N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 9 - Wireless Systems and Technologies                                                                                 Slide 50 of 80                                                                                                    ________________

    Example - A MMDS System

                                    MMDS Hub

                                    Main System Transmitter

                                    Repeaters

                                    Subscribers

                                                                                                   ________________

A main system transmitter broadcasts directly to vicinity subscribers and to a repeater broadcasting to remote subscribers.

Repeaters are used in an MMDS when there is no possibility to establish line of site between the base station antenna and user network terminal antennas. A repeater is a transmitting/receiving complex including transmitting and receiving antennas, broadband amplifiers with filtering modules and feeder links.

At the subscriber end includes wall-mounted antenna, low-noise down converter and a receiver.