LMDS (local mulitpoint distribution service)

Located in the 28 GHz and 31 GHz bands, LMDS is a broadband radio service designed to provide two-way transmission of voice, high-speed data and video (wireless cable TV). (Cingular)

Local Multipoint Distribution Service is a broadband wireless access technology that uses microwave signals operating between the 26GHz and 29GHz bands. In the United States, frequencies from 31.0 through 31.3 GHz are also considered LMDS frequencies.

LMDS is a point-to-multipoint service, hence is typically deployed for access by multiple parties. Throughput capacity and distance of the link depends on the modulation method used - either phase-shift keying or amplitude modulation. Links up to 5 miles (8 km) from the base station are possible, but distance is typically limited to 1.5 miles by rain fade because heavy rain can severely attenuate signal levels.

Point-to-point systems are also capable of using the LMDS frequencies and can reach slightly farther distances due to increased antenna gain

(Wikipedia)