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   Articles with "spectral efficiency" as a keyword



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A modified topology achieved in OFDM/SAC-OCDMA-based multi-diagonal code for enhancing spectral efficiency

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recommendations! Published in 2018 at "Photonic Network Communications"

DOI: 10.1007/s11107-018-0796-2

Abstract: In this paper, a modified topology-based orthogonal frequency division multiplexing–spectral amplitude coding in optical code division multiple access (OFDM–SAC-OCDMA) has been introduced. Such analysis aims to explain the effect of spectral efficiency with respect to… read more here.

Keywords: sac ocdma; code; topology; spectral efficiency ... See more keywords
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Adaptive pilot decontamination in multi-cell massive MIMO networks

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recommendations! Published in 2017 at "Telecommunication Systems"

DOI: 10.1007/s11235-017-0302-7

Abstract: This paper considers the contaminated channel estimation in multicell very large multiuser multiple-input multiple-output networks. To provide desirable spectral efficiency of these systems, we propose two adaptive algorithms which their implementations do not require orthogonal… read more here.

Keywords: adaptive pilot; decontamination multi; pilot; spectral efficiency ... See more keywords
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Uplink Spectral Efficiency Analysis for a Massive MIMO Primary Network

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recommendations! Published in 2018 at "Wireless Personal Communications"

DOI: 10.1007/s11277-017-4875-y

Abstract: Faster development of smart electronic devices in recent years along with significant increase in demanding higher data rates has made cognitive radio networks (CRNs) to be taken into consideration as a promising technology. A CRN… read more here.

Keywords: spectral efficiency; primary network; uplink spectral; efficiency ... See more keywords
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Noncoherent Detection for Improving the Spectral Efficiency of OFDM-IM Systems

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recommendations! Published in 2020 at "Wireless Personal Communications"

DOI: 10.1007/s11277-020-07373-4

Abstract: Today, Orthogonal Frequency Division Multiplexing (OFDM) is the most preferred and commonly used scheme for all communication systems. A new multicarrier technique called OFDM with Index Modulation (OFDM-IM) has been developed recently where the indices… read more here.

Keywords: index; ofdm gim1; ofdm; spectral efficiency ... See more keywords
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Performance evaluation of fractional OFDM for extending transmission distance without reducing spectral efficiency

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recommendations! Published in 2019 at "Optics Communications"

DOI: 10.1016/j.optcom.2019.04.059

Abstract: Abstract The performance of a fractional orthogonal frequency division multiplexing (FrOFDM) system is examined considering spectral efficiency (SE). While FrOFDM can reduce peak-to-average power ratio, which is a drawback in OFDM, its bandwidth is expanded.… read more here.

Keywords: ofdm; spectral efficiency; distance without; transmission distance ... See more keywords
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Real-Time Maximum Spectral Efficiency for Massive MIMO and its Limits

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recommendations! Published in 2018 at "IEEE Access"

DOI: 10.1109/access.2018.2866094

Abstract: This paper evaluates the impact of spatially multiplexing an increasing number of users within a single-cell massive multiple-input, multiple-output (MIMO) system. The highest spectral efficiency (SE) of 145.6 bits/s/Hz achieved for any wireless system to… read more here.

Keywords: mimo; number users; massive mimo; number ... See more keywords
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Spectral Efficiency Maximization of a Single Cell Massive MU-MIMO Down-Link TDD System by Appropriate Resource Allocation

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recommendations! Published in 2019 at "IEEE Access"

DOI: 10.1109/access.2019.2959711

Abstract: This paper deals with the problem of maximizing the spectral efficiency in a massive multi-user MIMO downlink system, where a base station is equipped with a very large number of antennas and serves single-antenna users… read more here.

Keywords: system; downlink; resource allocation; efficiency ... See more keywords
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A Time-Delay Overlapping Modulation-Based High Spectral Efficiency and Secure DCSK System

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recommendations! Published in 2021 at "IEEE Access"

DOI: 10.1109/access.2021.3108808

Abstract: In this paper, a new high spectral efficiency differential-chaos-shift-keying system based on the time-delay overlapping modulation technology (TDOP-DCSK) is proposed. In this system, the binary bits are conveyed by multiple chaotic carriers which are delayed… read more here.

Keywords: spectral efficiency; system; dcsk; efficiency ... See more keywords
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Uplink Spectral Efficiency of Large, Distributed Antenna Systems With MMSE Processing

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3153045

Abstract: The spectral efficiency of a representative uplink in a wireless network with spatially distributed antennas and linear minimum-mean-square-error processing is found to approach an asymptote with a simple form as the number of antennas increases.… read more here.

Keywords: efficiency large; distributed antenna; spectral efficiency; uplink spectral ... See more keywords
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Research on Spectrum Needs Prediction Method for HAPS as IMT Base Station

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3220839

Abstract: The High-Altitude Platform Station (HAPS) is an integral component in Non-Terrestrial Network (NTN) which is potential 6G technology. The HAPS as IMT Base Stations (HIBS) in the mobile service is an emerging and promising approach… read more here.

Keywords: hibs; spectrum needs; spectral efficiency; capacity ... See more keywords
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A Single-Carrier Delay-and-Superposition Based High Spectral Efficiency Differential Chaos Shift Keying for Maritime Internet of Vessels

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3227625

Abstract: 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… read more here.

Keywords: efficiency differential; spectral efficiency; scds dcsk; efficiency ... See more keywords