n**a
发帖数: 41 | 1 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 2 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: August/September 2007
Duration: 3 ~ 6 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE |
|
n**a
发帖数: 41 | 3 Mitsubishi Electric Research Lab in Boston is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and simulation for
IEEE 802.16-related system.
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferab |
|
n**a
发帖数: 41 | 4 Mitsubishi Electric Research Lab in Boston is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and simulation for
IEEE 802.16/4G-related system.
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol (e.g.,
interference coordination, resource allocation, etc) for next-generation
IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model devel |
|
n**a
发帖数: 41 | 5 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 6 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 7 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 8 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 9 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 10 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 11 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 12 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 13 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 14 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
n**a
发帖数: 41 | 15 Company: Mitsubishi Electric Research Lab
Location: Boston:
Starting date: May 2007
Duration: 3 ~ 4 months
Responsibility:
1. Design, analyze and simulate new/enhanced MAC protocol for next-
generation IEEE 802.16 OFDMA system
Requirement:
1) Experience with protocol design and evaluation for IEEE 802.16 OFDMA
systems
2) Extensive experience with OPNET model development and simulation
3) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
If yo |
|
h*d
发帖数: 19309 | 16 发信人: strong (大拿~恭祝清华百年华诞), 信区: TsinghuaCent
标 题: 清华大学的2010
发信站: 水木社区 (Sun Apr 24 14:46:09 2011), 站内
清华大学的2010
注：本文由水木社区BBS世纪清华版（TsinghuaCent）整理，各项资料来自清华大学网
站、清华大学新闻网、北京协和医学院（清华大学医学部）网站和水木社区BBS世纪清
华版等。
正文：
本文系统总结2010年度清华大学、北京协和医学院（清华大学医学部）师生校友荣获的
各类学术和社会荣誉、学科竞赛成绩以及学校在教学科研领域中获得的各类成果和进展
。限于篇幅，在关于各类获奖成果的统计中，本文仅统计获得过一等奖、金奖（国家科
学技术奖除外）以上的成果（绩）。
*********************
一．最高荣誉
●清华大学数学科学中心主任丘成桐教授获得2010年沃尔夫（Wolf）奖，以表彰他在几
何分析领域的贡献，以及在几何和物理的多个领域都产生的“深刻而引人注目的影响”
。这是丘成桐继1982年获得菲尔茨奖后，再... 阅读全帖 |
|
W*****e
发帖数: 7759 | 17 Not exactly, :-) For uplink, LTE uses SC-FDMA, which has the advantage of
lower PAPR against OFDMA. For downlink, both use OFDMA |
|
x***e
发帖数: 179 | 18 Is the encoded block size Ncbps for OFDMA or WiMAX the same as OFDM? I saw
its values in 802.16e 8.3.3.3, which is OFDM, but 8.4.9.3 (OFDMA) does not
mention its values at all. This parameter caused a lot of problems. Can we
define our own Ncbps for WiMAX? |
|
b******s
发帖数: 10 | 19 GSM 就好比社会主义. 用户没啥自由度，系统整体效率不高，但非常实用。每个用户所
能得到的资源有
自己的限额(a timeslot, 200kHz), 好比70，80年代每人每月半斤油，一斤猪肉.
CDMA要是没有功控的话，就是自由市场主导的资本主义。资源看上去是大家共享的，但
是得竞争。那些
有最高"power"的用户可以得到更好的服务，而且可能抢占甚至阻塞其他用户。功控就
好比法律和游戏
规则，大家都遵守的话，系统效率比GSM要高不少。但是总体来说，因为用户不是正交
的，资源还是得竞
争。
OFDMA就是共产主义啦：D 因为正交，所以人们不在有利益冲突。当然GSM用户间也没干
扰，但OFDMA
比GSM效率高。资源(RB)总是被分配给能最有效利用它的人(好比Frequency selective
scheduling). 还有重要的一点就是资源很充足(20MHz +).
