Results 61 to 70 of about 241 (175)

Companding with junction f.e.t.

Electronics Letters, 1970
As companding elements, field-effect transistors have advantages over p–n diodes; they have suitably shaped i/v characteristics which are controllable by gate bias. Tests show that a departure from linearity of compressor and expander in cascade can be corrected to have an error of less than 1%.
J.E. Flood, F. Morris
openaire   +1 more source

Companding in signal processing

Electronics Letters, 1990
The use of companding in signal processing is considered. The applications discussed include noise reduction as well as increasing selectivity in single sinusoid detection.
Y.P. Tsividis, V. Gopinathan, L. TóTh
openaire   +1 more source

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

The Research on Improved Companding Transformation for Reducing PAPR in Underwater Acoustic OFDM Communication System

Discrete Dynamics in Nature and Society, 2016
To solve the problem of the high peak-to-average power ratio (PAPR) in Orthogonal Frequency Division Multiplexing (OFDM) for the underwater acoustic communication system, the paper offers a method of reducing PAPR which combines the amplitude limiting ...
Jinqiu Wu, Gang Qiao, Xiaofei Qi
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  

A Joint Statistical Moment-Based Blind Channel Estimation and Modified TL-RCT Companding Approach for DCO-OFDM in VLC-Driven IoT Applications

IEEE Open Journal of Vehicular Technology
Visible light communication (VLC) has emerged as a promising technology for high speed, energy efficient data transmission in Internet of Things (IoT) applications.
Vijaya Durga Chintala, Rani Deepika Balavendran Joseph, Subba Rao Suddapalli, Vinay K Tiwari   +3 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

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

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