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'" <[email protected]> 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 > > > > ---------------------------------------------------------------------------- > ---- > WISPA Wants You! 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