Results 61 to 70 of about 87,969,916 (159)
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
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
, 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 +2 more
core +3 more sources
Peak-to-average Power Ratio of Orthogonal Frequency Division Multiplexing [PDF]
, 2002 Orthogonal frequency division multiplexing (OFDM) is successfully used in many wireless digital communication systems over multipath channels. One of the principal disadvantages of OFDM is the occurrence of high peak to average power ratios (PAR). Many
Jayalath, Dhammika, Tellambura, Chintha
core
New SLM scheme to reduce the PAPR of OFDM signals using a genetic algorithm
ICT Express, 2016 Selected mapping (SLM) is a popular peak-to-average power ratio (PAPR) reduction technique suitable for use in orthogonal frequency division multiplexing (OFDM) systems as it achieves good PAPR reduction performance without signal distortion.
Insoo Sohn
doaj +1 more source
Al-Khawarizmi Engineering Journal, 2019 One of the serious problems in any wireless communication system using multi carrier modulation technique like Orthogonal Frequency Division Multiplexing (OFDM) is its Peak to Average Power Ratio (PAPR).It limits the transmission power due to the ...
Ahmed K. Hassan
doaj
Precoding in MIMO, OFDM to reduce PAPR (Peak to Average Power Ratio)
, 2012 One of the critical issues of systems utilizing Orthogonal Frequency Division Multiplexing (OFDM) is the high peak to the average power ratio of OFDM signals. We have used Precoding as a way to mitigate the PAPR problem.
Khan, Yasir Ali +2 more
core +3 more sources
A method of reducing peak-to-average power ratio (PAPR)
, 2011 A method of reducing peak-to-average power ratio (PAPR) in orthogonal frequency division multiplex (OFDM) systems is provided, wherein the method includes the steps of generating a matrix of random phase sequence based on interleaved formation, adding of
Mohd Ali, Borhanuddin +2 more
core +1 more source
Al-Khawarizmi Engineering Journal, 2008 One of the serious problems in any wireless communication system using multi carrier modulation technique like Orthogonal Frequency Division Multiplexing (OFDM) is its Peak to Average Power Ratio (PAPR).It limits the transmission power due to the ...
Ahmed K. Hassan
doaj
A mathematical PAPR estimation of OTFS network using a machine learning SVM algorithm
Results in OpticsThe article presents a Support Vector Machine (SVM) algorithm to lower the peak-to-average power ratio (PAPR) in networks that work in orthogonal time frequency space (OTFS). High PAPR makes power amplifiers less efficient and lowers signal quality. This
Arun Kumar +2 more
doaj +1 more source