Results 231 to 240 of about 88,236,480 (283)
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Calculation of peak-to-average power ratio in DVB-T
47th International Symposium ELMAR, 2005., 2005Extremely high peak power values are the major problem in digital terrestrial television (DVB-T). They are caused by multi-carrier modulation COFDM (Coded Orthogonal Frequency Division Multiplex). This paper contains analysis of this problem from the aspect of theoretical peak power maximum and statistical analysis of the problem where DVB-T parameters
Perčin, Domagoj +2 more
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Peak-to-average power ratio analysis of LDM signals
2015 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, 2015Layered 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.
Jon Montalban +8 more
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Peak-to-Average Power Ratio Reduction in MIMO OFDM
2007 IEEE International Conference on Communications, 2007Peak-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.
Robert F. H. Fischer, Martin Hoch
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On Peak-to-Average Power Ratio Optimization for Coded APSK
2018 15th International Symposium on Wireless Communication Systems (ISWCS), 2018The symmetric information rate is used to define the relationship between the APSK constellation parameters, the code rate, and the average and peak E b /N 0 . Minimizing the average E b /N 0 reproduces the DVB-S2 constellation parameters for 16- and 32-APSK.
Farah Arabian +4 more
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Analysis of the Peak-To-Average Power Ratio for OFDM/OQAM
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, 2006OFDM/OQAM is now a recognized alternative to conventional OFDM for the transmission of signals over multipath fading channels. Indeed with OFDM/OQAM an appropriate pulse-shaping can be introduced to fight against time and frequency dispersion. This paper focuses on a theoretical and experimental analysis of the peak-to-average power ratio (PAPR) for ...
Skrzypczack, Alexandre +2 more
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Peak-to-average power ratio in high-order OFDM
IEEE Transactions on Communications, 2001Summary: The problem of Peak-to-Average Power Ratio (PAPR) of high-order Orthogonal Frequency-Division Modulation (OFDM) is considered. Using results on level crossing of random processes, an upper bound on the probability that the PAPR of an OFDM signal will exceed a given value is derived.
Nati Dinur, Dov Wulich
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Peak to Average Power Ratio sensor for green Cognitive Radio
21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2010High Peak to Average Power Ratio (PAPR) is a critical issue in multi-standard and multi-carrier communication systems. This problem can result in large performance degradation due to the non-linearity of the High Power Amplifier (HPA) or in low power efficiency.
Palicot, Jacques +2 more
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On minimizing the peak-to-average power ratio for the sum of N sinusoids
IEEE Transactions on Communications, 1993A new derivation is presented of a previously known relationship for phasing N equal-amplitude, equally spaced (in frequency) sinusoids so that the peak-to-average power ratio of their sum is 2.6 dB. The method of derivation provides intuitive insight into why this result is possible, and shows that the 2.6 dB figure is obtained independently of N as ...
Darrell R. Gimlin, Charles R. Patisaul
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2011 XXXth URSI General Assembly and Scientific Symposium, 2011
For conventional RF power amplifier (PA), the power efficiency depends on the peak to average power ratio (PAPR) of the input signal, or more precisely on the statistical distribution of the input signal amplitude. In this paper we show that, in a similar way, the power efficiency of switching mode PA driven by ΣΔ or PWM signals depends on the ...
Baudoin, Geneviève +2 more
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For conventional RF power amplifier (PA), the power efficiency depends on the peak to average power ratio (PAPR) of the input signal, or more precisely on the statistical distribution of the input signal amplitude. In this paper we show that, in a similar way, the power efficiency of switching mode PA driven by ΣΔ or PWM signals depends on the ...
Baudoin, Geneviève +2 more
openaire +2 more sources