COST 2100

There are famous channel model COST203 258 273. Now, here comes the COST2100.

in reference to:

"Working Group 2 – Radio Channel"
- COST 2100 - Working Group 2 – Radio Channel (view on Google Sidewiki)

IST WINNER

I have said to my boss that WINNER project did a lot of good by open its achievements. All it conclusion documents are delieverable to the public.

And I added our 863 project in China give no result to public. Boss confirmed my view and comment that it is not good.

in reference to:

"WINNER+ - Public Deliverables"
- WINNER-2-Deliverables (view on Google Sidewiki)

Espion(s) (2009) - Movie

to watch

in reference to:

"Espion(s)"
- 天真间谍-09最新剧情爱情大片DVD中字 - 视频 - 优酷视频 - 在线观看 - 天真间谍 剧情 爱情 (view on Google Sidewiki)

The crash of the government

People are very discontent about the evil things done by government.

in reference to: 上海钓鱼事件洗冤录--南都周刊 (view on Google Sidewiki)

To hell

There will be one day those machines will betray us.

in reference to:

"盘旋在空中的上帝
2009-10-29 18:44:38　来源: 南都周刊　浏览量: 739　网友评论 0 条
明年，五角大楼购买无人驾驶飞机的数量将首次超过有人驾驶飞机，这也意味着一个距离更遥远、操作更抽象、作战更残酷的无人驾驶飞机时代即将来临。"
- 盘旋在空中的上帝--南都周刊 (view on Google Sidewiki)

Parse Radar Technology is used in Personal Wireless Communication

“研制了八阵元圆阵、八阵元、六阵元面阵等三类七个品种系列化智能天线产品，研制了智能天线波束控制系统、S参数自动化测试系统，为大规模批量生产提供了技术保证。2007年4月已研发出完全满足智能天线行业标准的产品。六阵元面阵智能天线、八阵元面阵智能天线均通过大唐移动通信有限公司、中兴通讯有限公司组织的产品性能测试。” from http://hudong.wlstock.com/StockBar/d5727451.aspx

in reference to:

"The 8 x 8 antenna operates in the frequency range 4.4-5 GHz. Each radiating element is connected to an independently controlled analog phase shifter, thus allowing a continuous steering of the main beam both in elevation and in azimuth. The whole antenna is realized in printed technology, and all the RF and biasing circuitry is realized on a single layer, while the radiating part is realized by an array of cavity-backed slot-fed patches, thus resulting in an extremely compact and modular solution. Preliminary measurements show the good performance achievable and confirm the beam-shaping and interference-nulling capabilities of the presented antenna system."
- Welcome to IEEE Xplore 2.0: A 2-D electronic beam steering phased array for point-multipoint communication applications (view on Google Sidewiki)

60GHz

高门槛啊。有能力作器件才行。

in reference to:

"The challenges
A world of possibilities, but also a world of technological challenges arises with the 60GHz band. First of all, such a huge carrier frequency—an order of magnitude higher than current standards—imposes a lot of hazards to the analog and antenna designers.

Moreover, when you aim at developing single-chip 60GHz radios, using silicon CMOS technology, the technological challenge is even greater. The 45nm technology node for CMOS is required to realize these radios but only research centers have ready access to these advanced technology nodes can get insight into the analog characteristics of the 45nm transistors.

A second challenge is the huge bandwidth of 7GHz at which the 60GHz radios have to work (from 57 to 64GHz). This means the operating frequencies can vary about 15% as compared to only 3% for Wi-Fi (from 2.4 to 2.485). This is especially hard for the front-end, synthesizer and antenna design.

Thirdly, the analog-to-digital converters and digital-to-analog converters have to operate at a high sample rate of about 4Gsamples/sec at a resolution of 5 to 6 bit. Such characteristics are difficult to realize in CMOS, especially with reasonable power consumption. This high sample rate is also challenging for the digital processing unit of the radio. Several good ultra-low-power ADCs were presented at ISSCC2008.

