Формування та обробка сигналів багатоканальних систем передачі даних з розподілом каналів за потужністю

Abstract

This master's thesis deals with the basic methods of multiplication of access OMA (Orthogonal Multiple Access - orthogonal multiple access method) and NOMA (Non orthogonal Multiple Access - non-orthogonal multiple access method). The theoretical analysis, the method of non-orthogonal multiple access PD NOMA, the comparison of the noise immunity characteristics of OFDM and PD NOMA, the complexity and problems of PD-NOMA technology implementation in mobile communication systems are shown. The PD-NOMA channel partial power calculations were performed and two partial power calculation methods were proposed to provide the partial power with the required channel bandwidth and without the required channel bandwidth. An experimental study of the noise immunity of the PD-OFDMA communication channel under real radio propagation conditions for the three scenarios also made an estimation of the frequency response for the PPB channel. In the course of the master's thesis it was found that the systems not orthogonal to the multiple access PD-OFDMA are more efficient than the orthogonal OFDMA method due to a more efficient allocation of energy and frequency-time resources. Keywords: multiple access, orthogonal method, non-orthogonal method, partial power, noise immunity, propagation of radio waves, frequency-time resources