Residential Broadband, Second Edition

Local Multipoint Distribution Service

A more aggressive strategy than MMDS is a new delivery service called Local Multipoint Distribution Services (LMDS), also known in Canada as Local Multipoint Communication Service (LMCS). LMDS is a two-way, high bit rate, wireless service under development by a variety of carriers to vastly increase bandwidth. The main differences between LMDS and MMDS are that LMDS occupies much higher frequencies (a disadvantage) but occupies much more spectrum.

Table 6-7. LMDS and MMDS Compared

	LMDS	MMDS
Frequency Range	28 GHz	2.5 GHz
Amount of Bandwidth	1150 MHz Block A 150 MHz Block B	198 MHz

Using just QPSK modulation, an LMDS Block A service provider can serve more than 2 GBps of traffic per transmitter ...