Results 211 to 220 of about 4,021,406 (264)

Performance Enhancement of OAM With OFDM-IM for FSO Communications Using LLR Detection

IEEE transactions on broadcasting
Orbital angular momentum (OAM) communication has emerged as a promising technology for significantly enhancing data transmission efficiency and overall system performance in free-space optical (FSO) communication systems.
Aye Yadanar Win, Merhawit Berhane Teklu, Y. Chung   +2 more
semanticscholar   +1 more source

Rotated 8QAM probabilistic shaping scheme based on DM-OFDM-IM over an underwater magnetic induction communication system.

Optics Express
This paper introduces a rotated 8QAM probabilistic shaping (PS) scheme based on dual-mode orthogonal frequency-division multiplexing with index modulation (DM-OFDM-IM) over an underwater magnetic induction (MI) communication system.
jiyuann wang, Jianxin Ren, Bo Liu, Y. Mao, Xiumin Song, Shuaidong Chen, Xue Tang, Lilong Zhao, Rahat Ullah   +8 more
semanticscholar   +1 more source

Modified TRFI Channel Estimation Scheme in OFDM-IM for 802.11p

2023 IEEE 23rd International Conference on Communication Technology (ICCT), 2023
IEEE 802.11p is developed to support cooperative intelligent transport systems. In such systems, channel estimation is a challenging problem due to the channel's double dispersive nature.
Si-Yu Zhang, Qing-Shang Dong, Hui Zheng, Yue-Xia Zhang 0001, Behnam Shahrrava   +4 more
openaire   +2 more sources

Noncoherent OFDM-IM and Its Performance Analysis

IEEE Transactions on Wireless Communications, 2018
In conventional orthogonal frequency division multiplexing (OFDM) with index modulation (OFDM-IM), the active subcarriers can convey information bits by modulated symbols as well as their indices. To detect modulated symbols, coherent detection is usually considered, which requires the channel state information (CSI) estimation for all subcarriers at a
openaire   +1 more source

A Spectral and Energy Efficient Noise Variance and SNR Estimator for DMH OFDM-IM Systems

IEEE Canadian Journal of Electrical and Computer Engineering
The classical orthogonal frequency division multiplexing (OFDM) systems gained significant new dimensions with the introduction of index modulation (IM) schemes.
Bandi Narasimha Rao, A. Sundru
semanticscholar   +1 more source

Reconfigurable Intelligent Surface-Assisted OFDM-IM for Beyond 5G Mobile Networks: ML and LLR Detector Designs

2023 IEEE International Conference on Contemporary Computing and Communications (InC4), 2023
The several countries of the world is intensified their investigative on the fifth generation and beyond (5GB) communications in order to reach the new requirements for new wireless applications.
Busra Ceniklioglu, I. Develi, A. E. Canbilen   +2 more
semanticscholar   +1 more source

Golden Angle Modulation Aided Differential OFDM-IM for LEO Satellite Communications

IEEE Communications Letters
In this letter, a golden angle modulation (GAM) aided differential orthogonal frequency division multiplexing with index modulation (DOFDM-IM-GAM) system for low-earth orbit (LEO) satellite communications is proposed, which amalgamates the concept of ...
Xiaodan Zhai, Lixia Xiao, Tingyu Ding, Jiaxi Zhou, Pei Xiao, Tao Jiang   +5 more
semanticscholar   +1 more source

Time-Modulated OFDM-IM Directional Modulation Antenna Array Transmitters

2023 Cross Strait Radio Science and Wireless Technology Conference (CSRSWTC), 2023
Orthogonal frequency-division multiplexing (OFDM) directional modulation (DM) has been well studied in securing multicarrier signals in physical-layer wireless communications. However, it suffers from the high peak-to-power ratio (PAPR) issue.
Yuxin Lei, Gaojian Huang, Shan Ouyang, Shuanggen Jin, Xingwang Li, Hui Guo   +5 more
semanticscholar   +1 more source

Two-Stage Dilated Convolutional Neural Network-Based Detector for OFDM-IM

IEEE Transactions on Green Communications and Networking
As a key emerging green communication technology, signal detection based on deep learning can improve communication performance for orthogonal frequency division multiplexing with index modulation (OFDM-IM). However, it may lead to an increase in the bit
Ruiyan Du, Huifang Wang, Shiyi Wang, Baozhu Shi, Zhuoyao Duan, Fulai Liu   +5 more
semanticscholar   +1 more source

Low-Complexity PAPR Reduction of OFDM-IM Signals via ADMM Approaches

IEEE Communications Letters
As a new multicarrier modulation technology, orthogonal frequency division multiplexing index modulation has more advantages than OFDM. Specifically, OFDM-IM demonstrates improved bit error rate (BER) performance at low to medium data rates and enhanced ...
Jiabo Hu, Yajun Wang, Zhuxian Lian, Yinjie Su, Zhibin Xie   +4 more
semanticscholar   +1 more source