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Comments on "Multitone Signals with Low Crest Factor
IEEE Transactions on Circuits and Systems, 1987A few comments are made to help clarify the subject of the above paper' and to point out some misleading statements.
Van Der Ouderaa, E. +2 more
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Crest factor reduction for dual-band systems
2013 IEEE MTT-S International Microwave Symposium Digest (MTT), 2013As wideband power amplifiers (PAs) become more power and cost efficient, supporting widely separated frequency bands with a common PA and transmit chain is becoming more practical. Dual band digital pre-distortion (DPD) techniques have been proposed as efficient alternatives to traditional wideband solutions for such applications.
Zigang Yang +3 more
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The International Journal of Developmental Biology, 1991
During neurulation, neural crest cells migrate to many regions of the body to give rise to a wide variety of cell types. Many premigratory neural crest cells are pluripotent, their potency for differentiation being gradually restricted as they migrate along definite pathways and interact with factors present in the microenvironment.
B K, Hall, S, Ekanayake
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During neurulation, neural crest cells migrate to many regions of the body to give rise to a wide variety of cell types. Many premigratory neural crest cells are pluripotent, their potency for differentiation being gradually restricted as they migrate along definite pathways and interact with factors present in the microenvironment.
B K, Hall, S, Ekanayake
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Crest Factor Reduction in Multi-carrier WCDMA Transmitters
2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, 2006This paper addresses the problem of crest factor reduction (CFR) in multi-carrier WCDMA systems. A trade-off analysis for design and optimization of the PAPR reduction algorithm within the context of the error vector magnitude (EVM) and adjacent channel leakage ratio (ACLR) quality metrics are studied.
Navid Lashkarian, Helen Tarn, Chris Dick
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Neural crest specification: tissues, signals, and transcription factors
WIREs Developmental Biology, 2011AbstractThe neural crest is a transient population of multipotent and migratory cells unique to vertebrate embryos. Initially derived from the borders of the neural plate, these cells undergo an epithelial to mesenchymal transition to leave the central nervous system, migrate extensively in the periphery, and differentiate into numerous diverse ...
Rogers, C. D. +3 more
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PAX transcription factors in neural crest development
Seminars in Cell & Developmental Biology, 2015The nine vertebrate PAX transcription factors (PAX1-PAX9) play essential roles during early development and organogenesis. Pax genes were identified in vertebrates using their homology with the Drosophila melanogaster paired gene DNA-binding domain. PAX1-9 functions are largely conserved throughout vertebrate evolution, in particular during central ...
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Palatal snoring identified by acoustic crest factor analysis
Physiological Measurement, 1999The differentiation of palatal from non-palatal snoring is very important for ENT surgeons trying to determine whether palatal surgery would be curative. At present sleep nasendoscopy is the accepted method. Palatal vibration produces marked modulation of sound loudness at low frequency (below approximately 100 Hz).
P D, Hill +3 more
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On the statistical distribution of the crest-factor of codes in OFDM transmission
Proceedings 2003 IEEE Information Theory Workshop (Cat. No.03EX674), 2003The paper presents a new approach to the calculation of the crest-factor (CF) distribution in coded OFDM systems. The approach reveals an interesting connection between the weight distribution and the CF distribution of linear, binary codes that can be exploited to give an upper bound.
Gerhard Wunder, Simon Litsyn
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OFDM signals with low crest-factor
GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record, 2002The crest-factor (CF) of a signal is the ratio of its peak magnitude to its root mean-square (RMS) magnitude. An algorithm for the generation of information carrying OFDM signals with very low CF is presented. Such signals allow for the use of OFDM modulation together with power efficient amplifiers without causing out-of-band energy due to transmitter
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On the crest factor approximation of non-contiguous OFDM signal
2015 International Symposium on Wireless Communication Systems (ISWCS), 2015Two issues - out of band emission due to nonlinear processing in power amplifier and high amplitude variation of any multicarrier signal - are mutually connected. The higher the amplitude variation, defined usually as crest factor (CF), the higher the out of band emission.
Adrian Kliks, Pawel Kryszkiewicz
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