A fourth problem with 60GHz radios is the low signal to noise ratio (SNR). The reason for this is twofold: the high carrier frequency implies a low receive power; and, a high bandwidth (2GHz for 60GHz communication) contributes to a high noise level at the receiver side; hence, the system works at low SNR.

To circumvent this phenomenon, beam-forming techniques both at the receiver and transmitter sides are applied for 60GHz communications. Intelligent beam forming is achieved by using multiple antenna paths combined with programmable phase shifters.

For very demanding applications in terms of data rate, larger antenna arrays are needed. Another consideration is that beam forming is more important for plugged applications (e.g. wireless HDMI) than for nomadic applications (video kiosk) since in the latter case, part of the problem can be solved by bringing the portable device closer to the video kiosk.

And finally, the fifth challenge with 60GHz communications is that designers have to be aware of the fact that the standard will incorporate three physical (PHY) layers: one single-carrier modulation with frequency domain equalization (SC-FDE) and two OFDM variants."
- 60GHz: Achieving the ultimate wireless dream | Wireless Net DesignLine (view on Google Sidewiki)

Analog Steering for extreme large antenna number case

When antenna number goes large, digital steering is costly. The practical method is to use analog one.

I have predicted it long ago.

in reference to:

"Unique (patents pending) analog beam steering electronics allow the Beam transceiver to simplify and eliminate costly baseband processing leading to an overall lower wireless solution cost. This analog beam steering approach is independent of any particular baseband standard (ex. WiGig, IEEE WPAN, etc.) allowing support for multiple existing or future standards."
- beamnetworks - Technology (view on Google Sidewiki)

60GHz vs UWB

60Ghz with IEEE 802.15.3c is the future. UWB is gone.

in reference to:

"然而，随着WiMedia联盟瓦解；一夕之间，迈向Gb/s级无线技术的道路似乎不再明朗。所有目光也旋即转向了60GHz技术。"
- 解放60GHz，无线市场将迎来巨大变化 (view on Google Sidewiki)

GPS Snitch

The design is simple, however, due to low integration density, the volume of product is too large.

Cinterion's MC56 and Navman's Jupiter 30 are both very popular stuff.

in reference to: GPS Snitch实时目标追踪的奥秘 (view on Google Sidewiki)

Standardization of Ultra-bandwidth Communication

UWB本来将通过IEEE802.15 WG进行其标准化工作，各方在IEEE通过PAR，即15.3a TG的成立许可。但究竟是使用Multi-Band OFDM还是DS UWB让各参与者渐行渐远。

一方是Multi-Band OFDM的支持者，组成了WiMedia[http://www.wimedia.org/]联盟，将近乎完整的规范已提案
[http://www.wimedia.org/imwp/idms/popups /pop_download.asp?ContentID=6516]的形式投给了IEEE802.15.3a。WiMedia的主要支持者是TI、 Intel这样的老牌芯片厂商，同时也有很多初创的小企业。

另一方则是DS UWB的支持者，组成了UWB Forum，开始与WiMedia竞争。主要players是Motorola，Freescale。Freescale也是有备而来，准备使用其的 110Mbit/s技术，以推广其XS110芯片组。其实很多学术界的人都是支持直序或脉冲方式的高速通信的，UFL的Dongliang Duan的老板就是做脉冲的。个人分析，因为大家觉得最初的无线通信方式（马可尼的电报系统）就是脉冲方式的，在使用波形调制这么多年后，从哲学的角度来说，技术是该进行一次轮回的。当然，脉冲方式是有很多实质性好处的，应该较MB-OFDM简单，使得成本更低。代价是，在这个满是波形调制的现有社会中，要使用脉冲而不让干扰波及到现有系统，是很困难的。

