S*******p 发帖数: 261 | 1 拜托,不是UWB(ultra-wide band),是UMB, ultra-mobile broadband.
graduate |
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h**a 发帖数: 5 | 2 我是做HARDWARE的,不知道做这几个方向那个更有市场前景。谢谢。 |
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z*****n 发帖数: 7639 | 3 wimax is not for short range... |
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r*****f 发帖数: 247 | 5 how about cognitive radio? |
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m****y 发帖数: 74 | 8 Never evaluate an emerging area by reading "books", --- books are compiled
by losers. Go read some journal and conference papers. |
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D*******a 发帖数: 3688 | 9 these "books" are just a bunch of journal papers stapled together |
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k***x 发帖数: 12 | 10 I vote for WiMax. Many company support it. |
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d*******m 发帖数: 12 | 11 as far as hardware is concerned, definitely WiMax wins. |
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N*****k 发帖数: 72 | 13 Some companies are working on low power WiFi from WPAN now. This will be an
interesting trend to watch. |
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a*******e 发帖数: 62 | 14 输入功率大概1mW 植入人体 植入深度 几个mm 希望可以在5米的范围内工作
(当然接收端天线可以选择大尺寸的 发送端由于植入人体一定要小尺寸)
频带选择 ism mics uwb(perfered)
thanks |
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w****j 发帖数: 237 | 15 几毫米的ISM 2.4GHz的天线基本上就是相当于RFID天线拉。虽然高频,但是几毫米还是
尺寸太小了,可以用magnetic coupling的,本质上不是远场天线。要不用铜线绕几个
圈就算拉,咔咔~~
UWB是指3~10GHz吗?这个做成几毫米基本没有可能吧,几十毫米还差不多~~喀喀
好像记得IEEE Spectrum 有过专门的植入人体的RFID介绍~~好像就是上一年的,可以看
看~~~ |
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r*****e 发帖数: 620 | 16 请教一下达人们,如果要开始做ultra wideband pulse radio的东东,
除了一般RF的设备比如高速的scope,spectrum analyzer, network analyzer
还需要什么别的必不可少或者比较贵重的玩意么? |
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D*******a 发帖数: 3688 | 19 当然可以,只是个人经验觉得这样的research没什么前途。通常都是第一个挖坑,头几
个灌水的比较爽。 |
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x***y 发帖数: 830 | 22 mobile这块broadband access我还是看好的,没有wifi,需要高速无线接入的场合很多,
不光是phone,还有laptop.
技术已经成熟了,现在的delimma是,先降价培养用户群还是先等用户群成长到足够多再
降价。
家用的高速PAN这块也会很快起来,应用需求在那里摆着,UWB或者802.11n,还很难说。
bubble不那么容易吹了,未必是坏事。wimax,算个反面典型。
整个wireless向传统制造业经营模式转型,是好事情,说明产业的成熟度。只不过不那
么容易忽悠钱了。 |
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a*******e 发帖数: 346 | 25 大家默哀
articleID=212000285&cid=RSSfeed_eetimes_semiRSS |
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z******a 发帖数: 582 | 27 怎么就死掉了,好像没出多久啊。LZ做的是这个领域吗? |
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m****y 发帖数: 74 | 28 what a joke! is intel == whole industry? |
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s******u 发帖数: 50 | 29 GOD.....I had thought it a nice field |
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a****l 发帖数: 8211 | 30 you will never see a report that an "industry" died. An industry does not
die at any time, since industry is a collective name. |
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h******r 发帖数: 71 | 31 clock sync and channel training are very difficult for impulse-based systems
only |
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y*******g 发帖数: 33 | 35 It looks like 60GHz technology can only be used in LOS, right? |
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m*******a 发帖数: 192 | 36 Without careful designs, yes, 60 GHz works mainly in LOS. However, SiBEAM
chips already demoed successfully with the LOS blocked. They have some
careful designs I believe. Still, 60 GHz would be mainly for inside a room.
Recent news is that Tzero, WiQuest and Focus Enhancments closed down, "with
Artimi merging with Staccato. Texas Instruments early on quit chip
development and dispersed its design team and, while Intel dropped its own
chip development in favor of what emerges from startups such |
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J***n 发帖数: 25 | 39 我个人看法是,未来的很多年内做hybrid integration或封装集成会是个研究的热点,
不论对于做RF的或者其他的。
本人对纯电路设计还是比较外行,我不知道学术界的方向该是什么?
似乎现在纯IC Design的也经费不好拿了。
UWB,60GHz,ADC。。。感觉学校研究的火热期也刚过去。 |
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r*****e 发帖数: 620 | 40 802.15.4里uwb的ir 功率满足标准就能用吧
看你对datarate和power有什么要求? |
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g*g 发帖数: 6908 | 42 uwb现有实现不成熟,主要问题还是没有killer application.以后作为下一代的蓝牙技
术,也许有戏。但是蓝牙下一步仿佛要基于类似802.11n的技术走,跟踪多的同学来讲讲 |
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s**x 发帖数: 17 | 44 60GHz缺陷:
传输距离太近;载波频率太高;
好处:
plenty of bandwidth to waste;天线可以做的很小;
也许会比UWB结果好一点,五年后见分晓? |
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c****n 发帖数: 21367 | 45 嘿嘿,bottleneck是真的
但是哪来的高速率技术啊?我楼上就是死在60G, UWB俩坑里头的,
现在人家的室内实际传输1Gbps还没搞定呢...
3G |
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g****t 发帖数: 31659 | 46 1.
胡部长提出如何让超宽带通信技术集成到LTE里面,比如把20M
Hz带宽的LTE用UWB 扩展到100M Hz
2.
LTE上行下行用什么多址复用方式,为什么
3.
4G有哪些关键技术
各位动辄就是verdu的,我怎么觉得和杜克林不是一个领域的? |
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g******s 发帖数: 410 | 47 已经有了,最近(一个月之内)三星发布了UWB的显示器,同时带HDMI等有线接口。
10 |
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n******g 发帖数: 536 | 50 大坑,医学图像本来就不好找工作,更别说与雷达挂钩了 |
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