欢迎大家补充啊。 |
|
d****g
发帖数: 236 | 20 不太明白用比喻来描述更清楚吗，好像一个三流的教师在教学生,误人子弟。OFDM就没
有竞争了吗？给一个用户分配很多资源，另外的用户就少了，无论是时间，频率还是功
率。无论是TDMA, CDMA, OFDMA，总的资源是不变的，只是改变了分配的方式而已，而
且都存在竞争。OFDMA资源很充足？没有听说过，采用了某种技术，频谱资源就会多。 |
|
h******b
发帖数: 12 | 21 FDD/TDD只是物理层双工的方式不同，至于物理层的基础OFDMA，更高层L2/L3/L4以及更
底层的RF，谁自主谁一统天下不言自明。连发科高通麦威尔苹果三星没有一家是大陆厂
商，中移动整天误导宣传所谓自主真是无耻至极。买来别人的芯片solution安上就自主
了么？
TDD天生残疾，手机是一个高度实时的嵌入式系统。为了满足TDD的时隙要求，很多任务
最后算出时间不够都要被丢弃，白白损失吞吐量。另外，TDD分到的频段都是很高的
band，电磁波频率越高越呈直线传播，衍射反射性能差。TDD的基站就像大wifi热点，
一个就能覆盖方圆几百米，纵然中移动有钱狂建基站，TDD覆盖也比不上FDD。FDD一个
基站大的能照方圆好几公里。
TDD速度慢覆盖差，只有脑残天朝用。米国三大运营商为了用户体验，当然不会让用户
去漫游中移动的垃圾TDD网络。联通的HSDPA速度覆盖可靠性完爆TDD。另外，在FDD外单
独测试TDD也要额外花费大量资源，苹果不是傻的，最多人用的机器上直接拿掉TDD多方
便 |
|
i********r
发帖数: 12113 | 22 LTE advanced features大家都在做，没看出能差到哪儿去。再跟你说一遍，LTE用的
OFDMA，别CDMA，CDMA的，让人笑话。哥睡觉去了，你自己慢慢撸，悠着点，别折了
cpu |
|
c*****g
发帖数: 21627 | 23 【 以下文字转载自 IndustryParty 俱乐部 】
发信人: choming (请抵制“十万强插”计划！), 信区: IndustryParty
标 题: 揭秘4G核心专利
发信站: BBS 未名空间站 (Mon Jun 8 04:14:08 2015, 美东)
揭秘4G核心专利 (2015-03-03 19:30:02)
从2012年10月份决定写《通信之道》，到现在差不多两年半的时间，第一版终于成稿，
以此文作结。
3G霸主
1985年，在美国硅谷成立了一家叫Qualcomm(高通)的公司。 这家公司把军用的CDMA技
术用于民用通信，推出了IS-95标准，成为与欧洲的GSM竞争的第二代移动通信系统。
在第二代的商业竞争当中，GSM还是取得了的胜利。但是在高通公司的创始人当中有一
位世界级的科学家，叫做Andrew Viterbi，就是那位Viterbi译码算法的发明人，IEEE
Fellow，并获得了美国最高科技奖。在他的推动下，产业界相信了CDMA代表了无线通信
技术的发展方向，因此第三代移动通信的三个国际标准，WCDMA， CDMA2000和TD-SCDMA
都采... 阅读全帖 |
|
m*******e
发帖数: 1598 | 24 【 以下文字转载自 EE 讨论区 】
发信人: zhizunbao123 (你在红楼我在西游), 信区: EE
标 题: 怎样看待华为前工程师杨学志关于4G核心专利的看法？ (转载)
发信站: BBS 未名空间站 (Wed Jun 10 09:23:41 2015, 美东)
发信人: baodiao (钓鱼岛), 信区: PDA
标 题: 怎样看待华为前工程师杨学志关于4G核心专利的看法？
发信站: BBS 未名空间站 (Tue Jun 9 14:03:22 2015, 美东)
从网上看到一篇华为前工程师杨学志关于4G核心专利的看法， 不知各位有何高见？
当事人揭秘4G核心专利：高通没那么多，中国没那么少！
http://www.c114.net/news/41/a886875.html
1985年，在美国硅谷成立了一家叫Qualcomm(高通)的公司。这家公司把军用的CDMA技术
用于民用通信，推出了IS-95标准，成为与欧洲的GSM竞争的第二代移动通信系统。
在第二代的商业竞争当中，GSM还是取得了的胜利。但是在高通公司的创始人当中有一
位世界级的科学家，叫做Andrew V... 阅读全帖 |
|
发帖数: 1 | 25 无线通信产业已经发展了四代，目前正处于5G产业化前夕，是当下到一个最热的话题，
