Results 221 to 230 of about 4,021,406 (264)

Noncoherent Detection for Improving the Spectral Efficiency of OFDM-IM Systems

Wireless Personal Communications, 2020
Today, Orthogonal Frequency Division Multiplexing (OFDM) is the most preferred and commonly used scheme for all communication systems. A new multicarrier technique called OFDM with Index Modulation (OFDM-IM) has been developed recently where the indices of the active subcarriers are used to transmit information in addition to the constellation symbols.
R. Shantha Selvakumari, J. Jasline Tracia   +1 more
openaire   +1 more source

Deep learning‐based channel estimation for OFDM‐IM systems over Rayleigh fading channels

International Journal of Communication Systems
Deep learning (DL)‐based channel estimation for orthogonal frequency division multiplexing with index modulation (OFDM‐IM) under Rayleigh fading channel conditions is presented in this paper.
Omer Adiguzel, I. Develi
semanticscholar   +1 more source

IM-NOMA: A Hybrid OFDM-IM and OFDM Systems for Enhancing Achievable Rate and SNR with QPSK

International Conference on Electrical Engineering and Information Communication Technology
This paper presents a hybrid Orthogonal frequency-division multiplexing (OFDM) and index modulated OFDM (OFDM-IM) technology superimposed using non-orthogonal multiple access (NOMA) method. NOMA is via superposition over resources investigated to enhance
P. Lavanya, G. Siva, Sankar Varma
semanticscholar   +1 more source

Error analysis of OFDM‐IM systems for beyond 5G: The effect of IQI at transceiver

International Journal of Communication Systems
It is well known that hardware impairments (HWIs) can worthy reduce the wireless system performance at high carrier frequencies by showing random effects.
Busra Ceniklioglu, I. Develi, A. E. Canbilen   +2 more
semanticscholar   +1 more source

On the Mutual Information and Huffman Coding for OFDM-IM

2018 2nd IEEE Advanced Information Management,Communicates,Electronic and Automation Control Conference (IMCEC), 2018
A101 an improved multicarrier transmission technique of orthogonal frequency division multiplexing (OFDM), OFDM with index modulation (OFDM-IM) has attracted great attention for its flexible design of the transmission frame and better bit error rate (BER) performance compared with that of classical OFDM.
Zeng Hu, Jing Liu, Fangjiong Chen
openaire   +1 more source

On the Optimal Tone Spacing for Interference Mitigation in OFDM-IM Systems

IEEE Communications Letters, 2017
Orthogonal frequency division multiplexing with index modulation (OFDM-IM) has been recently proposed as an efficient technique to improve the error performance and enhance the spectral efficiency achieved by the classical OFDM. In this letter, we minimize the presence of intercarrier and intersymbol interference, experienced by OFDM-IM systems under ...
Georgia D. Ntouni, Vasileios M. Kapinas, George K. Karagiannidis   +2 more
openaire   +1 more source

Compressed Sensing Optimized OFDM-IM Lidar-Communication Integrated System

2024 IEEE 12th International Conference on Information, Communication and Networks (ICICN)
To address the problem of low transmission rate of information embedded in radar waveforms, an integrated orthogonal frequency division multiplexing-index modulation (OFDM-IM) lidar-communication system is proposed.
Lingyun Zhang, Minghua Cao, Xingyu Zhang, Yuan Huang, Xinhui Shi, Yue Zhang   +5 more
semanticscholar   +1 more source

The Impact of Transceiver IQI on RIS-Assisted OFDM-IM over η-μ Fading Channels

2024 IEEE International Conference on Communication, Networks and Satellite (COMNETSAT)
Wireless transceivers are subject to hardware impairments (HWI) that cause significant performance losses in practice. In-phase (I) and quadrature-phase (Q) imbalance, or IQI, is a source of frequency interference that also impairs the linearity of ...
Busra Karahan, I. Develi
semanticscholar   +1 more source

Error Probability Analysis of OFDM-IM With Carrier Frequency Offset

IEEE Communications Letters, 2016
OFDM-IM, which uses the indices of active subcarriers to carry additional information bits, is a novel multi-carrier transmission technique. In this letter, by exploiting the special design of OFDM-IM, we propose an analytical approach to evaluate the error probability of OFDM-IM subject to carrier frequency offset (CFO) in fading channels, where the ...
Qianli Ma, Ping Yang 0005, Yue Xiao 0001, Huirong Bai, Shaoqian Li   +4 more
openaire   +1 more source

Ofdm-Im Performance Analysis in Presence of Doppler Frequency Shift

2024 6th International Communication Engineering and Cloud Computing Conference (CECCC)
This paper investigates the performance degradation of the OFDM-IM system caused by transceiver movement, which leads to Inter-Carrier Interference (ICI) due to the Doppler frequency shift.
Houssein Boud, Raveendra K. Rao
semanticscholar   +1 more source