Distance ranges for different flavors of 802.11

Hello
Can anyone point me to a source (or provide here) a table or something that shows the different distance ranges for a//b/g/n? I know of course the figures are theoretical and all that but I've looked everywhere and came up only with numbers provided by the vendors themselves. I know for instance that n goes a lot further than b. But can't find the right numbers.

Thanks

Sorry I can post links yet.

But just search wiki for 802.11 they have a nice graph.

That's going to be a lot of complex overlapping graphs.

Vendors will always rate their products at the lowest data speed and zero system operating margin.

I can tell you 2,400 MHz (802.11b/g) can go 20 miles and turn around and say it will only go a 200 feet and both statement are entirely correct.

Here you go

Wireless standards

Hope this helps,
Sparks

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Sparks
Best Router

"Standards" are only as good as the the metrics used to define them.

Let's look at that referenced chart.

Standard: 802.11a
Max Speed: 54 Mbit/s
Distance (outdoors): 120meters or 131yards

I have dozens of links over 22 *MILES* using 802.11a 5.8 GHz. So that proves how inaccurate the "131 yards" is.

Standard: 802.11n MIMO
Max Speed: 450 Mbit/s
Distance (outdoors): 250m or 273yards

How can that claim be made without specifying the frequency used. I have 2.4 GHz links using 802.11n modulation that I wouldn't trust over 400 feet and some 5.8 GHz links I fully trust over 30 miles.

A second-chain only gives you a 3 dB improvement. It takes 6dB to double your range, so how can the chart explain twice the distance by using 102.11n?


Furthermore...It's speed or distance, pick one.

Let's say you have a one mile 10 Mbps link (typical for 102.11b or single-chain MCS-0) and I jump to MSC-7 (150 Mbps with 40 MHz channel width)...I take a 24 dB loss in performance. That means my distance is reduced to a mere 300 feet. I traded distance for speed.