Who said anything about using 802.16?  ;-)

I generally don't install a customer that has signal worse than -80.  I want 
to maintain full modulation as best as possible.  Can't expect to service 
too many customers if everyone has -88 signal.

I'm just looking to be able to go through a single tree row of trees on a 
fence line or maybe a small cluster...  no forests.  ;-)


-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com



--------------------------------------------------
From: "John Rock" <[EMAIL PROTECTED]>
Sent: Tuesday, December 02, 2008 11:21 AM
To: "'WISPA General List'" <wireless@wispa.org>
Subject: Re: [WISPA] 3650 Foliage

> We have many 3.65GHz WiMAX Base Stations deployed and propagation has been
> real positive even through some foliage.
> Picture1 -
> http://www.wirelessconnections.net/index.php?option=com_shared_private_space
> &task=showfile&fileid=117
> Picture2 -
> http://www.wirelessconnections.net/index.php?option=com_shared_private_space
> &task=showfile&fileid=118
> Picture3 -
> http://www.wirelessconnections.net/index.php?option=com_shared_private_space
> &task=showfile&fileid=119
>
> The above pictures are from a shot we had in Texas to a 3.65 Base Station, 
> I
> have more tree pictures.
> The customer had an older original Alvarion VL CPE at 5.8GHz. They 
> installed
> the VL on a 40 ft guyed mast pole, to get good SNR. At 3.65 GHz from 
> street
> level(12ft AGL) beside the house we had -75 dBm and downlink/uplink at
> 64QAM/16QAM respectively we pulled 6Mb/3Mb and perfect Voice calls from 
> the
> truck. The WISP is thrilled with their coverage in the small town even
> through foliage.
>
> As you can see we shot between two pine trees and "through" the other 
> trees.
> At this site we were almost 1.1 Miles away. I would classify the foliage 
> as
> "light".
>
> The key to everything is defining the word foliage. How dense is the
> foliage? How tall? How much power at the Base Station and CPE? Diversity?
> How far away are you from the Base Station?
>
> MIMO or second/fourth order diversity at 3.65Ghz is not being done at the
> CPE level yet and only on select type of Base Stations. At the Base 
> Stations
> with Second or Fourth order diversity we see greatly improved uplink
> capabilities and a lot better connectivity in NLOS environments because of
> the improved Uplinks. Passing reliable data at -85 to -92dBm is 
> obtainable,
> although I highly recommend only installing clients with "good" signal
> strength. Most systems require -74 to -78dBm or better to achieve reliable
> full burst rates(64QAM3/4)...When CPE become available with MIMO we can
> expect even better sensitivity in the Downlink also. It becomes a question
> on how long it takes the vendors to implement 802.16e flavored in 
> 3.65GHz.,
> Mid/Late 2009 is my bet.
>
> We can build an RF system at any frequency that can get through foliage, 
> it
> comes down to how much do you want to spend to get that type of coverage
> within your areas terrain.
>
> Thinking 3.65GHz can cover through foliage at long range is a myth. And I
> understand that most operators want to cover 50 miles NLOS from a single
> tower site at 75' AGL...
>
> 700 MHZ can work better if you own that spectrum for use? 3.65GHz is open 
> to
> about anyone.
>
> Thanks,
> John Rock
> Director of Operations - Senior Engineer
> Wireless Connections
> 166 Milan Ave., Norwalk, Oh. 44857
> ACCessing the Future Today!!
> ofc. 419.660.6100
> cell 419-706-7356
> fax 419-668-4077
> http://www.wirelessconnections.net
> This transmission and any files attached to it, may contain confidential
> and/or privileged information and intended only for the named recipient. 
> If
> you are not the intended recipient, you are hereby notified that any
> disclosure, reproduction, retransmission, dissemination, disclosure, 
> copying
> or any use of the information or files contained is strictly prohibited. 
> If
> you have received this transmission in error, please notify the sender by
> reply transmission and delete this electronic mail.
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
> Behalf Of Mike Hammett
> Sent: Tuesday, December 02, 2008 10:09 AM
> To: WISPA General List
> Subject: [WISPA] 3650 Foliage
>
> Have we gotten any reports how 3650 works with foliage?
>
> Would MIMO have any affect on foliage penetration ability?
>
>
> -----
> Mike Hammett
> Intelligent Computing Solutions
> http://www.ics-il.com
>
>
>
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