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OFDM: Principles and Challenges [PDF]
, 2009 The nature of future wireless applications demands high data rates. Naturally dealing with ever-unpredictable wireless channel at high data rate communications is not an easy task. The idea of multi-carrier transmission has surfaced recently to be used for combating the hostility of wireless channel and providing high data rate communications.
Marchetti, Nicola +3 more
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Performance of Turbo coded wireless link for SISO-OFDM, SIMO-OFDM, MISO-OFDM and MIMO-OFDM system
14th International Conference on Computer and Information Technology (ICCIT 2011), 2011In this paper, performance of a Turbo coded OFDM wireless link is evaluated in the presence of Rayleigh fading for SISO, SIMO, MISO and MIMO system. Data are encoded using turbo encoder then modulated by QPSK or 16 QAM or 64 QAM and further encoded using STBC, and the encoded data are split into n streams which are modulated by OFDM and simultaneously ...
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2011
The details of OFDM, the transmission scheme used in LTE, are described in this chapter. Basic aspects related to OFDM transmission, such as cyclic prefix insertion, FFT-based implementations, single-frequency-network operation, and selection of OFDM parameters are discussed.
Erik Dahlman +2 more
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The details of OFDM, the transmission scheme used in LTE, are described in this chapter. Basic aspects related to OFDM transmission, such as cyclic prefix insertion, FFT-based implementations, single-frequency-network operation, and selection of OFDM parameters are discussed.
Erik Dahlman +2 more
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Performance comparison between CI/OFDM and OFDM systems
2010 International Conference on Communications, Circuits and Systems (ICCCAS), 2010Carrier Interferometry Orthogonal frequency division multiplexing (CI/OFDM) has gained a great deal of attention recently because of its good bit error rate (BER) and low peak-to-average power ratio (PAPR) performance. In this paper, we investigate the performance of CI/OFDM based on a new implementation model for both zero forcing (ZF) and minimum ...
Jun Wang, Pei Gao, Hui Hao, Shaoqian Li
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IEEE Potentials, 2002
After an introduction to the main principles of OFDM the author discusses the basic OFDM model, channel shortening, synchronization, and loading algorithms.
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After an introduction to the main principles of OFDM the author discusses the basic OFDM model, channel shortening, synchronization, and loading algorithms.
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A Novel TR-STBC-OFDM Scheme for MIMO-OFDM
2006 International Conference on Communications, Circuits and Systems, 2006This paper combines time-reversal space-time block coding (TR-STBC) which is for frequency-selective channel, with orthogonal frequency multiplexing (OFDM) to derive a new MIMO-OFDM system. Compared with the system which adopts STBC proposed by Alamouti, this one adopting TR-STBC exchanges the positions of OFDM modulator/demodulator and Space-time ...
Wang Zili +3 more
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2005
In this chapter we introduced the basic OFDM principle: a data stream is split into Nc parallel lower rate data streams that are modulated on separate subcarriers. Practical implementations of OFDM systems use the IDFT operation for this modulation. Although this parallellization already reduces the impact of ISI, it can be completely removed by means ...
Jean-Paul Linnartz +3 more
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In this chapter we introduced the basic OFDM principle: a data stream is split into Nc parallel lower rate data streams that are modulated on separate subcarriers. Practical implementations of OFDM systems use the IDFT operation for this modulation. Although this parallellization already reduces the impact of ISI, it can be completely removed by means ...
Jean-Paul Linnartz +3 more
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On the comparison between conventional ofdm and mse-ofdm systems
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004A new multi-symbol encapsulated orthogonal frequency division multiplexing (MSE-OFDM) system is proposed, in which one cyclic prefix (CP) is used for a frame of multiple OFDM symbols. A system level comparison between a conventional OFDM and the proposed MSE-OFDM system is presented in this study.
Yiyan Wu +2 more
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Technology Independent Security Aware OFDM (SA-OFDM)
2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2019Orthogonal frequency division multiplexing (OFDM) is currently the most prominent modulation technique, mainly due to it’s spectral efficiency. To improve the security performance of OFDM based systems, multiple security approaches are proposed in literature, including physical-layer (PHY) approaches.
Moussa Ayyash +5 more
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Comparison of Shannon Capacity between OFDM and DFT-S OFDM
Applied Mechanics and Materials, 2014DFT-S OFDM, short for DFT Spread OFDM, is employed in LTE uplink to reduce the Peak-To-Average Power Ratio (PAPR) introduced by multicarrier transmission. In this paper, we compare the maximum achievable data rate, i.e. the Shannon capacity, of DFT-S-OFDM and OFDM under Rayleigh and with clipping. Our results indicate that, in terms of Shannon Capcity,
Min Wei, Da Cheng Yang, Hong Wen Yang
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