Results 61 to 70 of about 3,698 (177)

Two-stage collaborative information interaction reliability improvement for the distribution grid

Frontiers in Energy Research
The impulse noise generated by a large volume of power electronics devices imposes a hazardous impact on information interaction reliability in low-voltage distribution grids.
Zhan Shi
doaj   +1 more source

Increasing the power efficiency of an IEEE802.11a power amplifier

, 2005
OFDM modulation is extensively used in many applications. However, it also exhibits high peak-to-average power ratios (PAPR) requiring the associated transmit amplifier to have a very large linear region.
Chen, K, Morris, KA, Beach, MA
core  

Peak-to-average power ratio reduction of FDRM

, 2006
Frequency Domain Reciprocal Modulation (FDRM), originally developed by T. D. Williams [1, 2], is an enhanced method of modulation to complement Orthogonal Frequency Division Multiplexing (OFDM) techniques.
McMeekin, Scott, Pingyu, Lin, Stewart, Brian G.   +2 more
core   +1 more source

On the links between Peak to Average Power Ratio for conventional RF Power Amplifier and Peak to Average Duration Ratio for Switching mode Power Amplifiers

, 2011
International audienceFor 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
Diet, Antoine, Baudoin, Geneviève, Villegas, Martine   +2 more
core   +1 more source

A differential recursive scheme for suppression of Peak to average power ratio for OFDM

, 2006
A differential recursive scheme for suppression of Peak to average power ratio (PAPR) for Orthogonal frequency division multiplexing (OFDM) signal is proposed in this thesis.
Liu Y, Liu, Y, Chinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China., Shi Y   +2 more
core  

Analisis reduksi Peak To Average Power Ratio (PAPR) pada Orthogonal Frequency Division Multiplexing (OFDM) [PDF]

, 2017
Pesatnya perkembangan teknologi komunikasi saat ini merupakan suatu tanggapan dari kebutuhan manusia akan teknologi komunikasi yang handal dalam mengirimkan data dengan kecepatan tinggi dan efisien.
Rosalina, (NIM. 1021311045)
core  

Discrete Hartley matrix transform precoding-based OFDM system to reduce the high PAPR

ICT Express, 2019
The high peak-to-average power ratio (PAPR) is one of the major drawbacks of the orthogonal frequency division multiplexing (OFDM) systems that make non-linear distortion in practical implementation of high power amplifier (HPA).
Abbas Ali Sharifi
doaj   +1 more source

Peak to average power ratio reduction in NC–OFDM systems [PDF]

, 2015
Non contiguous orthogonal frequency division multiplexing (NC-OFDM) is an efficient and adaptable multicarrier modulation scheme to be used in cognitive radio communications.
Tabassum, Saadia, Hussain, Sajjad, Ghafoor, Abdul   +2 more
core   +1 more source

Characterization of Nonlinearities in a Class-J Power Amplifier

Telfor Journal, 2018
We characterize the nonlinearities of our previously designed 10 W class-J power amplifier with a carrier at 1.5 GHz. We employ numerical simulations and real time adjacent channel power ratio (ACPR) measurements on the fabricated prototype.
B. Bukvić, M. M. Ilić
doaj   +1 more source

Fast peak-power reduction for MIMO-OFDM systems with diversity

, 2009
A robust peak-power reduction technique called active constellation extension (ACE) reduces the peak-to-average power ratio (PAPR) of single-input single-output (SISO) orthogonal frequency-division modulated (OFDM) signals by extending the outer ...
Tsiligkaridis, Theodoros
core