METHOD OF INCREASING THE RANGE, ESPECIALLY IN RESPECT OF ANTI-JAMMING IN AN MLS LANDING SYSTEM, AND DEVICES USING THE SAME

摘要

A process and means for increasing the range and the protection against jamming of a MLS system. It consists of transmitting a supplementary or reinforced preamble for each MLS function or group of MLS functions, via a scanning antenna used for the azimuth function, during the time when the latter is not normally used. This supplementary preamble consists of a certain number, e.g. four preferably accelerated scans, the variation between these scans being characteristic of the following function or functions.