在IEEE Member Voting中，双方势均力敌，不可开交。于是双方决定放弃在IEEE的标准化路程，通过走向市场的de facto事实标准来竞争，让用户来决定谁是赢家。另一方面，缺少一致也被认为是技术和市场均还未成熟，进行标准化尚早，也支持了15.3a的流产。

按传闻[http://www.handheld.eet-china.com /ART_8800414008_4000001_NT_4072ae1d.HTM]，2006年4月，Freescale计划退出UWB Forum，主要厌倦了游说工作，认为太多肮脏政治超过了技术本身。Motorola是Freescale的兄长，自然也是保持一致地推出了。这样，UWB Forum元气大伤，只剩Pulse-Link高举大旗死扛。按照Wikipedia的描述，如今的UWB Forum已名存实亡。不过有趣的是当年MultiBand OFDM Alliance Special Interest Group (MBOA-SIG)的域名[multibandofdm.org]也已易主。

WiMedia则一番风顺，其输出标准于2005年被ECMA（欧洲计算机制造商协会）采纳为规范，ECMA-368[http://www.ecma- international.org/publications/standards/Ecma-368.htm]和ECMA-369[http: //www.ecma-international.org/publications/standards/Ecma-369.htm]。

ETSI（欧洲通信标准学会）采纳了ECMA的规范。

2007年ISO（国际标准组织）也采纳了ECMA的规范，作为ISO/IEC 26907:2007和ISO/IEC 26908:2007[http://standards.iso.org/ittf/PubliclyAvailableStandards /index.html]。

2009年1月，WiMedia宣称中国信产部已批准MB-OFDM在中国的使用并准许其使用频谱。不过中国未必安心使用国外标准，众多国内芯片企业虎视眈眈。至少在DVB领域，中国就算是抄，也得抄出个自己的标准来。不过在DVB时代，中国是采纳了南北两套技术的。实验室邻座的小弟在徒手研究UWB信道建模，老板也开始过问起UWB标准，不知道是否是UWB中国大雨前的乌云。

WiMedia的思路倒是很先进的，同IEEE802.16的Service-Specific Convergent Sub-Layer一样，WiMedia在上层支持多种payload的承载，自身以负责PHY传输技术为主，这样厂商甚至可以在WiMedia上架设私有的MAC协议。WiMedia的2008版也将Interference Avoidance纳入其设计考虑，这样在世界各地频谱使用不同的情况下推广要容易得多。

这些相似的重要战略步伐当然还是因为他们背后是同一批 Sophisticated 的棋手。

我们这帮做无线的就等着啥时候自己在家看电视时只用接电源线就了事，忽略信号线的时代了!

in reference to: WiMedia Alliance - Wikipedia, the free encyclopedia (view on Google Sidewiki)

802.11 Wifi with Open Source MAC

It is important for customization and field simulation.
Industrial implementation.
Lab.
with linux driver source code and documents

in reference to:

"the official Linux Wireless wiki"
- Welcome - Linux Wireless (view on Google Sidewiki)

Learn from mistakes

I won't be a gambler.

in reference to:

"The gamblers displayed normal verbal and memory skills but had difficulty solving problems and took longer than average to learn from their mistakes or look for alternative solutions."
- Gallery: Science Confirms the Obvious! | Popular Science (view on Google Sidewiki)

Sidewiki有明天吗?

真是不懂，Sina开micro blog没事，为啥要把twitter封了。全世界人都用，难道其他国家的人都是傻子。。。

Google Side wiki不久估计也就是和Diigo Bookmark一样的命运，被墙x。

更何况产品敢命名为x-wiki，就是一大敏感词~

哎，一声叹息~

in reference to: 新浪首页 (view on Google Sidewiki)

He is not here

Another non-native Chinese won the Nobel Prize in physics!

in reference to: Technology Review: Nobel for Revolutionary Optical Technologies (view on Google Sidewiki)

保护行人的汽车

Diigo被封，只有投向Google做Bookmark了。

小时候就有这个想法，甚至是在车外装气囊，现在终于成现实了~

in reference to: 汽车如何保护行人--南都周刊 (view on Google Sidewiki)

