| 3.65 backhauls What's the current state of the 3.65 band vis-a-vis point to point connections, I.E. backhauls?
I see the Ubnt gear is only licensed for use on 25 mhz of the band, with no timetable for being licensed for the remaining 25 mhz. However, this is a MIMO link so it can modulate across an effective 50 mhz of frequency. Does anyone have experience with the speeds I can expect to see on a tight point to point 11 mi link? I haven't run the numbers, but I suspect we should be able to run that with an Ubnt Rocket M365 and their 26 dBi dish antenna.
Alternately, what other gear is reccommended for point to point links on 3.65? Are there any radios out there that can run 2x2 MIMO across all 50 mhz of spectrum? |
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| said by mcrose:is only licensed for use on 25 mhz of the band, with no timetable for being licensed for the remaining 25 mhz. However, this is a MIMO link so it can modulate across an effective 50 mhz of frequency. polarization does not work that way!
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| Heh, I thought that 2 chains doubled throughput for that reason. Regardless, the Ubiquiti device listed is a 2 chain MIMO device so should give double the throughput as a 1 chain device with the same symbol scheme.
Still, though, is there anything I should be looking at for PTP 3.65 links past the Ubiquiti hardware? |
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| Ubiquiti currently has the lowest priced 3.65GHz solutions on the market by a large margin. Anything else you look at will most likely be based on a WiMAX platform.
The vast majority of equipment for the 3.65GHz band has not been approved by the FCC for the upper 25MHz due to some pretty strict requirements.
Ubiquiti has claimed that they're in the process of getting approved for the upper 25MHz of the band. My guess is sometime this year.
For a PtP link using Ubiquiti Airmax/2x2 mimo gear and a 20MHz channel, under ideal circumstances, the link will give you almost 100mbps net throughput. Total link cost, around $600.
Radwin also makes high-capacity, carrier class PtP hardware for the 3.65GHz band capable of 100mbps net throughput... but will cost you around $4K per link. I do not believe they have access to the upper 25MHz yet. |
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| I've also found Ligowave equipment out there that does the same, looks about on par with the Radwin stuff in terms of both features and cost.
For the carrier-class stuff's price range I'd probably bite the bullet and just go full licensed for the links. Still, though, the Ubiquiti stuff looks tempting. Thanks for the info. |
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