Results 21 to 30 of about 2,477 (201)
A Simple Nonlinear Companding Transfrom for Nonlinear Compensation of Direct-Detection Optical OFDM Systems [PDF]
International Journal of Electronics and Telecommunications, 2020 In direct-detection OFDM systems, the nonlinear effects caused by optical modulation and fiber transmission can degrade the system performance severely.
Trang T. Ngo, Nhan D. Nguyen
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Two novel nonlinear companding schemes with iterative receiver to reduce PAPR in multi-carrier modulation systems [PDF]
, 2006 Companding transform is an efficient and simple method to reduce the Peak-to-Average Power Ratio (PAPR) for Multi-Carrier Modulation (MCM) systems.
Guo, P, Jiang, T, Qu, D, Song, Y, Yao, W
core +1 more source
1 V CMOS subthreshold log domain PDM [PDF]
, 2003 A new CMOS circuit strategy for very low-voltage Pulse-Duration Modulators (PDM) is proposed. Optimization of voltage supply scaling below the sum of threshold voltages is based on Instantaneous Log Companding processing through the MOSFET operating in ...
Huertas Díaz, José Luis +1 more
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A Hybrid Approach to Reduce the PAPR of OFDM Signals Using Clipping and Companding
IEEE Access, 2020 Orthogonal frequency division multiplexing (OFDM) is an important technology that has been widely used in broadband wireless communications. However OFDM has some drawbacks, one of which is the high peak-to-average power ratio (PAPR) problem.
Bo Tang, Kaiyu Qin, Haibo Mei
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Low complexity hybrid SLM for PAPR mitigation for ACO OFDM
ICT Express, 2022 The high peak to average power ratio (PAPR) is the main challenge facing asymmetrically clipped optical (ACO) orthogonal frequency division multiplexing (OFDM).
Roland Niwareeba +2 more
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Distributed Functional Scalar Quantization Simplified [PDF]
, 2012 Distributed functional scalar quantization (DFSQ) theory provides optimality conditions and predicts performance of data acquisition systems in which a computation on acquired data is desired.
Goyal, Vivek K +2 more
core +3 more sources
Journal of Cachexia, Sarcopenia and Muscle, Volume 11, Issue 5, Page 1291-1305, October 2020., 2020 Background Impaired muscle regeneration and increased muscle fibrosis are observed in aged muscle accompanied by progressive loss of muscle mass (sarcopenia). However, the underlying mechanism is still unclear. Methods The differentiated expressed genes in young and aged muscles after acute injury by cardiotoxin were identified by RNA‐sequence analysis.
Congcong Zhang +7 more
wiley +1 more source
Electronically Tunable Current-Mode Third-Order Square-Root-Domain Filter Design [PDF]
, 2018 In this study, electronically-tunable, current-mode, square-root-domain, third-order low-pass filter is proposed. The study is carried out with three circuit designs. First circuit is third-order low-pass Butterworth filter, second circuit is third-order
Adalar, F.Z. +2 more
core +1 more source
Advances in Electrical and Computer Engineering, 2010 In this article DPCM (Differential Pulse Code Modulation) speech coding scheme with a simple switched first order predictor is presented. Adaptation of the quantizer to the signal variance is performed for each particular frame. Each frame is classified
VELIMIROVIC, L. +3 more
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Root-Based Nonlinear Companding Technique for Reducing PAPR of Precoded OFDM Signals
IEEE Access, 2018 Orthogonal frequency division multiplexing (OFDM) signals are characteristically independent and identically distributed Gaussian random variables that follow Rayleigh distribution. The signals also exhibit high peak-to-average power ratio (PAPR) problem
Kelvin Anoh +3 more
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