Results 21 to 30 of about 193,376 (261)
Spectral efficiency of spectrum-pooling systems [PDF]
IET Communications, 2008 In this contribution, we investigate the idea of using cognitive radio to reuse locally unused spectrum to increase the total system capacity. We consider a multiband/wideband system in which the primary and cognitive users wish to communicate to different receivers, subject to mutual interference and assume that each user knows only his channel and ...
Majed Haddad +2 more
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IEEE Access, 2018 In this paper, we investigate the resource allocation problem for achieving spectral efficiency (SE) and energy efficiency (EE) tradeoff with users' minimum rate requirements in hybrid multi-carrier non-orthogonal multiple access (MC-NOMA) systems which ...
Zhengyu Song, Qiang Ni, Xin Sun
doaj +1 more source
IEEE Access, 2019 To fully utilize the system resources and enhance the user experience, two types of offloading mechanisms are designed for massive MIMO (multiple-input-multiple-out) enabled heterogeneous cellular networks (HCNs).
Tianqing Zhou +6 more
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A Comprehensive Performance Evaluation of Universal Filtered Multi-Carrier Technique
IEEE Access, 2019 The Internet of Things (IoT) and machine-to-machine (M2M) communication will play an important role in future communications, but there is currently no ultra-reliable low-latency wireless communication theory that guides its design.
Shanlin Wei +3 more
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IEEE Access, 2022 The fast growing Internet of Vessels (IoV) requires maritime communications to be more spectral efficient to make full use of the scarce maritime spectral resource, provide a high data transmission rate and support massive communication nodes to access ...
Xinyu Dou +3 more
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ON THE SPECTRAL EFFICIENCY OF A SPHERE [PDF]
Progress In Electromagnetics Research, 2007 In many cases it is desired to have both high capacity and small antennas in wireless communication systems. Unfortunately, the antenna performance deteriorate when the antennas get electrically small. In this paper fundamental limitations from antenna theory and broadband matching are used to analyze the spectral efficiency of an arbitrary antenna ...
Mats Gustafsson, Sven Nordebo
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IEEE Access, 2020 This paper analyzes the performance of the full-duplex (FD) multiple-input-multiple-output (MIMO) decode-and-forward (DF) relay system in the presence of self-energy recycling (S-ER). Specifically, this work proposes an antenna allocation scheme for S-ER
Mohd Hamza Naim Shaikh +2 more
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SCMA Spectral and Energy Efficiency With QoS [PDF]
IEEE Access, 2021 Sparse code multiple access (SCMA) is one of the promising candidates for new radio access interface. The new generation communication system is expected to support massive user access with high capacity. However, there are numerous problems and barriers to achieve optimal performance, e.g., the multiuser interference and high power consumption.
S. Jaber, W. Chen, K. Wang
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IEEE Access, 2022 In this paper, it is proposed to enhance coherent optical orthogonal frequency-division multiplexing (OFDM) system by using index modulation in terms of bit error rate (BER) and spectral efficiency for different levels of the fiber nonlinearity.
Ahmet Guner
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Joint Processing of Pilot and Data for Massive MIMO Systems in Ricean Fading Channels
IEEE Access, 2019 Besides the pilot symbols, the received data signals also contain some extra channel state information (CSI), which can be exploited to further improve the channel estimation accuracy.
Yuanxue Xin +5 more
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