Book ChapterDOI
An Analysis of OFDMA, Precoded Ofdma and SC-FDMA for the Uplink in Cellular Systems
Cristina Ciochina,Cristina Ciochina,David Mottier,Hikmet Sari +3 more
- pp 25-36
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TLDR
The spectrum and performance analysis confirm the benefits of SC-FDMA in terms of both high-power amplifier (HPA) output back-off and bit error rate (BER) performance on selective channels.Abstract:
Orthogonal Frequency Division Multiple Access (OFDMA) appears today as a strong candidate in on-going standardization. Despite its attractive features, it has several drawbacks when employed in the uplink: The high peak-to-average power ratio (PAPR) inherited from Orthogonal Frequency Division Multiplexing (OFDM) and the inherent frequency diversity loss. The loss of frequency diversity can be combated by precoding. Variants of Precoded OFDMA include Spread Spectrum Multi-Carrier Multiple Access (SS-MC-MA) and the frequency-domain implementation of single-carrier (SC) FDMA called DFT-Spread OFDM. The latter transforms OFDMA into a SC transmission system, avoiding the PAPR problem. SC-FDMA with uniformly spaced carriers can be also generated by time-domain processing, a technique known as Interleaved Frequency Division Multiple Access (IFDMA). This paper analyzes OFDMA, several variants of Precoded OFDMA as well as SC-FDMA in its time- and frequency-domain implementations and compares them for uplink transmission. The spectrum and performance analysis confirm the benefits of SC-FDMA in terms of both high-power amplifier (HPA) output back-off and bit error rate (BER) performance on selective channels.read more
Citations
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Journal ArticleDOI
Low complexity PAPR reduction methods for carrier-aggregated MIMO OFDMA and SC-FDMA systems
Pochun Yen,Hlaing Minn +1 more
TL;DR: For the proposed phase-rotation based PAPR reduction methods, a reliable phase rotation detector at the receiver is developed to maintain the receiver performance and performance evaluation under 3GPP LTE-Advanced environment shows the advantage of the proposed methods while not requiring any signaling overhead.
Proceedings ArticleDOI
Comparative evaluation of OFDMA and SC-FDMA based transmission systems
TL;DR: In this paper, a general comparison of both conventional OFDMA and Single Frequency Division Multiplex (SC-FDMA) is presented, and the authors draw important conclusions from this comparison.
Journal ArticleDOI
Zadoff–Chu Matrix Transform Precoding-Based Orthogonal Frequency Division Multiple Access Uplink Systems: A Peak-to-Average Power Ratio Performance
Imran Baig,Varun Jeoti +1 more
TL;DR: In this article, two new Zadoff-Chu matrix transform (ZCMT) precoding-based OFDMA uplink systems, ZCMT precoding based distributed OFDM uplink system with reduced peak-to-average power ratio (PAPR) are presented.
Journal ArticleDOI
On the PAPR Reduction in LTE-Advanced: Precoding-Based SLM–LOFDMA Uplink Systems
TL;DR: In this article, two precoding-based PAPR reduction techniques, Zadoff-chu and generalized chirp-like precoding, were proposed for localized OFDMA uplink systems, respectively, for the upcoming 3 GPP long-term evolution-advanced standard.
Patent
Low peak-to-average power ratio waveform design for frequency multiplexing of multiple streams
Park Seyong,Wei Zeng,Peter Gaal,Hao Xu,Huang Yi,Wang Renqiu,Akkarakaran Sony,Tao Luo,Ji Tingfang +8 more
TL;DR: In this paper, a user equipment (UE) may be configured with a transmission stream processor used to maintain a lower peak-to-average power ratio (PAPR) for uplink transmissions.
References
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Effects of HPA-Nonlinearity on a 4-DPSK/OFDM-Signal for a Digital Sound Broadcasting System.
TL;DR: In this paper, the influence of the nonlinear distortions introduced by the high power amplifier (HPA) of the transmitter is examined, and the degradation in power efficiency due to intermodulation effects and backoff operating, as well as spectral degradations are investigated.
Book ChapterDOI
Interleaved FDMA-a new spread-spectrum multiple-access scheme
TL;DR: A new spread-spectrum multiple- access scheme applicable for both the uplink and the downlink of a mobile radio communications system is proposed, which is termed "interleaved frequency-division multiple-access", which combines the advantages of spread-Spectrum and multicarrier transmission.
Book
Wireless flexible personalised communications : COST 259 : European co-operation in mobile radio research
TL;DR: This paper presents a meta-anatomy of the radio systems used in the search for extraterrestrial radio signals and some of the techniques used in this search have been described as “satellite-based”.
Journal ArticleDOI
Orthogonal frequency-division multiple access and its application to CATV networks
Hikmet Sari,Georges Karam +1 more
TL;DR: The results indicate that OFDMA is an attractive multiple access technique which offers increased robustness to narrowband interference, impulse noise, and other signal impairments which characterize typical CATV networks.
Proceedings ArticleDOI
A flexible spread-spectrum multi-carrier multiple-access system for multi-media applications
S. Kaiser,K. Fazel +1 more
TL;DR: This paper presents a novel multiple access scheme designed for mobile multi-media applications that exploits the advantages given by the combination of the spread-spectrum technique with multi-carrier modulation, known from multi- carrier code division multiple access (MC-CDMA) schemes.