The goal of the project is to develop the system solution, a combination of receiver unit, methods and algorithms in a form of software modules of the receiving path in the user terminal, where the radio signal is formed using the OFDM (Orthogonal Frequency-Division Multiplexing) technique, especially in the LTE (Long Term Evolution), 5G-NR (New Radio) and NB-IoT (Narrowband Internet of Things) radio interfaces. The main functionality of the software modules will be the ability to detect intentionally introduced interferences in the received radio signal (e.g. realization of a hidden transmission) or interferences coming from radiocommunication system itself. The software modules developed during the realization of the project will be responsible for the additional downlink radio signal processing, in addition to operations carried out during the reception of the synchronization signals, signals used for estimating the radio channel parameters and detection of the broadcast channel. The goal of performing the supplementary operations on the received radio signal is to increase the quality of the radio link, where the quality can be understood as the value of the packet error rate (PER) or by the time and efficiency regarding processes of the synchronization and resynchronization of the terminal with the base station. The described functionality extends the operational abilities of the terminals that use the LTE/5G-NR or the narrowband NB-IoT interfaces, especially considering the military applications of the LTE/5G-NR technology for communication in small operational headquarters and critical infrastructure as well. The usage of the project results can be seen in modifying the software of the user's terminal receiving path, which will not require changes in the hardware part of the leading software-defined terminals. The concept of “functions available as the software defined modules” is consistent with the trend in the modern radio communication solutions..