James-Ran的个人空间

James-Ran的个人空间 http://www.cnttr.com/34443 欢迎来逛逛,聊聊技术,侃侃大山. 本人主要喜欢WCDMA/TD-SCDMA无线侧的技术，如果有何关于无线技术方面的问题，你可以给我留言，我们可以一起讨论，共同提高。 Copyright(C) James-Ran的个人空间 SupeSite/X-Space 2008-08-20 20:55:30 技术是个魔鬼？ http://www.cnttr.com/34443/viewspace_152170.html 刚才在看书，看到关于QoS的描述时突然想到些什么，随手写下了。

随着技术的发展，所提供的QoS(Quality of Service)的能力越来越强。而技术是人发明的东西，这样也反过来体现出人类的发展。

举个简单的例子：

以前我们用电话拨号上网，浏览一个...]]> blog James-Ran 2008-06-26 12:10:26 The time difference between PICH and PCH Block by James http://www.cnttr.com/34443/viewspace_150821.html
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shared with you

enjoy it!

James

]]> blog James-Ran 2008-06-02 19:31:18 警惕 3G副产品的威胁 http://www.cnttr.com/34443/viewspace_150820.html blogJames-Ran2008-06-02 19:27:02 汶川地震之无线通讯考虑 http://www.cnttr.com/34443/viewspace_149973.html 这次大地震，通讯的畅通变成了一个大问题。

我们都知道，民用通讯系统是根据在正常情况下而进行设计的。所以，对突发事件的通讯承载能力有一定的限制。

目前可用的无线通信技术包括集群系统，移动通信系统（GSM，CDMA)，卫星通信系统，当然也包括市话...]]> blog James-Ran 2008-05-17 11:18:53 How to define slot format for DL DPCH in FDD http://www.cnttr.com/34443/viewspace_149442.html
How to define the slot format for DL DPCH in FDD

Sharing with you

James

]]> blog James-Ran 2008-05-09 11:04:36 H100A demo showing in real site http://www.cnttr.com/34443/viewspace_149329.html

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Today I summarize what we get in a TDS indoor system by H100A.

As we image that our H100A can use to check the quality of indoor system. And at this time, we have a chance in real site to show the advantage of H100A.

The datas in thi...]]> blog James-Ran 2008-05-09 08:33:49 我的梦 http://www.cnttr.com/34443/viewspace_149328.html 昨晚做了个有趣的梦：

突然睡着了，醒来时已是几十年后，一切都发生了变化：故人已离去，空留不识人。

今早醒来后，只感觉有点淡淡的惆怅。

和浩瀚的宇宙相比，人的生命太短暂。要更加抓紧宝贵的时间了。

...]]> blog James-Ran 2008-05-09 07:56:46 RF switch and duplexer used in wireless system http://www.cnttr.com/34443/viewspace_146695.html
RF Switch and Duplexer

As we all konw, the RF switch is more cheaper than RF duplexer.

Thus, the reduced cost will be achieved by utilization of RF switch not duplexer.

Here, I just summarized for GSM,TD and WCDMA system.

Enjoy it! blog James-Ran 2008-04-02 17:43:49 The bandwidth of measurement report between GSM and TDS http://www.cnttr.com/34443/viewspace_146214.html
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In wireless system, one kind of handover is MAHO(Mobile Assistance Hand Over) which means network control mobile to report the situation on DL radio link.

As the improvement of micro electronic technology and DSP, the ability of computing o...]]> blog James-Ran 2008-03-27 11:16:28 Reference measurement channel for TD-SCDMA(R99) by James http://www.cnttr.com/34443/viewspace_146103.html
Reference measurement channel for TD-SCDMA(R99) by James_Page_14

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Reference measurement channel for TD-SCDMA(R99) by James_Page_13

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Reference measurement channel for TD-SCDMA(R99) by James_Page_12

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Reference measurement channel for TD-SCDMA(R99) by James_Page_11

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Reference measurement channel for TD-SCDMA(R99) by James_Page_10

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Reference measurement channel for TD-SCDMA(R99) by James_Page_09

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Reference measurement channel for TD-SCDMA(R99) by James_Page_08

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Reference measurement channel for TD-SCDMA(R99) by James_Page_07

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Reference measurement channel for TD-SCDMA(R99) by James_Page_06

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Reference measurement channel for TD-SCDMA(R99) by James_Page_05

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Reference measurement channel for TD-SCDMA(R99) by James_Page_04

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Reference measurement channel for TD-SCDMA(R99) by James_Page_03

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Reference measurement channel for TD-SCDMA(R99) by James_Page_02

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Reference measurement channel for TD-SCDMA(R99) by James_Page_01

Today, when I surf in bbs.cnttr.com. and some guy still ask the older queation-how about the TDS's capacity of one carrier.

Thus, I post the wroten slides on this topic.

Enjoy it.

James

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