DEVICE OF SPEECH ACOUSTIC SIGNAL PROTECTION IN THE CONDITIONS OF RADIO ELECTRONIC WARFARE

Abstract

The article considers the issue of speech information, which is transmitted over the communication channel in the conditions of modern threats, particularly signal interception, unauthorized access and analysis of acoustic signals. An additional device for radio stations is proposed, which provides an increased level of speech signal protection due to its digital conversion, encryption and modification of acoustic characteristics. The basic principle of operation of the device is to convert the acoustic signal into digital using the analog-to-digital converter, further encryption and insertion of synchronizing signals into the speech stream. It allows to ensure exact and correct information recovery in the receiver. After processing, the digital signal is converted back into analog and fed to the telephone capsule, which affects the radio station microphone, ensuring the transmission of a protected speech signal over the radio channel. In the conditions of electronic warfare, the proposed device provides high efficiency due to the complexity of the process of analyzing the speech signal in the event of its interception through the communication channel. The presence of synchronization signals in the digital stream will allow to reduce the influence of interference and ensure correct renovation of the speech signal in the receiver. The analysis is given and the expediency of using Barker codes as cyclic synchronization signals is proven. Structural schemes of speech signal conversion devices are developed. The purpose of the work is to develop and analyse an additional device for radio station that provides increased level of speech signal protection by digital conversion, encryption, and the use of synchronization signals for correct reception and recovery of information.