Методи підвищення завадозахищеності від навмисних перешкод

Abstract

This work describes the main methods of enhancing the interference immunity of the radio signal from intentional interference, aiming by frequency. Attention will be paid to technical methods. Using of a pseudorandom adjustment of the operating frequency, is a frequent change in frequency that occurs under a pseudorandom law, known by a transmitter and receiver. Another way is to dynamically expanding the spectrum of the transmitted signal. Each transmitted bit of information is represented as a sequence of a certain number of code symbols. Significant distribution has gained a way to increase noise immunity based on the use of directed antennas. The last described method will be the "power" method.