UpToDateTech - Latest Comments

Re: Yahoo Domains the ideal place to buy your domains?

M Jahirul Islam Babu — Sat, 20 Oct 2012 08:21:33 -0000

Do you ever use
Google Look for Promotion strategies to promote your business? Do
you carefully set up your consideration and set up all settings? Do you know
why mouse clicks cannot convert to sales? If you don't do things right with Google Look
for Promotion, it's really difficult to generate income, and you may just throw
your cash to Google
and it’s provided partners.

Re: Yahoo Domains the ideal place to buy your domains?

M Jahirul Islam Babu — Sat, 20 Oct 2012 08:21:29 -0000

Re: Yahoo Domains the ideal place to buy your domains?

M Jahirul Islam Babu — Sat, 20 Oct 2012 08:21:25 -0000

Re: Yahoo Domains the ideal place to buy your domains?

M Jahirul Islam Babu — Sat, 20 Oct 2012 08:21:04 -0000

Re: Yahoo Domains the ideal place to buy your domains?

M Jahirul Islam Babu — Sat, 20 Oct 2012 08:18:16 -0000

Re: Yahoo Domains the ideal place to buy your domains?

M Jahirul Islam Babu — Sat, 20 Oct 2012 08:18:05 -0000

Re: iPad 3 vs. Samsung Galaxy Tab 7.7

Mem — Sat, 31 Mar 2012 04:25:05 -0000

What you on?

Re: iPad 3 vs. Samsung Galaxy Tab 7.7

WTF is this? — Fri, 30 Mar 2012 19:21:10 -0000

This is bullshit.

Re: CES 2012 – Kinect and Windows 8 dominate last MS keynote

Danielle Russell — Thu, 22 Mar 2012 16:10:21 -0000

Hello uptodatetech! Kinect is real innovation, not apple with their few years old tech and future looking designs.

Re: Get busy with Groovy Notes for PlayBook

Bob — Wed, 29 Feb 2012 11:58:22 -0000

great ap, I installed it on my Xoom.
Miss the option to add photos of my students to the reports I make with Groovy Notes.
And it would be great to have a similar program on my windows pc! So I can work out my reports at home.
But as I said, great!

Re: Are social networks the flag bearer for web 3.0?

Kalilo Kali Menar — Mon, 06 Feb 2012 18:35:21 -0000

http://www.bizzidate the new generation of sharing Platform. You can share all contents (friends, events, videos, photos, music).
Just in one place Bizzidate dot com

Re: Cool and powerful – Kidrobot Mix Master

Mehmet Ali Urul — Wed, 25 Jan 2012 13:34:24 -0000

Yep, they do!... Works beautifully with the iPhone!

Re: Cool and powerful – Kidrobot Mix Master

Thebult5 — Wed, 25 Jan 2012 13:15:14 -0000

do these work with a regular phone

Re: CES 2012 – LG announces 55″ OLED TV

gmanthebrave — Mon, 23 Jan 2012 13:15:47 -0000

I think the thinness is so impressive, but the display
probably doesn’t have any extra features in it.
There must be a need for placing additional electronics to enable other
features that will be included at launch.
I can’t wait until this technology is affordable though. I don’t have to wait much longer though for
the release of the new DISH Network multi-room HD DVR, The Hopper. I found out while at work at DISH that they
presented the receiver at CES with a favorable reception. I saw how it works and the 250 hours of HD
recording time is impressive and unprecedented for the pay TV industry. I love that it has TV apps and DVR in any
room with the Joey boxes; they replace a traditional receiver and can be hidden
behind any wall mounted TV. It was worth
not going to CES to support such a long awaited receiver back here in Denver.

Re: CES 2012 – The End (Highlights of the Event)

Mehmet Ali Urul — Tue, 17 Jan 2012 13:24:19 -0000

For me the ultrabooks were just amazing as well as Vizio's all in one computers. But the show really was jam-packed with great stuff, Microsoft failed me big time, only Windows 8 and personally I'm not a big fan... Need to wait and see...

Re: CES 2012 – The End (Highlights of the Event)

rose — Tue, 17 Jan 2012 10:56:51 -0000

I really liked the Ultrabooks that they showed at CES. That is something I definitely want to get when I get the chance. Another product that I liked at CES was the Hopper from DISH Network. I loved the way you could use the PrimeTime Anytime on only one tuner and the other tuners would still be free for other recordings. There were so many cool features on this receiver that once it is released I will be getting one. I got to check it out at DISH when I was working the other day and so many of the features were amazing. I am really excited about what I saw at CES and some of the products I cannot wait until they are released.

Re: LightSquared blames GPS interference on device manufacturers

Keithpeshak — Thu, 29 Dec 2011 17:22:56 -0000

LightSquared, or any competitor using near frequency strong terrestrial transmission, will produce an off-band signal that will be received by the GPS receiver because of the bandwidth of the GPS receiver "patch" antenna. This is called "quality factor" or "Q" and is a measure of center frequency divided by 3db bandwidth. Unfortunately, GPS uses a high frequency, and Q diminishes with frequency (why radios and TVs all use a lower frequency IF stage, to get better transmitter station selectivity, and do not count on the antenna or RF stage for much help there).

GPS receivers can use a DSP computer to, and we will use the analogy of a noise canceling headset, make an interference signal "anti-noise" to add into the desired signal with noise, to remove the noise from the desired signal. Unfortunately, the signal must also be heard in the signal plus noise coming from the antenna to the DSP computer input.

Design assumption: the filter between the patch antenna and the first LNA RF amplifier inside the GPS antenna must reduce the interference signal amplitude down to equal to or lesser than the desired GPS signal before the DSP computer can be effective at eliminating the noise.

