Journal ArticleDOI
Single carrier FDMA for uplink wireless transmission
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TLDR
Among the possible subcarrier mapping approaches, it is found that localizedFDMA (LFDMA) with channel-dependent scheduling (CDS) results in higher throughput than interleaved FDMA (JFDMA), however, the PARR performance of IFDMA is better than that of LFDMA.Abstract:
Single carrier frequency division multiple access (SC FDMA), a modified form of orthogonal FDMA (OFDMA), is a promising technique for high data rate uplink communications in future cellular systems. SC-FDMA has similar throughput performance and essentially the same overall complexity as OFDMA. A principal advantage of SC-FDMA is the peak-to-average power ratio (PARR), which is lower than that of OFDMA. SC FDMA is currently a strong candidate for the uplink multiple access scheme in the long term evolution of cellular systems under consideration by the third generation partnership project (3GPP). In this paper, we give an overview of SC-FDMA. We also analyze the effects of subcarrier mapping on throughput and PARR. Among the possible subcarrier mapping approaches, we find that localized FDMA (LFDMA) with channel-dependent scheduling (CDS) results in higher throughput than interleaved FDMA (JFDMA). However, the PARR performance of IFDMA is better than that of LFDMA. As in other communications systems there are complex tradeoffs between design parameters and performance in an SC-FDMA systemread more
Citations
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Journal ArticleDOI
Machine Learning Empowered Resource Allocation in IRS Aided MISO-NOMA Networks
TL;DR: In this paper , a novel framework of intelligent reflecting surface (IRS)-aided multiple-input single-output (MISO) non-orthogonal multiple access (NOMA) network is proposed, where a base station (BS) serves multiple clusters with unfixed number of users in each cluster.
Journal ArticleDOI
Adaptive Beamforming Applied to OFDM Systems.
TL;DR: An adaptive beamforming scheme applied to time domain, pre-FFT (Fast Fourier Transformation), Orthogonal Frequency-Division Multiplexing (OFDM) systems is proposed, which allows a significant reduction in the guard interval of the OFDM system, thereby increasing its robustness or transmission capacity.
Journal ArticleDOI
Sensitivity Analysis of OFDMA and SC-FDMA Uplink Systems to Carrier Frequency Offset
TL;DR: This paper studies and compares OFDMA and SC-FDMA in terms of sensitivity to carrier frequency offset (CFO) in the uplink and proves that the derived expressions for both systems are reduced to very simple forms in interleaved subcarrier allocation.
Proceedings ArticleDOI
Mobile radio channels' estimation for SC-FDMA systems by means of adequate noise and inter-carrier interference filtering in a transformed domain
TL;DR: A new channel estimation technique for mobile radio multipath channels in the context of SC-FDMA1, based on the variation rate of the channel's frequency response and the nature of the noise and ICI component in the Transformed domain is proposed.
Proceedings ArticleDOI
A multiuser subcarrier and power allocation scheme in localized SC-FDMA systems
TL;DR: A novel allocation scheme to solve a subcarrier and power allocation problem for multiuser SC-FDMA uplink systems with a localized subcarriers mapping mode and results show that the proposed scheme outperforms the existing schemes.
References
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Book
OFDM for Wireless Multimedia Communications
Richard van Nee,Ramjee Prasad +1 more
TL;DR: In this paper, the authors present a comprehensive introduction to OFDM for wireless broadband multimedia communications and provide design guidelines to maximize the benefits of this important new technology, including modulation and coding, synchronization, and channel estimation.
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Frequency domain equalization for single-carrier broadband wireless systems
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Transmission techniques for digital terrestrial TV broadcasting
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Fair multiuser channel allocation for OFDMA networks using Nash bargaining solutions and coalitions
Zhu Han,Ji Zhu,K.J.R. Liu +2 more
TL;DR: The proposed algorithms not only provide fair resource allocation among users, but also have a comparable overall system rate with the scheme maximizing the total rate without considering fairness, and have much higher rates than that of the scheme with max-min fairness.
Journal ArticleDOI
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Hannes Ekström,Anders Furuskär,Jonas Karlsson,Michael Meyer,Stefan Parkvall,Johan Torsner,M. Wahlqvist +6 more
TL;DR: Promising technologies to fulfil 3G evolution targets are presented, including OFDM, multi-antenna solutions, evolved QoS and link layer concepts, and an evolved architecture, indicating that the requirements can indeed be reached using the proposed technologies.
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