b****g
发帖数: 1204 | 1 你指的这个网站？
http://blog.iphone-dev.org/
看的有点晕，应该下载哪个文件？
PwnApple. Compatible with iPhone 4 baseband 01.59.00 and iPhone 3G/3GS
baseband 04.26.08, 05.11.07, 05.12.01, 05.13.04 and 06.15.00! |
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c*****h
发帖数: 14923 | 2 先破解了再从cydia装ultrasn0w 1.2
iphone Dev Team's iPhone 4, 3G and 3GS software unlock, now with added
PwnApple. Compatible with iPhone 4 baseband 01.59.00 and iPhone 3G/3GS
baseband 04.26.08, 05.11.07, 05.12.01, 05.13.04 and 06.15.00! |
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N******7
发帖数: 1297 | 3 千万别先升，想好再说，一升级，baseband就成了5.14了，无法unlock。可以先越，然
后有customized的升，这样可以不升baseband。 |
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G*****r
发帖数: 523 | 4 just unlocked one during weekend.
4.2.1 3GS, baseband 5.15.04
第一步，升级baseband 到6.15， 不可逆，会让保修无效。（但2年满保修已经无效了）
然后redsnow越狱用超雪破解。据说这种方法会增加耗电，但用下来发现还好。
5.15.04目前直接破解无戏。 |
|
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i***1
发帖数: 2534 | 6 解锁只和baseband有关，
如果升级没有升baseband，确实可以完美解锁。。。 |
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y***m
发帖数: 7027 | 7 之前在4.3.3下试过好多次都无法升级到ipad baseband,是否因为os原因？需要降级到
4.2.1?thx!
http://jaxov.com/2011/03/how-to-upgrade-iphone-3gs-05-16-01-05-
eband-06-15-00/
Steps to Upgrade iPhone 3GS Baseband 05.16.01/02 to 06.15.00:
1. Make sure your iPhone 3GS is running iOS 4.1 or iOS 4.2.1. If you are
on
iOS 4.3.1 or iOS 4.3, use this guide to downgrade your firmware to iOS 4.2.1. |
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g**8
发帖数: 4951 | 8 这几年手机行业真是市场巨变的SEA CHANGE。在苹果手机轰轰烈烈的成功中其他很多厂商一下子败得就快消失了。三四年前NOK股价四五十块钱，现在四五块钱，RIMM股价当时一百多块钱，现在十几块钱，这两个公司都跌成前几年的十分之一。当时就勉强求存的PALM先被收购，接着上演了一出差不多白送产品的大戏，现在从产品到软件都正式消失和开源了。另一方面，苹果和三星现在占据了整个手机行业总利润的几乎全部，看到过不同的报道，但都是苹果差不多百分之八十上下，三星剩下的十几二十，其他厂商加起来拿到了个位数的全球手机利润百分比。AMAZING！其中三星的成功除了因为被苹果选中成为多项产品供应商得以在其中窥取苹果的产品设计和创意，所以模仿得最像苹果产品，而且他们从苹果本身的产品销售中得到巨额配件利润。另外就是谷歌的ANDROID，其实提供了最大帮助的就是对三星。三星本来在蓝莓和N95统治智能手机的年代在SMART PHONE上的全球占有率是百分之个位数，借助ANDROID和对苹果产品创意的窥取模仿，三星现在的市占率是当时的几十倍。在此之前，三星也是借助QUALCOMM等其他公司的帮助在手机行业起家的。只不过... 阅读全帖 |
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d***a
发帖数: 13752 | 9 那个叫Gevey卡贴，我LD的AT&T iPhone 4，回国时用过
怎么用，要看手机(4还是4S), iOS版本和基带(baseband)
如果升级到了最新的iOS和baseband，会比较复杂
Gevey的网站有相关信息: http://www.gevey.com/ |
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A*******g
发帖数: 607 | 10 http://news.cnet.com/8301-13579_3-57500358-37/exclusive-apple-s
棒子太无耻了：跟intel有过协议不能告intel的客户，还要来告：
One patent involved the baseband chip in the iPhone and iPad with 3G. During
the trial, Apple turned around and pointed to a licensing deal Samsung had
with Intel, which made the chips Apple used. Under that deal, Apple said
Samsung was not able to sue any companies Intel sold to. Apple then
presented the receipts from when it purchased the accused chips from Intel.
