802.11n technology

I was admiring the new switch with my brother and I thought about the 802.11g router that is sitting on top of the switch.┬á I want to upgrade to 802.11n but I do not want to buy any pre-n devices.┬á The pre-n devices will never be as compatible with future devices as the true n devices but it seems that I will have to wait until the end of 2006 or the beginning of 2007 for the standard.┬á Maybe next year I will be connected using an “n” card.

The standard should boast 108Mbps or even as high as 200Mbps.┬á Here are some other technical details so far.┬á Technologies present in the 802.11g standard such as Orthogonal Frequency Division Multiplexing (OFDM), forward error correction (FEC) coding, and quadrature amplitude modulation (QAM) will still be used.┬á When I read that, I wondered what is changing.┬á Using OFDM should provide for fluid backwards compatibility with “g” cards.┬á The standard employs the use of two antennas instead of one in a technology known as Multiple Input Multiple Output (MIMO).┬á This should reduce interference and increase speed.┬á More channels will also be used.┬á This should increase bandwidth but I imagine that it will also reduce the number of non-overlapping channels available to administrators who desire to co-locate their APs.

Another thing I wonder about is what Apple will call their “n” capable cards.┬á They do not stick to the standard nomenclature.┬á Their 802.11b card was called the AirPort and their 802.11g card the AirPort Extreme.┬á My plan is to upgrade the AirPort Extreme card on my laptop and put it in my G4 cube.┬á The other laptops will get new PCMCIA cards.┬á I have to make sure the G4 will handle the extreme card.

Here is a good technical overview on some parts of the standard.  http://www.deviceforge.com/articles/AT5096801417.html

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