Results 241 to 250 of about 1,161,775 (285)

DMT signals with low peak-to-average power ratio

Proceedings IEEE International Symposium on Computers and Communications (Cat. No.PR00250), 2003
This contribution proposes a new family of methods to reduce the peak-to-average power ratio (PAR) in discrete multi-tone (DMT) and orthogonal frequency division multiplexing (OFDM) systems. This method avoids the use of extra inverse fast Fourier transformations (IFFT) as were used in some previously published techniques, but instead is based on ...
Zekri, Mohamed, Boets, Patrick, Van Biesen, Leo   +2 more
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On minimum peak-to-average power ratio spectral factorization

2011 8th International Workshop on Multi-Carrier Systems & Solutions, 2011
The design of a filter with a given autocorrelation function — or in other words, the factorization of an autocorrelation sequence — is a standard task in digital communications. This paper demonstrates that different spectral factors have a different impact on finite-support random sequences in terms of peak-to-average power ratio.
Thomas Magesacher, John M. Cioffi
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Peak to average power ratio reduction of OFDM system

International Conference on Information Communication and Embedded Systems (ICICES2014), 2014
Orthogonal frequency division multiplexing (OFDM) is a modulation technique that is suitable for high data rate communication. But the main drawback of OFDM is its high peak to average power ratio (PAPR), which can lead to nonlinear distortions in the power amplifiers at the transmitter side.
T. Gayathri, K. Bavithra
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Statistical Peak to Average Power Ratio Bound

International Journal on Communications Antenna and Propagation (IRECAP), 2015
Central limit theorem, modern extreme value theory and the theory that the discrete orthogonal frequency division multiplexing signals converge weakly to a Gaussian random process are generally employed to derive the best approximation of peak-to-average power ratio distributions of discrete-time and continuous-time signals. In this paper, we arrive at
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Peak-to-Average Power Ratio in WFMT Systems

2006 International Conference on Wireless Communications, Networking and Mobile Computing, 2006
This paper discuses the peak to average power ratio (PAR) for the signal of a novel wavelet based filtered multi-tone (WFMT) modulation. The wavelet based filtered multi-tone (WFMT) modulation was developed as an alternative line code for xDSL system and represents future extension of OFDM/DMT technologies.
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Peak-to-average power ratio analysis of LDM signals

2015 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, 2015
Layered Division Multiplexing (LDM) is as a new technical solution for multiplexing different services over the same RF channel. it has already been accepted as a baseline technology for the new generation ATSC 3.0 digital terrestrial television (DTT) standard.
J. Montalban, J. Barrueco, I. Angulo, L. Zhang, Y. Wu, W. Li, H-M. Kim, S-I. Park, J-Y. Lee   +8 more
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Band-shaped analog peak-to-average power ratio reduction

2015 IEEE Radio and Wireless Symposium (RWS), 2015
This paper demonstrates a band-shaped all-analog peak-to-average power ratio (PAR) reduction. It uses fast and accurate analog components modeled after circuits implemented in IBM 5PAe 0.35-µm SiGe BiCMOS process. The architecture is designed to precisely clip the RF signal at a certain level, but also employs a clipping function shaping technique to ...
Mikyung Cho, J. Stevenson Kenney
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Assessing peak-to-average power ratios for communications applications

IEEE MILCOM 2004. Military Communications Conference, 2004., 2005
High peak-to-average ratio (PAR) is a significant drawback for orthogonal frequency division multiplexing (OFDM). Accordingly, many authors have proposed different PAR reduction methods that rely on different trade-offs. It is important to quantify the effectiveness of an individual PAR reduction method.
R.J. Baxley, G.T. Zhou
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Peak-to-Average Power Ratio Reduction in MIMO OFDM

2007 IEEE International Conference on Communications, 2007
Peak-to-average power ratio (PAR) reduction in OFDM using antenna arrays (MIMO OFDM) is considered. In particular, generalizations of selected mapping (SLM) recently proposed in literature, are studied, and a new version, we call it directed SLM (dSLM), is introduced.
R. F. H. Fischer, M. Hoch
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Peak to average power ratio in WLAN-OFDM system

4th National Conference of Telecommunication Technology, 2003. NCTT 2003 Proceedings., 2003
Orthogonal frequency division multiplexing (OFDM) is one of the multicarrier modulation techniques that can reduce the ISI and delay spread of signal. This technique also allows subchannel to overlap. The orthogonality of the subchannels reduce the bandwidth (BW) and increase the spectral efficiency of system.
N. Ngajikin, N. Fisal, S.K. Yusof
openaire   +1 more source