Wyniki wyszukiwania - Biblioteka Nauki

1

Selected aspects of non-orthogonal multiple access for future wireless communications – for IoT

100%

Wysocki T. A. , Flizikowski A. , Marciniak T.

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tom nr 24

45--65

EN

This paper has provided an overview of selected IoT architectures, relevant requirements towards 5G (and beyond) systems as well as indication of NOMA techniques suitability as a multiple access technique and recent developments in the area of radio interface for IoT coexisting with 5G (and beyond) mobile networks. The authors assume that IoT networks in the future will be augmented with NOMA-capable sink-nodes (proxy or gateway) that can deliver aggregated data from multiple sensors for delivery to the cloud or other server. The main aim of this paper is to go beyond state of the art available nowadays and indicate directions for NOMA that make it even more attractive in combination with edge computing, cloud-RAN and especially AI/ML to improve future 6G networks.

2

Nieortogonalna metoda dostępu wielokrotnego dla systemów następnych generacji

89%

Gajewska M.

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tom nr 6

202--2015, CD

PL

W artykule zaprezentowano nieortogonalną, metodę dostępu wielokrotnego do kanału, nazywaną w skrócie metodą NOMA, która jest prawdopodobna do zastosowania w systemach 5G. Porównano ją z dotychczas powszechnie stosowanymi metodami ortogonalnymi OMA. Analizę przeprowadzono dla łącza w dół i łącza w górę.

EN

In the article a non-orthogonal multiple access method called NOMA is presented. This method is planned for use in 5G systems. The NOMA is compared with groups orthogonal methods named OMA which are currently used. This analysis was performed both for downlink and uplink.

3

„Podwójna gra”. O przydatności koncepcji NOMA w socjologii religii

89%

Rogińska M.

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nr 2(200)

89-103

PL

Artykuł jest poświęcony poznawczej sytuacji wierzącego badacza religii, którego przynależność zarówno do świata nauki, jak i do świata wiary, Peter Berger nazywa podwójnym obywatelstwem, zaś Pierre Bourdieu podwójną grą. Autor zastanawia się, czy do sytuacji tej można zastosować koncepcję rozłącznych obszarów dociekań (ang. non-overlaping magisteria, NOMA), która powstała jako model współistnienia religii i nauk przyrodniczych.

EN

The objective of this paper is to analyze the situation of a believing sociologist of religion. It is her affiliation to the both scientific and religious world that Peter Berger calls “the dual citizenship” and Pierre Bourdieu – “the double game”. The author investigates whether the non-overlaping magisteria (NOMA) concept proposed by Stephen Gould as a model of coexistence of religion and natural sciences can be applied to the situation of the social researcher of religion.

4

An Approximate Evaluation of BER Performance for Downlink GSVD-NOMA with Joint Maximum-likelihood Detector

75%

Hai N. T. , Khoa D. L.

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tom nr 3

25--37

EN

Generalized Singular Value Decomposition (GSVD) is the enabling linear precoding scheme for multiple-input multiple-output (MIMO) non-orthogonal multiple access (NOMA) systems. In this paper, we extend research concerning downlink MIMO-NOMA systems with GSVD to cover bit terror rate (BER) performance and to derive an approximate evaluation of the average BER performance. Specifically, we deploy, AT the base station, the well-known technique of joint-modulation to generate NOMAsymbols and joint maximum-likelihood (ML) to recover the transmitted data at end user locations. Consequently, the joint ML detector offers almost the same performance, In terms of average BER as ideal successive interference cancellation. Next, we also investigate BER performance of other precoding schemes, such as zero-forcing, block diagonalization, and simultaneous triangularization, comparing them with GSVD. Furthermore, BER performance is verified in different configurations in relation to the number of antennas. In cases where the number of transmit antennas is greater than twice the number of receive antennas, average BER performance is superior.

5

Full-duplex Cognitive Radio NOMA Networks : Outage and Throughput Performance Analysis

75%

Tran T.-N. , Do D.-T. , Voznak M.

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2019

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tom Vol. 65, No. 1

103--109

EN

A novel non-orthogonal multiple access (NOMA) scheme is proposed to improve the throughput and the outage probability of the cognitive radio (CR) inspired system which has been implemented to adapt multiple services in the next-generation network (5G). In the proposed scheme, the primary source (PS) had sent a superposition code symbol with a predefined power allocation to relays, it decoded and forwarded (DF) a new superposition coded symbol to the destination with the other power allocation. By using a dual antenna at relays, it will be improved the bandwidth efficiency in such CR NOMA scheme. The performance of the system is evaluated based on the outage probability and the throughput with the assumption of the Rayleigh fading channels. According to the results obtained, it is shown that the outage probability and throughput of the proposed full-duplex (FD) in CR-NOMA with reasonable parameters can be able deploy in practical design as illustration in numerical results section.

6

Analysis of an LSTM-based NOMA Detector Over Time Selective Nakagami-m Fading Channel Conditions

63%

Shankar R. , Bangare J. L. , Kumar A. , Gupta S. , Mehraj H. , Kulkarni S. S.

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tom nr 3

17--24

EN

This work examines the efficacy of deep learning (DL) based non-orthogonal multiple access (NOMA) receivers in vehicular communications (VC). Analytical formulations for the outage probability (OP), symbol error rate (SER), and ergodic sum rate for the researched vehicle networks are established Rusing i.i.d. Nakagami-m fading links. Standard receivers, such as least square (LS) and minimum mean square error (MMSE), are outperformed by the stacked long-short term memory (S-LSTM) based DL-NOMA receiver. Under real time propagation circumstances, including the cyclic prefix (CP) and clipping distortion, the simulation curves compare the performance of MMSE and LS receivers with that of the DL-NOMA receiver. According to numerical statistics, NOMA outperforms conventional orthogonal multiple access (OMA) by roughly 20% and has a high sum rate when considering i.i.d. fading links.