Zouhair
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General question about Fixed/Mobile Wimax
4 Replies

Started this discussion. Last reply by Mazlan Abbas Oct 6, 2008.

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Zouhair commented on Muhammad Shakhawat Hossain's blog post Configuration of MIMO Antenna
"Not exactly, it is confusing a bit, that why I've added the NB.   Upgrading to 4T4R will not double the spatial multiplexing gain, it will remain 2 (because CPE has 2 antennas).   But you will definitively increase the overall…"
Nov 3, 2011
Zouhair commented on Muhammad Shakhawat Hossain's blog post Configuration of MIMO Antenna
"You still get the 3 dB increase in your UL/DL link budget with actual CPEs.   The real benefit of a CPE with 4 antennas is doubling the spatial multiplexing gain (from actual 2 to 4), that is 4x the theoretical throughput, but as you said, such…"
Nov 3, 2011
Zouhair commented on Muhammad Shakhawat Hossain's blog post Configuration of MIMO Antenna
"Moving from 2T2R to 4T4R is obviously beneficial to your network. In 2T2R configuration, Beamformimg is not possible (cross antennas) but onece your system is upgraded to 4T4R, you can make use of this technique to mitigate interference and increase…"
Oct 24, 2011
Zouhair commented on Abhijeet kumar's blog post WIMAX INterfrence
"If you change ALL the site to 29:18, that's fine, but make sure you don't have any on 35:12.   than run interference study:   If you have only three channels (frequencies) you have to do a frequency planning and optimize the SNR…"
Aug 11, 2011
Zouhair commented on Abhijeet kumar's blog post WIMAX INterfrence
"Kumar, give more deployment details regarding your network. Are you referring to internal or external interference?   If you use different TDD splits (35:12 and 29:18) in the same market for close by sites than off course you will face severe…"
Aug 11, 2011
Yahya Khaled commented on Zouhair's blog post one 4x4 antenna vs. two 2x2 antenna
"Hi zouhair, I'm not expert on this but I've seen new deployments preferring 4 ports Antennas over the classical ones. Compact, better public optical view and easy to manage. They got electric tilts for each side and isolation is > 30dB.…"
Oct 24, 2010
Zouhair posted a blog post

one 4x4 antenna vs. two 2x2 antenna

Hi All,Deploying 4 antenna elements per sector will improve the link quality and capacity, that's obvious. Still we have to chose between one single 4 elements antenna, or, two 2 elements antenna (10 lambda separation).What are the pros and cons of each antenna? Is it true that we can not implement BF if we use the two 2x2 antenna? why, maybe BF calibration?Please advice, thanks.See More
Sep 8, 2010
Zouhair updated their profile
Oct 26, 2009

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Zouhair's Blog

one 4x4 antenna vs. two 2x2 antenna

Hi All,

Deploying 4 antenna elements per sector will improve the link quality and capacity, that's obvious. Still we have to chose between one single 4 elements antenna, or, two 2 elements antenna (10 lambda separation).

What are the pros and cons of each antenna?
Is it true that we can not implement BF if we use the two 2x2 antenna? why, maybe BF calibration?

Please advice, thanks.

Posted on September 8, 2010 at 5:00am — 1 Comment

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