Results 71 to 80 of about 24,346 (205)

Design and Optimization of Finite Alphabet Waveforms for Multiple‐Antenna Radar Covariance Matching

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This article propose a novel method for finite‐alphabet waveform generation based on constrained matrix decomposition. It also expands theoretical feasibility bounds for generating covariance matrices with binary waveforms, proves that matrices from autoregressive processes are always realizable and introduces an optimal adjustment procedure for ...
Karim Saifullin, Sajid Ahmed, Mohamed‐Slim Alouini   +2 more
wiley   +1 more source

A Novel PAPR in OTFS Systems Through ISSA-PTS and ISPR Techniques

IEEE Access
In modern communication systems, managing the Peak-to-Average Power Ratio (PAPR) remains a critical challenge, particularly in Orthogonal Time-Frequency Space (OTFS) systems.
Gerges Mansour Salama, Amira A. Mohamed, Aziza I. Hussein, M. Mourad Mabrook   +3 more
doaj   +1 more source

Analysis of Alternative Metrics for the PAPR Problem in OFDM Transmission

, 2011
The effective PAPR of the transmit signal is the standard metric to capture the effect of nonlinear distortion in OFDM transmission. A common rule of thumb is the log$(N)$ barrier where $N$ is the number of subcarriers which has been theoretically ...
Wunder, Gerhard
core   +1 more source

Joint 2‐D LFM Modulation and Mismatched Filter Design in Dual‐Function Radar‐Communication System

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This paper proposes a joint 2‐D LFM modulation and mismatched filtering design for military‐grade dual‐function radar‐communication systems. The novel scheme modulates data onto both the initial frequency and chirp rate of LFM pulses, boosting data rates whilst preserving the constant‐envelope property critical for high‐power transmission.
Kehao Wang, Zixuan Zhang, Ke Zhang, Xiaobai Li, Wei Cheng, Tony Quek   +5 more
wiley   +1 more source

Universal Filtered Multi-Carrier System Based on Selective Mapping

Xibei Gongye Daxue Xuebao, 2019
Internet of things (IoT) and machine-to-machine (M2M) communication are characterized by short periods and bursts. Traditional orthogonal frequency division multiplexing (OFDM) has not meet the demand for such traffic, while IoT and M2M communication ...

doaj   +1 more source

Application of tight-fitting half-facepiece breath-response powered air-purifying respirator for internal body cooling in occupational environment.

PLoS ONE, 2022
In dust-generating scenarios in occupational environments, it is important to take measures to prevent not only pneumoconiosis, but also heatstroke. The aim of this study was to verify whether using a tight-fitting half-facepiece breath-response powered ...
Shingo Sekoguchi, Hajime Ando, Kazunori Ikegami, Hidetaka Yoshitake, Chikage Nagano, Akira Ogami   +5 more
doaj   +1 more source

PSO Algorithm on PAPR Reduction Performance of Asymmetrically Clipped Optical‐OFDM

Applied Computational Intelligence and Soft Computing, Volume 2026, Issue 1, 2026.
This research presents a novel hybrid optimization framework combining artificial neural networks (ANN) and particle swarm optimization (PSO) to mitigate the high peak‐to‐average power ratio (PAPR) in asymmetrically clipped optical‐orthogonal frequency division multiplexing (ACO‐OFDM) systems. While conventional PTS effectively reduces PAPR, it suffers
Hermansyah Alam, Anuar Mat Safar, Norizan Mohamed Nawawi, Mohd Nordin Junita, Aymen Abdalmunam Hameed, Ridha Ejbali   +5 more
wiley   +1 more source

Application of Expurgated PPM to Indoor Visible Light Communications - Part II: Access Networks

, 2013
Providing network access for multiple users in a visible light communication (VLC) system that utilizes white light emitting diodes (LED) as sources requires new networking techniques adapted to the lighting features.
Brandt-Pearce, Maite, Noshad, Mohammad
core   +1 more source

Pilot‐Based Iterative Path Estimation and Maximum Ratio Combining (MRC)–Based Signal Detection of Orthogonal Time–Frequency Space (OTFS) Modulation for 6G in Fractional Doppler Channels

Journal of Computer Networks and Communications, Volume 2026, Issue 1, 2026.
The sixth generation (6G) wireless networks are used to provide a large coverage, and also this generation needed to support different emerging applications in harsh areas with higher user equipment mobility. For the above case, a new modulation technique called orthogonal time–frequency space (OTFS) modulation has emerged as a promising technique to ...
Ephrem Gelamite Demere, Zelalem Hailu Gebeyehu, Sohini Basu Roy   +2 more
wiley   +1 more source

Efficient Parallel PAPR Reduction Method Using Null-Constrained Peak Cancellation Signal for Massive MIMO-OFDM Systems

IEEE Open Journal of the Communications Society
In this paper, we propose new methods for reducing the peak-to-average power ratio (PAPR) for downlink massive multiple-input multiple-output (MIMO) along with orthogonal frequency division multiplexing. We develop the PAPR reduction method based on peak
Jun Saito, Takanori Hara, Kenichi Higuchi   +2 more
doaj   +1 more source