If you have zero loss at the GPS bandpass, how much LightSquared signal attenuation do you need over the entire noise spectrum bandpass? Let's do a "back of the envelope" engineering guesstimate:

You need to reduce the power spectral density of the noise to or below the power spectral density of the signal. Power spectral density is measured in watts per square foot.

Watts (the undesired is stronger, goes proportionally):

db = 10 log Pi/Pr
How much does LightSquared transmit - don't know, keeps changing.
How much is the effective radiated power of a GPS satellite - there is a spec for that.

db = 10 log 15,750/300
db = 17.2

Square Feet (the undesired is closer, goes inverse square proportionally):

db = 10 log Rr**2/Ri**2
How far away is LightSquared - assume 1000 feet
How far away is a GPS satellite - assume 11,000 miles x 5,280 feet per mile
Surface of a sphere is 4 x Pi x radius squared
The 4 and the Pi factor out

db = 10 log (11,000 x 5,280)**2 / 1,000,000
db = 95.3

Attenuation required = 17.2 + 95.3 = 112.5db

If you have zero loss at the GPS bandpass, how much LightSquared signal attenuation do you need over the entire noise spectrum bandpass? Let's do this another way, using "the other side of the envelope" engineering numbers:

GPS is at around -127dBm on the ground.

LightSquared's lower, re-re-revised (they're going to turn it way up later, they admit) power level is -30dBm "near" their tower. Don't expect a definition of "near", and keep in mind that LightSquare keeps changing numbers.

Attenuation required = -30dbm - (-127dbm) = 97db

But what does this mean:

db is a log scale so 10db is a factor of 10, 20db is 100, 30db is 1000, 40db is 10,000, 50db is 100,000...

97db is, everybody get, 10**9.7 = LightSquared 5,011,872,336 times stronger than GPS

112.5db is, everybody get, 10**11.25 = LightSquared 177,827,941,000 times stronger than GPS

Really really really really big! Somehow, LightSquared accusing the PNT committee of being off by 32 times doesn't seem like much (only 15db)!

You can adjust the number down as LightSquared offers new lower power limits, and up as they increase the power as they claim they will. And you can adjust the number up as you decide on lower effective range limits (how far from the LightSquared tower your GPS should not work). You get the idea how this is done.

Hint, the antenna design will buy you something, which is not accounted for here, but not that much.

Hint, the DSP ability might be better than assumed, and this is the dimension where discovery and invention might make things considerably eventually better far in the future.

Hint, the configuration might be changed to allow multiple lesser attenuation filters in series, perhaps separated by amplifiers, but no amplifier can be allowed to saturate from the off-band interference signal, and "sneak paths" for the strong interference signal around filter segments, such as in the power circuitry for the amplifiers, or the printed circuit board dielectric, will easily destroy this topology option.

Anyway you approach the problem of separating a small signal, like a flashlight on the moon, from a large signal, like a nuclear bomb detonation from 1000 feet away, you are going to have a big engineering challenge ahead of you. Good luck, because we need a PNT system, and Loran has been terminated.

Re: Apple’s AirPlay technology to be supported by a special chip

Mehmet Ali Urul — Tue, 13 Dec 2011 11:09:07 -0000

Precisely, and one of the main reasons why AirPlay isn't getting much attention is because of the fact that it was only locked to the Apple devices. This completely locks down the demand and withdraws many potential customers. Makes the two of us, I connect to my HD projector wirelessly through WiFi using the DISH SA too, and does the job nicely.

Re: Apple’s AirPlay technology to be supported by a special chip

gmanthebrave — Tue, 13 Dec 2011 10:41:28 -0000

AirPlay is not getting as much attention as I thought it
would when the idea was released. I have
talked to many people advising me to avoid wireless speakers for my Blu-ray
system because of the inherent interference problems from various communication
signals. WiFi still remains stable and
interference free and so I simply connect my laptop to a TV and I have HD
streaming TV from my DISH Sling Adapter.
I use it on my iPhone and my Galaxy Tab since it has cross platform
functionality and it works anywhere I go and have internet. Nothing could be handier for when I would
rather be watching TV (I should make that into a bumper sticker.) The DMV the other day was much more enjoyable
as a result and I was nicer to the lady that helped me this time.

Re: Looking at the first Blackberry BBX superphone

Mehmet Ali Urul — Fri, 02 Dec 2011 04:41:49 -0000

I totally agree, this one seems like it is going to be a right cracker! I'm more of an Apple guy, since the early days, but the latest BB devices by RIM has got me thinking, time for a change? May be...

Re: Looking at the first Blackberry BBX superphone

Deano_w2 — Thu, 01 Dec 2011 19:01:19 -0000

That looks like a phone that could blow many smart phones out of the water.... cant wait until more info and images become available, got to keep an eye on this development for sure as i have fully enjoyed all my BB Devices; playbook, 9800, 9780 bold.

Re: Google finally able to read Facebook comments

Serap Aydemir — Fri, 04 Nov 2011 15:49:36 -0000

Daaammnnnnn!!! not long to go!! :-)

Re: ‘Let’s Talk iPhone’ taking place tomorrow

david kitchen — Tue, 04 Oct 2011 14:54:37 -0000

Marcus, today was a let down!

Re: Another 22 fake Apple stores have been discovered in China

Ken McFarlane — Sun, 14 Aug 2011 21:09:14 -0000

Its one thing for sure. You can find anything in China that is fake. Whats the capital of FAKE? Answer: China
Why am I not suprised...

Re: OS X Lion: Turn Off Natural Scrolling

Ken McFarlane — Mon, 01 Aug 2011 06:11:37 -0000

Thank you for this brilliant article/tutorial. Damn, that natural scrolling is so awful...Thanx Marcus