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Table of Contents:

Definition and Overview

1. LMDS Overview

2. Architectural Options

3. Wireless Links and Access Options

4. Modulation

5. System Capacity

6. Microwave Propagation Issues

7. Network Planning

8. Network-Node Equipment

9. Radio Frequency Equipment

10. Network Interface Equipment (Customer Premises)

11. Network Management

Self-Test

Glossary

PDF of this tutorial

Definition
Local multipoint distribution system (LMDS) is the broadband wireless technology used to deliver voice, data, Internet, and video services in the 25-GHz and higher spectrum (depending on licensing).

Overview
As a result of the propagation characteristics of signals in this frequency range, LMDS systems use a cellular-like network architecture, though services provided are fixed, not mobile. In the United States, 1.3 MHz of bandwidth (27.5 B 28.35 GHz, 29.1 B 29.25 GHz, 31.075 B 31.225 GHz, 31 B 31.075 GHz, and 31.225 B 31.3 GHz) has been allocated for LMDS to deliver broadband services in a point-to-point or point-to-multipoint configuration to residential and commercial customers. This tutorial details the underlying technology inherent in offering voice, data, Internet, and video services over LMDS through integration with the wireline environment.