Evaluation of Additive White Gaussian Noise Influence on the Energy Stealthiness of Complex Signals

Abstract

While designing special-purpose radio communication systems, it is important to take into account the work of potential adversaries or intruders who have electronic warfare and electronic countermeasure, whose task is to disrupt radio communications or intercept transmitted messages. Today, a number of methods are known to counteract electronic warfare, the main of them are aimed to avoid destructive influences of radio warfare. In this area, the issue of creating “uncompromising” radio transmitting devices is promising. The term “incompromising” means that a radio transmitting device is capable of transmitting a covert signal in such a way that the enemy's electronic warfare equipment could not fixate the broadcast. The secrecy of the signal is ensured by a set of technical and organizational measures. When studying secrecy issues, the greatest attention is paid to energy secrecy, since this component mainly depends on design decisions at the design stage. The article deals with the problem of obtaining an estimate of the influence of AWGN on the probability of correct signal transmission. The influence of noise and interference is considered as an important element of electronic warfare and countering enemy electronic warfare. The purpose of the article is to study the effect of noise on the degree of energy secrecy of signals. The influence of AWGN and phase noise for BPSK, QPSK, QAM-16 and chirp signals has been evaluated. Based on the results, some regularities are described that make it possible to evaluate the effect of AWGN and phase noise on the noise immunity of these signals. Studies of the chirp signal on the degree of energy secrecy under the influence of noise have been carried out. As a result of the study, conclusions were drawn about the influence of external noise on the degree of energy secrecy of signals, the chirp signal was recognized as potentially suitable for use in special communication systems.