new features and improve upon existingones.[edit] Release 99Bea]]></description><category></category></item><item><title><![CDATA[UMTS]]></title><link>https://blog.youkuaiyun.com/MarvinBower/article/details/4314582</link><guid>https://blog.youkuaiyun.com/MarvinBower/article/details/4314582</guid><author>MarvinBower</author><pubDate>Wed, 01 Jul 2009 22:38:00 +0800</pubDate><description><![CDATA[Universal Mobile Telecommunications SystemFrom Wikipedia, the free encyclopedia  (Redirected from UMTS)Jump to: navigation, search"3GSM" redirects here. For the mobile exhibition, see ]]></description><category></category></item></channel></rss>