人类的自由是不可能被限制的

我们超越了重力，却被禁锢与自己狭小的控制欲，我们甚至没有和平的勇气，贪婪让我们屠杀同类，甚至不惜种族的灭亡，何时一个类属会宽容其他的类属乃至自己的同类，而又能不失进取。
当历史来评判树墙的行为时，长城从建筑学、组织学的角度看来，是一个奇迹。但对于中华文化的发展来说，真的是进步吗，它防备了外敌，但更多地也阻碍了人们的交流，成为了地域的疆界，政治的疆界。
未来的我们对GFW的评判将是，GFW一定是和秦始皇焚书这一行为一般被人唾弃。

墙是如此地有趣，我可以发这篇Blog，但是或许我在很长一段时间里将被墙挡在我，以至于我本人都看不到它。

in reference to:

"翻墙，突破各类限制的尝试
2009-7-3 12:01:01　来源: 南都周刊　浏览量: 35486　网友评论 36 条
设了一百道墙，网民们也不会像文章开头说的那两位，会重新翻回去。看看目前翻墙软件的热闹，应该能了解，许多人正在翻得不亦乐乎呢。



文·目林寺

 
词汇释义：
 
　　原指爬过越过围墙之类的肢体行为。现指通过各种代理服务器，突破限制，浏览或登录某些网站。网站整顿开始，尤其绿坝出来以后，该名词被网民不断使用，而被应用的软件则称为“翻墙软件”。其实，广义来说，所有试图突破限制的行为都可以称作“翻墙”。

　　例句：昨晚翻墙去网吧，到了网吧，我又翻墙才看到自己喜欢的网站。
 
　　医院为防止病人出逃外设100道，两精神病患者仍欲逃出医院。

　　于是，等到夜黑时刻，两人开始努力翻墙。至第30道墙下，“累了么？”“不累。”于是二人继续向外翻。至第60道墙下，“你累了么？”“不累。”于是二人继续向外翻，至第90道墙下，“你累了么？ ”“累了。”“那好，我们翻回去吧。” 于是，他们又吭哧吭哧往回翻。

　　虽然是精神病患者，虽然最后没能成功，但这二位却体现着和所有人相通的点，那就是希望逃脱禁锢，向往墙外的自由自在。

　　墙很多，无论是为了保障自身安全的墙，还是用于禁闭他人的墙，其基本功能是一样的，既是用于隔离。将一个空间和另一个空间隔离，使得人们无法在两处自由地来回。

　　但人类追求自在的本性是与生俱来的。所以，自从有了墙这种形态，也就有了翻墙这种行为。翻越城墙进攻敌人，翻越院墙偷取财物，翻墙脱身，翻墙私会等等。也就是说，只要有人筑墙，必然有人翻墙，只要有人设置限制，就必然有人会去尝试突破。其实，广义来说，所有试图突破各种限制的行为都是一种翻墙行为。

　　以前在学校的时候，我们经常“翻墙”去外面的小酒馆畅谈或是痛哭，以前校内的网络无法访问国外网站，我们就利用各种代理服务器“翻墙”达到自己的目的。前一个墙，翻越的是具体的用石头水泥砌的固体，后面那个要翻的则是网络上所设置的访问限制。

　　自从去年网络开始整顿以来，许多网站因为自身内容的缘故，无法正常登录。关于翻墙的言论就开始在网络世界里满天飞，求翻墙软件的帖子到处都是，而在朋友之间也会开始互相推荐各类翻墙软件。这些使用翻墙软件的人们，正是试图使用代理访问的方式去浏览自己想看而又被屏蔽的网站。

