CONTENTS

 1     Introduction
 2     Generation of intermodulation
        2.1     Intermodulation products due to discrete frequencies
        2.2     Intermodulation noise due to continuous frequency spectrum
 3     Mitigation techniques
        3.1     Suppression at transmitters
                  3.1.1     Transmitter architecture
                  3.1.2     Filtering
                  3.1.3     Linearization
        3.2     Site-shielding for inter transmitter intermodulation
                  3.2.2     Antenna pattern
        3.3     Other mitigation measures
                  3.3.1     Reduction of intermodulation products in receivers
                  3.3.2     Frequency arrangements
        3.4     Examples of intermodulation products generated on a radio site with FM and public mobile radio (PMR)
                  3.4.1      Intermodulation between FM transmitters
                  3.4.2      Intermodulation between PMR base station transmitters
                  3.4.3      Intermodulation at the input of the PMR base station
                  3.4.4      Intermodulation between FM and PMR transmitters
ANNEX  1
Mathematical description of the generation of intermodulation noise in the transmitter
 3     Example 2: A third order system