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
Quasi-Cyclic Symbol Extensions for Shaping the OFDM Spectrum
TL;DR: A new class of quasi-cyclic symbol extensions is proposed, which makes the OFDM system more continuous, which leads to low OOB emission while the additive interference is less than other $N$ -continuous OFDM systems.
Proceedings ArticleDOI
HARQ throughput enhancement using maximum likelihood block detection with recursive QR packet combining and M-algorithm for single-carrier MIMO
TL;DR: This paper considers a single-carrier MIMO and proposes a maximum likelihood block detection using recursive QR packet combing and M-algorithm called recursive QRM-MLBD, and shows it provides a better throughput performance than the conventional bit-level log likelihood ratio (LLR) packet combining.
Journal ArticleDOI
A multi-user linear equalizer for uplink broadband millimeter wave massive MIMO
TL;DR: The simulation results show that the performance gap between the proposed hybrid broadband multiuser equalizer and full digital equalizer decreases monotonically and exponentially with the number of RF chains until reaching zero, and the gap decay rate is faster for sparser mmWave channels, where fewer RF chains are required to achieve the same performance of the full digital architecture.
Dissertation
Interference Modelling and Analysis of OFDM in Wireless Environments
TL;DR: This thesis presents an analysis into the error rate performance of OFDM-based wireless networks in the presence of multiple interferers as well as a performance comparison with DS-SS wireless systems under identical environmental conditions.
QoS Performance Evaluation of Video Conferencing over LTE
TL;DR: This master’s thesis is to analyze the quality of service (QoS) performance and its effects when video is streamed over a GBR (Guaranteed bit rate) and non-GBR bearers over LTE.
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.
Journal ArticleDOI
Frequency domain equalization for single-carrier broadband wireless systems
TL;DR: This article surveys frequency domain equalization (FDE) applied to single-carrier (SC) modulation solutions and discusses similarities and differences of SC and OFDM systems and coexistence possibilities, and presents examples of SC-FDE performance capabilities.
Journal ArticleDOI
Transmission techniques for digital terrestrial TV broadcasting
TL;DR: The authors discuss the potential of OFDM signaling, with its limitations and inherent problems, as well as another potential technique that has so far been overlooked: single-carrier transmission with frequency- domain equalization, and introduces coded-OFDM (COFDM), which makes use of channel coding and frequency-domain interleaving.
Journal ArticleDOI
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
Technical solutions for the 3G long-term evolution
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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