bcbuie
join:2005-07-20
| reply to bcbuie
Re: Wave IP OFDM 5.8 GHz Gear
John is right, I would stick with the 900 band for heavy trees. Although it doesn't look like your tree situation is bad, mine makes that look like a walk in the park 
5.8GHZ NLOS is most effective in city environments where multipath reflections from buildings are your main problem (and not so much absorption by trees).
900MHZ OFDM would be the best of all worlds obviously. Some people don't like 900 for the "interference problems", but honestly with H-POL and with everyone moving up the band to 2.4GHZ or 5.8GHZ, interference isn't really a huge issue any more than it is with any other band (unless it is licensed). I imagine 2 years from now 2.4GHZ and 5.8GHZ will be much more crowded than 900MHZ. |
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cgordy
join:2004-02-12
Kansas City, MO
| The 5.8Gear is a great PTP or PTMP solution. We just got the firmware upgrade today that increases throughput per AU to 30MBPS IP throughput. We have links 20 miles off of a 90degree sector.
But for the ability to use the RSU's in large scale with trees you absolutely want to use the 900Mhz product.
In the unlicensed you will soon see their 2.4OFDM as well. 20Mhz = 30Mbps IP throughput.
The 900OFDM is just starting to ship and is on backorder huge. We are deploying it currently with great results. We are putting 4 sectors of 5.8 and 8 sectors of 900 on each tower. 5.8 120Mbps total 900Mhz 56Mbps total. Nice solution. |
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John Galt
Forward, March
Premium
join:2004-09-30
Happy Camp
 ·CenturyLink
| said by cgordy  :We are deploying it currently with great results. We are putting 4 sectors of 5.8 and 8 sectors of 900 on each tower. 5.8 120Mbps total 900Mhz 56Mbps total. Nice solution. It probably should be noted that all of these AP's are GPS sync'd...so they can co-exist peacefully.
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| reply to bcbuie
said by bcbuie :900MHZ OFDM would be the best of all worlds obviously. Some people don't like 900 for the "interference problems", but honestly with H-POL and with everyone moving up the band to 2.4GHZ or 5.8GHZ, interference isn't really a huge issue any more than it is with any other band (unless it is licensed). I imagine 2 years from now 2.4GHZ and 5.8GHZ will be much more crowded than 900MHZ. I imagine that this may be the case in some places?, but in others, the total opposite is true. If You reside in an urban or even suburban area and there are a large amount of public works projects functioning(city water and sewerage, gas lines, petroleum storage facilities etc), the amount of 900Mhz noise is overwhelming to say the least. With older SCADA systems, their engineering is poor because of the age of the radios in use, and they tend to use up the entire band. In my area, the city is using V. polarity and the gas CO is using H polarity because they were interfering with each other. This has totally destroyed the 900 Mhz spectrum in my area. There are 3 WISP's here, and none of us have even tried 900Mhz because of his. I am sure that if I were to use Motorola gear, I would be able to link to customers, but then I wonder what the Motorola gear will do to the SCADA systems, considering what it does to other 2.4 and 5.8Ghz systems when deployed in areas where other less interference resistant gear have been in place before hand?
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DejanCDN
join:2004-11-17
Kuwait | reply to sbeasley
OFDM will help with NLOS in urban environments, but I doubt very much it will do anything for trees...not at 5.8 |
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John Galt
Forward, March
Premium
join:2004-09-30
Happy Camp
·CenturyLink
| reply to superdog
said by superdog :If You reside in an urban or even suburban area and there are a large amount of public works projects functioning(city water and sewerage, gas lines, petroleum storage facilities etc), the amount of 900Mhz noise is overwhelming to say the least. With older SCADA systems, their engineering is poor because of the age of the radios in use, and they tend to use up the entire band. In my area, the city is using V. polarity and the gas CO is using H polarity because they were interfering with each other. This has totally destroyed the 900 Mhz spectrum in my area. In one city that I visited that was using 900 MHz, the WISP contacted the city departments and explained the situation. They understood that their old equipment was not playing nicely with others. They agreed that the WISP could handle their data for them, and the departments even bought the radios. The WISP provided the bandwidth for free. These sites send infrequent data that can be in the byte range, let alone kilobytes.
Everyone is happy.
