Results 81 to 90 of about 2,477 (201)

FEC-Assisted PAPR Reduction in OFDM System—Performance Analysis

IEEE Access
As 6G standardization continues, Orthogonal Frequency Division Multiplexing (OFDM) continues to be the preferred waveform due to its spectral efficiency and robustness against multipath fading.
K. M. Kaushal Karthik, K. Phani Samhitha, S. R. Swateekha, C. Hemanth, R. G. Sangeetha   +4 more
doaj   +1 more source

Joint PAPR Reduction Technology Enabled by Neural Network-based Coding and Companding

Guangtongxin yanjiu, 2023
Multi-carrier modulation technology is an advanced modulation method commonly used in broadband communication systems. However, multi-carrier signals will produce a very large Peak to Average Power Ratio (PAPR) in the time domain, which will lead to non ...
Nie Jun-yuan, Zhang Da-wei, Zhang Jing
doaj  

Transmit power imbalance reduction method and nonlinear companding transform for beamforming OFDM systems

ICT Express, 2019
Due to large peak-to-average power ratio (PAPR) at the time domain OFDM signal, various peak signal reduction methods for OFDM systems have been proposed.
Satoshi Taroda, Ken Tezuka, Shoichi Higuchi, Chang-Jun Ahn, Kazuki Maruta   +4 more
doaj   +1 more source

Dynamic thresholding logarithmic companding for PAPR reduction in MIMO-OFDM systems for 5G wireless communication

Measurement: Sensors
In order to advance 5G wireless communication technology, this paper presents a novel method for lowering the Peak-to-Average Power Ratio (PAPR) in Multiple-Input Multiple-Output Orthogonal Frequency-Division Multiplexing (MIMO-OFDM) systems.
D. Ramadevi, P. Trinatha Rao
doaj   +1 more source

Multilevel Delta Modulation with Switched First-Order Prediction for Wideband Speech Coding

Elektronika ir Elektrotechnika, 2018
In this paper a delta modulation speech coding scheme based on the ITU-T G.711 standard and the switched first-order predictor is presented. The forward adaptive scheme is used, where the adaptation to the signal variance is performed on frame-by-frame ...
Zoran Peric, Bojan Denic, Vladimir Despotovic   +2 more
doaj   +1 more source

Log-Polar Quantizer with the Embedded G.711 Codec [PDF]

, 2010
In this paper a new two-dimensional vector quantizer for memoryless Gaussian source, realized in polar coordinates, is proposed. The G.711 codec is embedded in our vector quantizer, and therefore our vector quantizer is compatible with the G.711 codec ...
Dincic, M. R., Peric, Z. H.
core   +1 more source

PAPR REDUCTION IN ACO-OFDM FOR VISIBLE LIGHT COMMUNICATION SYSTEM [PDF]

Journal of Engineering Science and Technology, 2018
Visible Light Communication (VLC) is gaining popularity in optical wireless. In conventional OFDM, bi-polar signals having both positive and negative values are considered.
MOHIT SRIVASTAVA, MANOJ KUMAR SHUKLA, NEELAM SRIVASTAVA, ASHOK KUMAR SHANKHWAR   +3 more
doaj  

ADAPTIVE COMPRESSING OF THE HIGH DYNAMIC RANGE OF DIGITAL RADAR SATELLITE IMAGES

Informatika, 2018
Transformation of a digital radar image with a wide dynamic range of luminance values (up to 216 tones) for visualization on a standard monitor is considered. The monitor has 28 gray value range or any of three basic colors in the RGB system.
V. V. Starovoitov
doaj  

Constrained RS coding for Low Peak to Average Power Ratio in FBMC - OQAM Systems [PDF]

Journal of Electrical and Electronics Engineering, 2019
Multi-carrier modulation techniques have now become a standard in many communication protocols. Filter bank based multi-carrier (FBMC) generation techniques have been discussed in the literature as a means for overcoming the shortcomings of IFFT/FFT ...
Job CHUNKATH, V.S. SHEEBA, Nisha VARGHESE   +2 more
doaj  

PAPR reduction using SLM-PTS-CT hybrid PAPR method for optical NOMA waveform. [PDF]

Heliyon, 2023
Kumar A, Rajagopal K, Alruwais N, Alshahrani HM, Mahgoub H, Othman KM.   +5 more
europepmc   +1 more source