5G如何发展，前景如何，是各个方面包括学术界、产业界、投资界以及政府都非常关心
的。另外，中国已经启动6G研究的消息也见诸报端，未来无线通信产业如何发展，是不
是会继续有6、7、8、9G，也引起了大家的关切。为了回答这些问题，我们首先简单地
回顾一下无线通信产业发展的历史。
无线通信产业是由需求和技术两个轮子驱动前进的。早在1947年，贝尔实验室的科学家
就提出了蜂窝通信的概念，其中的核心技术是频率复用和切换。基于这一概念，贝尔实
验室于1978年研制出先进移动电话系统（Advanced Mobile Phone Service，AMPS），
这就是第一代移动通信系统。AMPS是一个模拟通信系统，采用频分多址（FDMA）的复用
技术，主要技术手段是滤波器，容易受噪声的干扰，语音质量较差。
随着集成电路技术的发展，第二代移动通信系统采用了数字技术，并采用TDMA和信道编
码技术，使得通信系统向宽带化发展，语音质量得到了较大的改善。 其中欧洲制定的
GSM系统非常成功，至今仍在广泛使用。
20世纪9... 阅读全帖 |
|
M******8
发帖数: 10589 | 26 https://www.iyiou.com/p/93766.html
产业综合
塬上草
杨学志
[ 亿欧导读 ] 5G是无线通信的下一代技术，也是当前最热的话题。不过，对于5G的价
值也有一些质疑之声。
【编者按】5G是无线通信的下一代技术，也是当前最热的话题。不过，对于5G的价值也
有一些质疑之声。近日，《通信之道》作者、技术大牛杨学志在通信人家园发文，从技
术角度论证5G是“失败的技术”。内容比较新颖，还请读者自行评判。
文章来源塬上草，作者，杨学志，经亿欧编辑发布，供业内人士参考。
各工作岗位将被AI取代的概率
无线通信产业已经发展了四代，目前正处于5G产业化前夕，是当下到一个最热的话题，
5G如何发展，前景如何，是各个方面包括学术界、产业界、投资界以及政府都非常关心
的。另外，中国已经启动6G研究的消息也见诸报端，未来无线通信产业如何发展，是不
是会继续有6、7、8、9G，也引起了大家的关切。为了回答这些问题，我们首先简单地
回顾一下无线通信产业发展的历史。
无线通信产业是由需求和技术两个轮子驱动前进的。早在1947年，贝尔实验室的科学家
就提出了蜂窝通信的概念，其中的核心技... 阅读全帖 |
|
t*****r
发帖数: 122 | 27 最近收到一个电面通知，职位是senior system engineer，有人有收到类似电面吗？问
题主要集中在基础理论还是research相关？
thanks
Job Title： Systems Engineer - PHY and MAC Layer - All Levels
Post Date： 10/09/2012
Company - Division： Qualcomm Technologies, Inc. - CDMA Technology
Location： California - San Diego
Job Function：QCT's Modem Systems team is responsible for the system
engineering of complex digital ASIC products covering a broad range of next
generation mobile wireless communication technologies such as LTE, TD-SCDMA,
OFDMA and MIMO, ... 阅读全帖 |
|
n**a
发帖数: 41 | 28 A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
3) Have experience with protocol design an |
|
m****s
发帖数: 18160 | 29 【 以下文字转载自 Arizona 讨论区 】
发信人: nyca (nyca), 信区: Arizona
标 题: intern position available
发信站: BBS 未名空间站 (Tue Dec 5 00:46:09 2006)
A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum |
|
n**a
发帖数: 41 | 30 Internship opportunity at Mitsubishi Electric Research Labs, Cambridge,MA.
