Алгоритм гибкого управления множественным доступом в мобильной беспроводной системе 5G

Although the specific technical standard of 5G has not been formulated yet at present.  However, spectrum efficiency will be a key developing direction for 5G wireless communication system from the research results which released by major international organizations. From this point of view, the nonorthogonal multiple access algorithm (NOMA) can satisfy both the demand rate and the spectral efficiency of mobile services.С развитием технологий мобильной связи ресурсов беспроводного спектра становится недостаточно. Исследователи ищут новые технологии мобильной связи, которые будут не только отвечать ожиданиям пользователей, но и улучшат эффективность беспроводного спектра. Ключевые технологии исследования беспроводной сети следующего поколения основаны на сложных алгоритмах управления множественным доступом на физическом уровне. В статье предлагается новый алгоритм гибкого множественного доступа (неортогонального множественного доступа, НОМД), анализируется производительность системы для НОМД восходящей линии связи с усовершенствованным приемником последовательного подавления помех, применяемым на стороне базовой станции. С помощью Matlab показывается, что производительность системы, достигнутая в НОМД, выше на 30 % по сравнению с системой ортогонального множественного доступа

Improved IDMA for Multiple Access of 5G

Due to its good performance and low complexity, IDMA is believed to be an important technique for future radio access (FRA). However, its performances are highly affected by the interleaver design. In this paper we propose two contributions to improve the performance of the IDMA. First, we propose a new interleaver design, called "NLM interleaver", which improves the computational complexity, reduces the bandwidth consumption and the memory requirements of the system, provides the quasi-orthogonal spreading codes and interleavers with a high security and offers infinite sets of codes and interleavers based on only one parameter. Second, we propose a new user grouping algorithm based on the correlation function to improve the resources (Codes, Interleavers). All users are divided into several equal-size groups where each group's data transmitted at the same time, over the same frequencies and the same interleaver. The simulation results indicate that the proposed scheme can achieve better performances compared to the existing algorithms

D3.2 First performance results for multi -node/multi -antenna transmission technologies

This deliverable describes the current results of the multi-node/multi-antenna technologies investigated within METIS and analyses the interactions within and outside Work Package 3. Furthermore, it identifies the most promising technologies based on the current state of obtained results. This document provides a brief overview of the results in its first part. The second part, namely the Appendix, further details the results, describes the simulation alignment efforts conducted in the Work Package and the interaction of the Test Cases. The results described here show that the investigations conducted in Work Package 3 are maturing resulting in valuable innovative solutions for future 5G systems.Fantini. R.; Santos, A.; De Carvalho, E.; Rajatheva, N.; Popovski, P.; Baracca, P.; Aziz, D.... (2014). D3.2 First performance results for multi -node/multi -antenna transmission technologies. http://hdl.handle.net/10251/7675