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
Uplink scheduling in LTE systems using distributed base stations
Elias Yaacoub,Zaher Dawy +1 more
TL;DR: 3GPP, 2006, 25814 3GPP TR; *ALC LUC, 2008, ALC LUC UNV 3G CDMA; *alC L UC, 2008; ALCLUC EXP 3G W CDM; [Anonymous], 2008, 36213 3G PP TS.
Patent
Method and apparatus for high speed data transmission modulation and demodulation
TL;DR: In this paper, a method and apparatus for communicating wirelessly comprising creating a plurality of sub-carrier signals by quadrature amplitude modulating data onto the subcarrier frequencies spaced apart by a subcarriers frequency spacing interval was proposed.
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Multicarrier Spread Spectrum Modulation Schemes and Efficient FFT Algorithms for Cognitive Radio Systems
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Proceedings ArticleDOI
Performance aspects of LTE uplink with variable load and bursty data traffic
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TL;DR: Simulation results demonstrate that in low load conditions applying no PC (or alternatively using fractional PC) can provide significant gains compared to full compensation PC, but when also considering medium-to-high load conditions fractionalPC can guarantee the best trade-off between peak data rates and cell edge performance.
Proceedings ArticleDOI
Fairness-based adaptive QoS scheduling for LTE
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TL;DR: An Adaptive Modified Largest Weighted Delay First (AMLWDF) formula, which considers delay time, instantaneous transmission rate, average Transmission rate, delay constraints, QCI priority, and fairness at the same time, is designed.
References
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Transmission techniques for digital terrestrial TV broadcasting
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