You could use multiple wifi routers or more correctly WAPS and use a directional antenna for north, south or north, south, east and west while setting each WAP to a different channel.
As you move out, you have to populate your system with RANGE EXPANDERS.
Good luck.
Bob
This is my situation:
I am trying to set up a small wireless ISP service here in tropical West Africa. I already have a VSAT connection to the Internet that I use for my Internet Cafe. I am trying to extend my wireless service to some homes in the immediate vicinity (1 mile radius). I have installed a 15dbi omni antenna at the top of our buliding connetected to a DLINK (Dl-614+) wireless router. I also have an amplifier connected to it. Length of cable (between omni and AP) is 98 ft.
What is ideal for the end-user computer to receive good signal? Driving around with my wireless enabled laptop, I can see my wireless network, and can connect to it but within a very short distance of the building. I have tried connecting from within a prospective subscriber's living room just 1/3 of a mile away and could not see the AP.
Do subscribers need special equipments to connect? How come I cannot connect with a regular wireless card or USB wireless adapter?

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