CONTENTS

 1 Introduction
 2 Non-adaptive systems
        2.1 Introduction
        2.2 Propagation
 3 Adaptive systems
        3.1 Introduction
        3.2 Operational characteristics
                  3.2.1 General description
                  3.2.2 Frequency management and link quality assessment
                  3.2.3 Sounding
                  3.2.4 Link preparation and establishment
                  3.2.5 Link maintenance and disconnection
        3.3 Waveform characteristics
                  3.3.1 2G ALE waveform
                  3.3.2 3G ALE waveform suite
        3.4 Techniques to increase data speed
                  3.4.1 Independent sideband operation
                  3.4.2 Operation in noncontiguous channels