CONTENTS

Annex  1 - Effects of multipath propagation on design and operation of line-of-sight digital FWSs
 1     Introduction
 2     Propagation considerations
 3     Countermeasures to propagation effects
        3.1     Diversity techniques
                  3.1.1     Space diversity
                  3.1.2     Frequency diversity
        3.2     Adaptive channel equalization
                  3.2.1     Frequency domain equalization
                  3.2.2     Time domain equalization
                  3.2.3     Performance improvement factors
        3.3     Adaptive equalization in combination with space-diversity combining
        3.4     System design considerations in the presence of propagation ducts
 4     Calculation of outage probabilities
        4.1     Fade margin methods
        4.2     Signature curve methods
                  4.2.1     Measurement of signatures
                  4.2.2     Normalized system parameter (Kn)