Energy‐spectral efficiency trade‐off optimization for downlink multi‐user non orthogonal multiple access systems

2021 ◽  
Vol 34 (8) ◽  
Author(s):  
Naziha Glei ◽  
Jalel Ben Othman ◽  
Rhaimi Belgacem Chibani
Keyword(s):  
Spectral Efficiency ◽  
Multiple Access ◽  
Trade Off

scholarly journals Interrelationship between Energy Efficiency and Spectral Efficiency in Cognitive Femtocell Networks: A Survey

2021 ◽  
Author(s):  
Joydev Ghosh
Keyword(s):  
Energy Efficiency ◽  
Wireless Networks ◽  
Spectral Efficiency ◽  
Multiple Access ◽  
State Of The Art ◽  
Femtocell Networks ◽  
Design Guideline ◽  
Trade Off ◽  
Potential Impact ◽  
Cognitive Femtocell

<div>In this paper, we initially dealt with the issue of spectrum allocation among macro (or “licensed”) and Femto (or “unlicensed”) users in an Orthogonal Frequency Devision Multiple Access (OFDMA) based dual-layer femtocell networks. This research contribution will lead to basic coin in the design of next generation (5G) wireless networks. This manuscript exemplifies the trade off issue of energy efficiency (EE) and spectral efficiency (SE) with both cooperative and non-cooperative architecture in cognitive femtocell networks. The pivotal concepts for each technology are described, along with their potential impact on 5G and the research challenges that remain. Further, the trade-off between EE and SE is reposed with respect to the state of the art. The obtained insightful observations from the trade-off analysis of EE ans SE can lead to provide design guideline for 5G wireless Networks.</div>

scholarly journals Interrelationship between Energy Efficiency and Spectral Efficiency in Cognitive Femtocell Networks: A Survey

2021 ◽  
Author(s):  
Joydev Ghosh
Keyword(s):  
Energy Efficiency ◽  
Wireless Networks ◽  
Spectral Efficiency ◽  
Multiple Access ◽  
State Of The Art ◽  
Femtocell Networks ◽  
Design Guideline ◽  
Trade Off ◽  
Potential Impact ◽  
Cognitive Femtocell

<div>In this paper, we initially dealt with the issue of spectrum allocation among macro (or “licensed”) and Femto (or “unlicensed”) users in an Orthogonal Frequency Devision Multiple Access (OFDMA) based dual-layer femtocell networks. This research contribution will lead to basic coin in the design of next generation (5G) wireless networks. This manuscript exemplifies the trade off issue of energy efficiency (EE) and spectral efficiency (SE) with both cooperative and non-cooperative architecture in cognitive femtocell networks. The pivotal concepts for each technology are described, along with their potential impact on 5G and the research challenges that remain. Further, the trade-off between EE and SE is reposed with respect to the state of the art. The obtained insightful observations from the trade-off analysis of EE ans SE can lead to provide design guideline for 5G wireless Networks.</div>

Subcarrier and Power Allocation Algorithm for Spectral Efficiency Maximization in Superposition Coding OFDMA Systems

2015 ◽  
Vol 24 (05) ◽  
pp. 1550061
Author(s):  
Mateus de Paula Marques ◽  
Taufik Abrão
Keyword(s):  
Power Allocation ◽  
Spectral Efficiency ◽  
Time Complexity ◽  
Multiple Access ◽  
Optimization Problem ◽  
Frequency Division ◽  
Superposition Coding ◽  
Ofdma System ◽  
Transmission Strategy ◽  
Throughput Gain

This paper addresses the optimization problem on subcarrier and power allocation of orthogonal frequency division multiple access (OFDMA) system under spectral efficiency (SE) metric when deploying superposition coding (SC) transmission strategy. An algorithm with polynomial time complexity, of the order of (UN log 2(N)) has been proposed for sub-optimal SE maximization. Results indicate that the system SE increases with the use of SC technique. Besides, the throughput gain with SC adoption increases when the number of users (U) approaches the number of subcarriers (N) available in the system.

Optimal Energy to Spectral-Efficiency Trade-off in Cooperative Networks

2015 ◽  
Vol 82 (3) ◽  
pp. 1547-1566 ◽  
Author(s):  
Chunguo Li ◽  
Wei-Ping Zhu ◽  
Luxi Yang
Keyword(s):  
Spectral Efficiency ◽  
Cooperative Networks ◽  
Trade Off ◽  
Optimal Energy
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