Keyword: «noise immunity»

The necessity of providing interference-proof radio communication between helicopter crews with other helicopters and with ground control points is shown. The features of configuring the communication means of modern helicopters to conduct protected radio exchange modes are listed.

The noise immunity of on-board communication complexes using phase-manipulated broadband signals is analyzed under the action of various interferences, taking into account changes in the signal spectrum expansion coefficient. Analytical expressions are given for calculating the probability of error per bit when receiving broadband signals against the background of interference.

The analysis of the noise immunity of on-board communication means using the mode of program adjustment of the operating frequency, under the action of various interferences, taking into account the change in the signal spectrum expansion coefficient, is carried out. Analytical expressions are given for calculating the probability of error per bit when receiving signals with coherent and incoherent processing against the background of interference.