----------
Exclusive: Apple-Sams... 阅读全帖 |
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a***y
发帖数: 19743 | 11 反正没有baseband
就算有baseband问题，我的4S也已经unlock了 |
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k*****r
发帖数: 21039 | 12 LTE baseband是另外的芯片？ 这个比起qualcom s4和三爽的Exynos 4 core就差远了，
人家的都是SoC with APP and Baseband |
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i*****a
发帖数: 572 | 13 我有一部baseband为03.10.01跑iOS4.2.1的iphone4. 想破解之。
我是这样做的：
1. 在网上下载iPhone4.2.1 ipsw
2. 下载redsn0w， 然后把ipsw load到其中。然后按照其指令“破解”iphone。
可是照我所知，我倒是把iphone给越狱了，并没有破解它。据说这个baseband的iphone
比较难破解。
不知道大家有什么好的建议吗？ |
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u***r
发帖数: 4825 | 14 http://www.news9.com/story/26687529/cydia-for-ios-802-launched-
From various iPhone unlocking and jailbreaking services, a few are able to
unlock and jailbreak iOS 8.0.2 on iPhone 6,6 Plus 5, 5S or 5C. The online
unlocking company, UJB has recently been voted the fastest iPhone unlocking
iOS 8 service on the Internet. The company provides fast and smooth service
to gadget users as per their demands.. If you want to unlock iPhone that you
own or Jailbreak, now you can Unlock the iPhone 5, 5S, 5C,... 阅读全帖 |
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l****h
发帖数: 28 | 15 http://cellularinsights.com/iphone7/
iPhone 7 Plus: A Tale of Two Personalities
Like clockwork, every September the entire tech world gets excited for the
newest Apple device. The combination of a premium build, unmatched system
performance, and tightly integrated software and services delivers what’s
considered to be the gold standard in smartphone user experience.
Over the past five years, Apple’s modem supplier was Qualcomm, but this
year, Apple has taken a different approach with the decisio... 阅读全帖 |
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i****g
发帖数: 19 | 16 兄弟,
你要是做FPGA恐怕是 BASEBAND 吧.
TI 和 FREESCALE 可正在出卖他们的BASEBAND业务但卖不出去呀. |
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f*********t
发帖数: 37 | 17 "we know that the maximum symbol rate possible is Fs/2" I am not sure where
you get this.
If you mean Nyquist theorem. There are two versions.
1. For band limited signal, sampling rate should be higher than two times of
baseband signal bandwidth to recover the signal.
2. Symbol rate should be less than two times of baseband signal bandwidth to
avoid ISI.
Neither of them is what you said.
For the later part, I think you missed something in your system. you should
have an analog demodulator before |
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f*********t
发帖数: 37 | 18 I am not 高人.
You cannot know the modulated signal bandwidth just from the symbol rate.
This really depends on your modulation scheme. Like in GSM system, symbol
rate is 270.08333kHZ. The baseband bandwidth of the signal is only 100kHz.
When your symbol rate is higher than two times of the bandwidth of a
baseband signal, then ISI cannot be avoided. We need equalization to detect
signal.
note: GSM channel is usually known to be 200KHz, this number is passband
bandwidth after modulated on radio fre |
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C******e
发帖数: 1850 | 19 isn't the same modem used for data transfer as well. for example the dial up
modem for internet service. in data transfer, the baseband signal, for
example a data file containing random data, could have a wider bandwidth
than the carrier frequency, how do we do to make it band limited to the
carrier freq?
will
64kbps
baseband
telephone
higher |
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f*********t
发帖数: 37 | 20 look at the notes in my previous post, I said 100kHZ is the baseband
bandwidth. After up convert to carrier frequency, then it becomes 200kHz. I
believe in Nyquist theorem, the bandwidth is baseband bandwidth.
"as for nyquist, if the bandwidth is W Hz, then you can reconstruct the
waveform with >2W/s sample rate, right"
If this is how you get your conclusion, then we are not talking about the
same thing. In digital communication, we don't really reconstruct the whole
tranmitted signal. All we do |
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j******g
发帖数: 1098 | 21 还是我来给点有用的信息吧。
俺昨天刚从interdigital回来，给了一个talk，然后跟那边的几个director还有cto 聊
了一个下午。
interdigital就一个300人的公司，能给出几个opening？
更何况baseband不是interdigital的以后新的发展方向。
baseband，仍然是公司的核心部门，但是那几个director都认为利润增长幅度不大，他
家现在的CTO是做streaming出生的，公司下一个利润增长点也会放在streaming上。
不过PA的房子真是便宜，要是17万的年薪，2年就可以买个不错的house了，哈哈。
写仿真程序)强. 不能说太多了，it is also a small community.
势一片大好。她现在就闲的发怕。不知道以后是不是要抢活干。
head hunter indicated to her on the phone the position is with Interdigital.
I believe it pays well for that job title.
up
methods |
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t*****l
发帖数: 2658 | 22 这可能是为啥展讯SPRD这两天狂飙的原因了
难道三星没自己的baseband?
baseband
IC |
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m***e
发帖数: 12 | 23 dsp is for baseband.
and TI also has ASIC department which is baseband chip design. |
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g*g
发帖数: 6908 | 24 Rich Templeton 估计比较喜欢看报表，多年前他就鼓吹analog/mixed毛利高，增长稳
定等。当上CEO之后，看到利润率不高的部门，基本就会马上砍，几年前的wireless，
现在的omap等等，他是没啥耐心在某个竞争激烈的领域研发/厮杀的.不知以后analog/
mixed竞争更激烈了，他朝那里转进
当年的baseband组，到了3g是做不过qcom，但是接着做下来，也未必不是好选择，比如
，现在大家说ti只有application processor,没有baseband,是ti/omap的一个问题。
东西
arm |
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p****t
发帖数: 77 | 25 【 以下文字转载自 Chicago 讨论区 】
发信人: passat (passat), 信区: Chicago
标 题: Senior digital engineer job opening in Chicago
发信站: BBS 未名空间站 (Sun Feb 17 12:21:31 2013, 美东)
Based in downtown Chicago, we are a startup developing products for the
Wireless Communication market. We are growing and are looking to add an ASIC
DSP Engineer to our team.