Duration: 3-6 months
Start date: May 1, 2009
Job description:
The candidate should have a strong background in MAC layer design for
wireless personal area networks, particularly for OFDMA based systems.
Expertise in channel resource allocation and channel diversity techniques
for high communication reliability in delay and data rate constrained
networks is required. Exposure to OFDM physical layer is a plus. The
assignmen |
|
u*****a
发帖数: 6276 | 31 【 以下文字转载自 PDA 讨论区 】
发信人: baodiao (钓鱼岛), 信区: PDA
标 题: 怎样看待华为前工程师杨学志关于4G核心专利的看法？
发信站: BBS 未名空间站 (Tue Jun 9 14:03:22 2015, 美东)
从网上看到一篇华为前工程师杨学志关于4G核心专利的看法， 不知各位有何高见？
当事人揭秘4G核心专利：高通没那么多，中国没那么少！
http://www.c114.net/news/41/a886875.html
1985年，在美国硅谷成立了一家叫Qualcomm(高通)的公司。这家公司把军用的CDMA技术
用于民用通信，推出了IS-95标准，成为与欧洲的GSM竞争的第二代移动通信系统。
在第二代的商业竞争当中，GSM还是取得了的胜利。但是在高通公司的创始人当中有一
位世界级的科学家，叫做Andrew Viterbi，就是那位Viterbi译码算法的发明人，IEEE
Fellow，并获得了美国最高科技奖。在他的推动下，产业界相信了CDMA代表了无线通信
技术的发展方向，因此第三代移动通信的三个国际标准，WCDMA，CDMA2000和TD-... 阅读全帖 |
|
d********0
发帖数: 5142 | 32 你做什么专业的啊？ 一口一个FCC的。。。。
学术界，居然要拿这个词说话？？？？
我们连MIMO和OFDMA都做过的，你那点term糊弄谁啊？
好。 |
|
w**********l
发帖数: 8501 | 33 手机会用到通讯的技术，只是通讯的其中一个分支，但不是全部。
比如cdma，tdma，这些都是通讯的技术，用到手机上而已。
现在的新技术还有mimo，ofdma等。 |
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s********n
发帖数: 166 | 34 Topics about physical layer of wireless communications:
* Modulation, channel coding, diversity
* Equalization, synchronization
* Space-time, MIMO, adaptive antennas
* OFDM/OFDMA, CDMA, spread spectrum
* Channel modeling and characterization
* Interference management and MUD
有兴趣请站内联系。 |
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s*****o
发帖数: 1540 | 35 给我站内发信,告诉我你能审那一篇的编号．要求
１：PHD already or almost obtained in CS or EE。为保证审稿质量，必须是相关专
业的。不可能给其它无关专业博士审理，见谅。
2: Due May 23th
3: let me know your edas id. (If you don't have an edas, I assume you are
not working in these fields).
