Comments on: Satellite Guys To WiMAX: Why You Hate Us!

By: eduardo garza

eduardo garza — Thu, 03 Jul 2008 13:41:01 +0000

Sorry ,,,,,,,Correction…..

I’m no expert but in my experience in Monterrey, Mexico the WIMAX has seriously affected some areas who have DSS Directv (ka & Ku band )where the local telephone carrier (axtel) is starting to use motorolas Wimax solution. Since they changed and started operating the WIMAX solution . The interference has become a mayor disruption in the reception . The interference is so strong thats makes you unable to see almost any channel/transponder. Lately I been went around asking the neighbors in the area about there DSS reception and the majority comment that they have problems lately in there reception . The majority comment that they can’t watch almost any channel.

Again I no expert on this area hope this may help in any way.

By: eduardo garza

eduardo garza — Thu, 03 Jul 2008 13:34:25 +0000

I’m no expert but in my experience in Monterrey, Mexico the WIMAX has seriously affected some areas who have DSS Directv where the local telephone carrier (axtel) is starting to use motorolas Wimax solution.Since they changed and started operating the WIMAX solution .The interference has become a mayor disruption in the reception . The interference is so strong thats makes unable to almost any transponder.Lately I been asking questions of there DSS reception and the majority comment that they have problems lately in there reception around in the area. The majority comment that they can watch almost any channel.

Again I no expert on this area hope this may help in any way.

By: luisgj

luisgj — Wed, 09 Apr 2008 13:40:37 +0000

I disagree that rural private users will be the most affected by WiMax interference to satellite C-Band. I also disagree that most C-Band television providers have moved to Ku-Band. Tell that to HBO, ESPN, Discovery, etc, etc, etc.. There are gigahertz of C-Band transmissions into cable head-ends, network stations, you name it. And not just TV, but private networks, G0v networks, etc. And where you might be confortable with moderate interference, you can’t expect businesses with millions and millions of dollars riding on their transmissions to sit idle.

By: Top 3 saptamana 10 (17-21 mar ‘08) | Vlad Stan

Top 3 saptamana 10 (17-21 mar ‘08) | Vlad Stan — Sun, 23 Mar 2008 12:10:52 +0000

[...] Wimax interfereaza cu semnalele digitalte Satelit. via CTI97 [...]

By: Dilema wimax si inovatiile intel

Dilema wimax si inovatiile intel — Wed, 19 Mar 2008 20:26:14 +0000

[...] WiMax interfereaza cu undele de transmisii ale satelitilor si se cam bat cap in cap. Nasoala stire, mai ales ca au descoperit acest inconvenient tocmai acum cand se vorbea de adoptarea wimax pe [...]

By: lanphuong

lanphuong — Tue, 18 Mar 2008 00:47:28 +0000

Where we tonight shall camp?....The top blogs of the day. the newest report , see and reply me some comments. Thanks.

By: tech news blog » Satellite group calls out WiMax over interference

tech news blog » Satellite group calls out WiMax over interference — Mon, 17 Mar 2008 14:56:16 +0000

[...] Om Malik points out, the industry group “has conflicts out the wazoo”, so consider the study’s [...]

By: Mike Puchol

Mike Puchol — Mon, 17 Mar 2008 13:08:40 +0000

Matt: these exclusion zones will apply to registered FSS sites, not to normal sat TV subscribers I assume. These private users are the ones most at risk from interference.

By: Matt Liotta

Matt Liotta — Mon, 17 Mar 2008 13:00:49 +0000

To add to what Kevin said, there is no 3.5Ghz WiMAX in the US. However, there is 3.65Ghz WiMAX in the US, but the FCC has created 150km exclusion zones around the FSS locations. Any operator wishing to use 3.65Ghz within the 150km exclusion zone needs written permission from the FSS owner.

By: Kevin

Kevin — Mon, 17 Mar 2008 11:06:28 +0000

Om,

If you read the SUIRG test procedure you see that the WIMAX base station and devices that they are testing is in the 3.5 Ghz band. While this may be important to SUIRG and licensees in that band, it is not the band that Sprint and Clearwire are using. Sprint and Clearwire are licensees in the 2.5Ghz band.

By: Mike Puchol

Mike Puchol — Mon, 17 Mar 2008 10:30:24 +0000

I agree with most of what the report says, but I think there are also some problems with it. While it is true that there are still C-Band television providers (which is the main activity that takes place in this band), most of them have moved up to Ku-Band, and modern receivers and low-noise LNBs can work through all but the harshest weather conditions.

The usefulness of C-Band for disaster recovery, mentioned in the report, is not really that great, as the antennas needed to operate are much larger by definition, and not particularly easy to deploy in disaster scenarios. In disaster recovery, traditional HF and VHF are much more useful than any satellite based system, as radios can even be built with cheap COTS parts, and you don't need a service account with anyone to operate them.

What is certainly true is that the effective power received by a FSS from a WiMax station will be much higher than that from a satellite, and the LNB is going to be affected by the radiation entering from the sides, causing a very poor SNR.

While there is genuine concern for interference to FSS stations by WiMax, the C-Band is large enough to accommodate both services with moderate interference between them, and most importantly, RF spectrum is scarce enough today to warrant imposing work on one party to adapt its space to a second user.

By: Satellite Guys To WiMAX: Why You Hate Us! | Om Malik | Voices | AllThingsD

Mon, 17 Mar 2008 07:38:20 +0000

[...] Read the rest of this post Print all_things_di220:http://voices.allthingsd.com/20080316/satellite-guys-to-wimax-why-you-hate-us/ Sphere Comment Tagged: GigaOm, WiMAX, Om Malik, Voices, satellite, wireless | permalink [...]