　　这些网站可能低俗，可能有不良内容。无论如何，屏蔽并没能完全阻止部分固执的网民。设定的限制只会促使他们用类似宵小的方式去达到自己的目的。

　　最近，绿坝又被提上日程，据说会限制更多的不良网站浏览。等于又是给网民设置了多道墙，或许初衷是好的，或许保护了部分没有分辨能力的人。但是，有的墙真的就是用来翻越的，限制越多，人们翻越的欲望就越强。

　　设了一百道墙，网民们也不会像文章开头说的那两位，会重新翻回去。看看目前翻墙软件的热闹，应该能了解，许多人正在翻得不亦乐乎呢。"
- 翻墙，突破各类限制的尝试--南都周刊 (view on Google Sidewiki)

[Movie] the world after human

The world after human. The soul of few elites are preserved, and so is the machines who turn against us. Be brave in the dark. The dark deep in human will destroy us so we have to challenge ourselves to exceed our limits and to postpone our extinct. The limits that the nature designated to us failed to enable our further evolution and will make us all die. However, few of us has the great spirit that is far exceeding the dark, it makes us help each other and even sacrifice ourselves to save the whole, the bright future.

in reference to: 9 (2009/I) (view on Google Sidewiki)

We are not yet aware of the environment problem

"What is sacrifice, we keep saying we want to change, but we keep doing the same shit thing everyday. And that is not justification for what my father did. what he try to do. But I want people to know that he really did believe he is helping us and he sacrifice everything including himself. I used to believe people could not change, That all we could do is just to have much fun as we could as we come to the end. But now, I don't want to end."

The fact is you have to know how to deal with flocks to let them understand what you know. They do thing in their way because they probably do not know the consequence, the environmental consequence. The physical world is so physical that every single destruction counts, while our human world is so subjective that we just ignore every piece of facts.

http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=dawson+city,+yukon&sll=30.593168,114.305361&sspn=0.838124,1.759186&ie=UTF8&hq=&hnear=Dawson,+Yukon,+Yukon+Territory,+Canada&ll=64.042839,-139.416794&spn=59.831014,225.175781&t=h&z=3

in reference to: The Thaw (2009) (view on Google Sidewiki)

Do we have to show off military weapons on national celebration day?

China is so wrong on showing off its military force on nation's anniversary day. Decades ago we did this for ambitions that we are not afraid of any invaders. But now, we are strong enough and it is no longer necessary. I hope Chinese won't play this way in next decade.


Obviously, the author has never been to China and just imagined it is a highly militarised country. And it is clear he has no idea about China's history. Even Kuomingtang affirms Taiwan and China mainland are parts of one single country.

It is quite right that Chinese government treats Han and other ethnic people unfairly, since it give more right to the minor ethnic people.

"It is a rigid, highly militarised and intensely nationalistic empire, in which 1.2 billion Han Chinese dominate dozens of other ethnic groups, by force if necessary."

Read more: http://www.dailymail.co.uk/news/worldnews/article-1217310/Marching-world-domination-China-celebrates-60-years-communism-display-military-worry-West.html#ixzz0SllctDPd

But American consumes much more energy than Chinese and will use up the energy all over the world. Chinese is just using the energy for basic needs while American use it for luxury life. You will know about it if you have been to these two countries.


"In the ports of East Africa, Chinese cargo ships are loaded every day with oil, timber and diamonds."

Read more: http://www.dailymail.co.uk/news/worldnews/article-1217310/Marching-world-domination-China-celebrates-60-years-communism-display-military-worry-West.html#ixzz0SlockSOZ

The western world, including Britain and US have been doing such dirty military deal for decades.

"For in return, the Chinese are selling African leaders the assault rifles, warplanes and mortars they need for their bloody wars of conquest and ethnic cleansing."

Read more: http://www.dailymail.co.uk/news/worldnews/article-1217310/Marching-world-domination-China-celebrates-60-years-communism-display-military-worry-West.html#ixzz0SlpSLiTA

in reference to: Marching to world domination: China celebrates 60 years of communism with a display of military might that should worry the West | Mail Online (view on Google Sidewiki)