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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Proceedings ArticleDOI
Transmit Diversity Scheme over Single SC-FDM Symbol for LTE-Advanced
TL;DR: A novel transmission scheme is proposed: "One Symbol STBC" that operates on a single SC-FDM symbol and can achieve full transmit diversity while maintaining single-carrier waveform's low PAPR.
Proceedings ArticleDOI
Performance evaluation of OFDMA femtocells link-layers in uncontrolled deployments
TL;DR: This work focuses on typical 4G cases, with an orthogonal frequency-division multiple access (OFDMA) physical layer and full frequency reuse, and shows that without any interference management, system performance is significantly degraded and that complete outages occur in specific cases.
Journal ArticleDOI
Raised Cosine-Like Companding Scheme for Peak-to-Average Power Ratio Reduction of SCFDMA Signals
TL;DR: This paper proposes a Raised Cosine-like companding scheme to reduce the peak-to-average power ratio (PAPR) of SCFDMA signals and shows that this scheme can offer better PAPR reduction by properly choosing the parameters.
Patent
Technique for peak power reduction
TL;DR: In this paper, a peak power reduction technique for a transmitter stage configured to map a set of input symbols onto the set of orthogonal subcarriers to generate a modulated signal is proposed.
Proceedings ArticleDOI
Uplink resource allocation algorithms with fractional power control as power constraints for OFDMA system
TL;DR: From the simulation results, it is shown that the proposed algorithms can improve the sum of spectral efficiency and fairness among users in macrocell urban and suburban condition.
References
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Zhu Han,Ji Zhu,K.J.R. Liu +2 more
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