I found one of you discussions and I could not find the solution. I have a similar challenge of setting up wireless internet services within 20-30 miles radius of a city and I hope that the answer to that same challenge will also benefit me. Can you please explain the solution that you gave Mr Murat's challenge at that time to me?
Proprietary solutions like LMDS and MMDS are doing just that. Actually, MMDS is more appropriate in your case. (LMDS - Local Multipoint Distribution Service,
MMDS - Multichannel Multipoint Distribution Service)
MMDS is being used by Sprint Broadband to provide Wireless broadband in some areas, however, they stopped accepting new customers. Official explanation was that MMDS is not economical solution.
IEEE 802.16 is an emetging standard poised to replace MMDS/LMDS and promissing up to 155 Mbps in the 2-10 GHx lisenced and 11-63 unlicences spectrum. 802.16 is for building wireless metropolitan area networks as an economical method of high-speed (2 - 155Mbps ) "last-mile" connection to public networks.
802.16 was ratified last December. It may take another half a year to a year to see any GA 802.16 equipment on the market.