A comparison of wi-fi and wimax with case studies - Florida State ...
A comparison of wi-fi and wimax with case studies - Florida State ...
A comparison of wi-fi and wimax with case studies - Florida State ...
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Table 3-3 Cont.<br />
10 2.457 X Y Y Y Y<br />
11 2.462 X Y Y Y Y<br />
12 2.467 X X Y Y X<br />
13 2.472 X X Y Y X<br />
14 2.484 Y X X X X<br />
Table 3-4 IEEE 802.11a Channel Used for North America<br />
B<strong>and</strong> (GHz) Frequency (GHz) Channel Number<br />
5.15 – 5.25<br />
UNII Lower B<strong>and</strong><br />
5.25 – 5.35<br />
UNII Middle B<strong>and</strong><br />
5.725 – 5.825<br />
UNII Upper B<strong>and</strong><br />
5.180 36<br />
5.200 40<br />
5.220 44<br />
5.240 48<br />
5.260 52<br />
5.280 56<br />
5.300 60<br />
5.320 64<br />
5.745 149<br />
5.765 153<br />
5.785 157<br />
5.805 161<br />
802.11b/g is the most <strong>wi</strong>dely used st<strong>and</strong>ard for WLAN. Because <strong>of</strong> the different operation<br />
b<strong>and</strong>, 802.11a cannot cooperate <strong>wi</strong>th b/g st<strong>and</strong>ard. Also, there are some other problems, such as<br />
its high cost for equipments. The working b<strong>and</strong> is also not free for all countries, <strong>and</strong> has a lower<br />
transmission distance. However it is still used currently, because it is fast, stable, <strong>and</strong> has high<br />
capacity. Also, some people think that the lower transmission distance makes the network more<br />
13
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