A: Markov-based Model, IEEE 802.11p MAC Sub-layer with Unsaturated Traffic,
performance analysis of the proposed model
B: Opportunistic Relay Selection, Cooperative Energy Harvesting
Communication Networks,multi-agent stochastic system, partially observable
Markov decisio... 阅读全帖 |
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n**a
发帖数: 41 | 36 A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
3) Have experience with protocol design an |
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n**a
发帖数: 41 | 37 A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
3) Have experience with protocol design an |
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n**a
发帖数: 41 | 38 A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
3) Have experience with protocol design an |
|
n**a
发帖数: 41 | 39 A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
3) Have experience with protocol design an |
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m***e
发帖数: 89 | 40 【 以下文字转载自 PDA 讨论区 】
发信人: baodiao (钓鱼岛), 信区: PDA
标 题: 怎样看待华为前工程师杨学志关于4G核心专利的看法？
发信站: BBS 未名空间站 (Tue Jun 9 14:03:22 2015, 美东)
从网上看到一篇华为前工程师杨学志关于4G核心专利的看法， 不知各位有何高见？
当事人揭秘4G核心专利：高通没那么多，中国没那么少！
http://www.c114.net/news/41/a886875.html
1985年，在美国硅谷成立了一家叫Qualcomm(高通)的公司。这家公司把军用的CDMA技术
用于民用通信，推出了IS-95标准，成为与欧洲的GSM竞争的第二代移动通信系统。
在第二代的商业竞争当中，GSM还是取得了的胜利。但是在高通公司的创始人当中有一
位世界级的科学家，叫做Andrew Viterbi，就是那位Viterbi译码算法的发明人，IEEE
Fellow，并获得了美国最高科技奖。在他的推动下，产业界相信了CDMA代表了无线通信
技术的发展方向，因此第三代移动通信的三个国际标准，WCDMA，CDMA2000和TD-... 阅读全帖 |
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d****y
发帖数: 472 | 41 Our company, Purewave Networks at Mountain View, CA
http://www.purewavenetworks.com/
has the following openings. If you are interested in the opportunities,
please feel free to contact me and I would like to recommend to our VP
Engineering.
Regards,
Allen Liu
Email: a**[email protected]
Sr. Software Engineer - Networking and Application
JOB DESCRIPTION:
The PureWave Networking Software Team is responsible for implementation of
our Element Management System and multi-protocol embedded agent for our
Wi... 阅读全帖 |
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m*****1
发帖数: 2546 | 42 首先我没IP
LTE 的在手机上的技术不一样， 是OFDMA/SC-FDMA， 而且应该是多天线的。
3G 都是CDMA 的。
）? |
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m**t
发帖数: 1292 | 43 WiMAX反正是新东西，Nokia好像过去几年挺重视这方面，比如mobile IP德发明人
charles perkins 几年前就从Sun 去了Nokia 搞NGN了,应该说网络层baseband是比较强
，不过不知道OFDMA和天线技术等如何 |
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j*a
发帖数: 14423 | 44 http://www.enet.com.cn/article/2007/1019/A20071019876766.shtml
10月18日晚，据外电消息，无线宽带技术WiMAX已经正式成为3G标准，此前，它一
直是被看作“3G的补充”。据悉，此前一对反对WiMAX成为国际标准的德国，最终在有
条件的前提下同意。
WiMAX标准为全球统一频谱扫清障碍，以OFDMA WMAN TDD的名义成为3G新成员。国
际电信联盟(ITU)在日内瓦举行的无线通信(Radio Assembly)全体会议上，与会国家通
过投票正式通过了这一决定。
2001年4月，ITU正式确立欧洲WCDMA、美国CDMA2000和中国TD-SCDMA为世界三大3G
标准。目前，除中国之外，绝大多数国家的3G TDD频谱都处于闲置状态，WiMAX如今将
正式“转正”，与现有的移动通信技术站在同一起跑线，包括与中国3G标准TD-SCDMA共
同占有TDD频段。
来源：enet |
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y*y
发帖数: 427 | 45 LTE rel-8/9也不是4G,要不然现在3gpp-RAN干吗一个月开一次会赶罗rel-10给IMT-A交
作业。VZN上的是rel-8。想真4G，至少4年后。LTE-8/9和Wimax应该都交到IMT-2000，但是又都是OFDMA,可以算是3.5G或者准4g.
再说了wimax一样是若干billion。Vodafone牛不牛？自己说要在印度BWA招标上WiMAX。
技术成败有多方因素。只看online news和事实真相还差的远。
作为普通用户，只看价格和性能，who cares what standard it is? |
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