Before anyone comments on the obvious...all of these systems operate under local automatic control, that is, they do not require the radio link to function properly. They can be controlled by the radio, but it is not REQUIRED. The reason for this is that it is recognized that the radio can fail, or be interfered with, so the controls constructor builds them to operate independently in an automatic mode.
Maybe you should try a Motorola AP in your area. The other users are subject to the same rules that you are...acceptance of interference, so on and so forth.
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dr_boom
join:2002-04-10
Pataskala, OH | reply to bcbuie
Has anyone looked at the 700Mhz OFDM? Wouldn't this be better for NLOS through heavy trees than the 900Mhz OFDM? |
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Believer
join:2002-07-04
Baltimore, MD | reply to sbeasley
700MHz is a licensed frequency so while it should work a lot better than 900MHz, you'd need the frequency license to use it. |
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sbeasley
join:2005-06-28
Albion, IN | Right and in my area the license has already been bought. The FCC auctioned it off a while back, and mine got bought up. |
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ludde
join:2005-08-02
Wilmington, NC
| reply to dr_boom
Is there any radio expert out there?
I would like to know if OFDM is inherently better at sustaining higher modulatiion than that is CDMA.
Since the bitrate of each data stream on the different tones is quite low then Intra Symbol Interference could also be kept low? Meaning that one could use higher modulation without losing data. |
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John Galt
Forward, March
Premium
join:2004-09-30
Happy Camp | Start this as a new thread...
It is a good question and shouldn't get "buried"...
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scooby
Premium
join:2001-05-01
Schaumburg, IL | reply to sbeasley
If the 900 OFDM is starting to ship, why are there not any specs on the waveip site? I'd love to see the price on a starter kit, ap's, sm's, etc. |
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sbeasley
join:2005-06-28
Albion, IN
| Curt Gordy says he is going to get a spec sheet together, but I haven't seen anything yet. WaveIP gave me a quote as follows
Prices for GigAccess(tm) OFDM 900 MHz:
Access Unit (AU) - Includes: Outdoor Radio Unit (with external antenna port), power supply, Mounting Hardware, Outlet and screws : $1396.
Outdoor Subscriber Unit (OSU) - Includes: Outdoor Radio Unit (with external antenna port), power supply, Mounting Hardware, Outlet and screws : $546
Residential Subscriber Unit (RSU) - Includes: Self install Indoor Radio with integrated antenna and power supply: $446
I hope this helps |
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scooby
Premium
join:2001-05-01
Schaumburg, IL | reply to sbeasley
Thanks! pricing is not bad. |
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sbeasley
join:2005-06-28
Albion, IN | reply to scooby
Wave IP OFDM 900 MHz Gear
@scooby, and all those else who are interested.
I just received the spec sheet for the new 900 MHz OFDM Gear, and you can find it here: Clickie |
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kewlkeed
Grouch
Premium
join:2005-02-05
Knowlton, QC
1 edit | reply to sbeasley
Re: Wave IP OFDM 5.8 GHz Gear
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Sorry killed my last post (Got my answer) but have a second question
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I just called a distributer for WaveIP (won't give names) and he basically shot the product down. He wasn't openly bashing them but he made it very clear that he didn't think the product was any good. Has anyone here had any bad issues with their equipment or was I just a victim of someone trying to sell me another line instead?...
Sorry for hijacking the post a bit, just PM me if you have an answer and we'll keep it on track. Thanks! |
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scooby
Premium
join:2001-05-01
Schaumburg, IL | reply to sbeasley
what product did they "suggest"? |
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wispman
join:2004-12-21
USA | reply to kewlkeed
I sure have heard the opposite. They cost the most. And you generally get what you pay for. Decide for yourself. |
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kewlkeed
Grouch
Premium
join:2005-02-05
Knowlton, QC
1 edit | reply to sbeasley
He suggested Motorola. So yeah 
Chances have it motivated by another company.
I'd like to try the WaveIP units myself but given the price it's a bit hefty to just fork out if the units aren't any good. Most everyone I know speaks pretty highly of them but this was the first I heard someone flat out say there were no good. |
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John Galt
Forward, March
Premium
join:2004-09-30
Happy Camp
·CenturyLink
| said by kewlkeed :Most everyone I know speaks pretty highly of them but this was the first I heard someone flat out say there were no good. Motorola is no good...so there, everything is even now.
The distributor probably makes more profit on the Motorola gear.
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