The ideal candidate will have experience with Digital Signal Processing, SoC
Architecture/Implementation, Verilog, Matlab and verification methodologies
! For the right... 阅读全帖 |
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M***X
发帖数: 360 | 26
A8
瑞芯微发布3D TD手机,
TD baseband, RF 用哪家的?
MTK? Spectrum? |
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k******2
发帖数: 1396 | 27 没关系，Marvel其实是个中国公司，从baseband到processor都有。 |
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k*****r
发帖数: 21039 | 28 mediatek is being edged out by 展讯。
baseband and RF solutions are now commodities. real competition is in the
efficiency of integration, software and applications. |
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k*****r
发帖数: 21039 | 29 在mobile app processing, wireless baseband这两大块增长最快的sector, 做的很差
。
desktop sector也逐渐被cloud computing蚕食。 |
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t*******l
发帖数: 3662 | 30 台湾芯片设计厂商全面进入tablet的供货链
MCP module: PTI, ChipSiP
eMMC controller: Phison, Silicon Motion
SSD controller: JMicron
Baseband: MediaTek (MTK), VIA Telecom
RFIC: MediaTek, Silicon Motion
BT/GPS/WiFi: Ralink, Realtek
Application processor (stand alone): VIA technologies, WonderMedia
Touch IC: EETI, SiS
Optical Sensor: Capella, Elan
MEMS: Domintech, 3S
Image IC: Pixart, Sonix
Audio IC: Realtek
Noise cancelation: C-Media |
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t*******l
发帖数: 3662 | 31 MTK 多年前收购ADI手机芯片设计业务。MTK在baseband上的做的还不错。
后端和集成能力很强。不是你说的所谓技术一般。要是产品不行也无法
和freescale，qualcomm, broadcom竞争。另外MTK和nvidia比，就没法比，
不做一个东西的。除了最近Nvidia开始搞Tegra 的tablet业务，算是有一
点点overlap之外，两者根本就是target两个市场。Nvidia是GPU和gaming
industry。MTK是手机业务。另外MTK的电视芯片这个部分也很强，把欧美
的传统电视设计公司都挤垮了。Broadcom已经最近宣布撤出DTV市场，intel
也宣布撤出DTV市场。至少DTV这块，已经是台湾人的天下了。有没有技术
实力，看结果。能把东西集成的很好，设计出低功耗低成本的芯片，本身也
是技术实力的体现。 |
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l**i
发帖数: 8144 | 32 Here’s Why Chinese Tech Stocks Crashed
By Wall St. Cheat Sheet
Focus Media Holding Ltd. (NASDAQ:FMCN) is down over 45% after short selling
firm Muddy Waters made new allegations the company is engaging in fraud.
Throw in a broad-based market selloff, and Chinese tech stocks paid an
especially high price.
Here’s how Chines tech stocks are trading on the news:
* Focus Media Holding Ltd. (NASDAQ:FMCN): FMCN shares recently traded at
$15.60, down $9.9, or 38.82%. Its market capitalization is $2.... 阅读全帖 |
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t*******l
发帖数: 3662 | 33 上一代手机baseband这块，技术都在这几个公司
高通，marvell，MediaTek, TI, broadcomm才是掌握技术的公司。国内的展讯也还凑合
中兴华为手机技术上不是强项，要是说电信的局端设备，那个的确比较强 |
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k*****r
发帖数: 21039 | 34 设计很容易了，都是ARM的核，再集成baseband, media processing, I/O. |
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k*****r
发帖数: 21039 | 35 龙芯是基于MIPS的，还是有自己的东西，多核互联上。
华为的无线baseband芯片，都第7代了，手机的SoC, K3V2, 现在也第二代了。 |
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s****e
发帖数: 638 | 36 baseband core不也都SoC了么，一两百人就能搞了。有了个core以后加点外设改改
弄弄每年能出个1，2 代。欧美这样这样的公司倒掉几十个了。 |
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v********m
发帖数: 2147 | 37 hisilicon还是烧得起的，任总又给追加了10亿美金的投资，监控这块老大位置，K3V2
销量也很大，k3v3马上下半年也出来了，其他的我听说射频前端和Baseband也在搞 |
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b****n
发帖数: 228 | 38 TD-LTE and FDD LTE are similar in baseband. But in RF, TD using single
Channel and FDD need freq pair. Now FDD LTE is dominant because of history.
TD-LTE is getting popular for the low cost, single freq band and adjustable
Up/Down load ratio. All of the major players are beginning to support TD-LTE
. |
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