Results 1 to 10 of about 419 (165)
Traffic and Scenario Adaptive OFDM-IM for Vehicular Networks: A Fuzzy Logic Based Optimization Approach [PDF]
SensorsOrthogonal Frequency Division Multiplexing with Index Modulation (OFDM-IM) holds significant importance in vehicle-to-everything (V2X) communications, with its main advantages being outstanding spectral efficiency and strong interference resistance ...
Xingliang Ren +3 more
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IQI Mitigation for Narrowband IoT Systems With OFDM-IM
IEEE Access, 2018 The crucial aim for 5G narrowband Internet of Things (NB-IoT) is to support massive connectivity with wide coverage area, low power consumption, low hardware complexity, and low data rate.
Armed Tusha, Seda Dogan, Huseyin Arslan
doaj +2 more sources
A Transformer-LSTM Hybrid Detector for OFDM-IM Signal Detection. [PDF]
Entropy (Basel)This paper addresses the signal detection problem in orthogonal frequency division multiplexing with index modulation (OFDM-IM) systems using deep learning (DL) techniques. In particular, a DL-based detector termed FullTrans-IM is proposed, which integrates the Transformer architecture with long short-term memory (LSTM) networks.
Wang L +9 more
europepmc +4 more sources
Low-Complexity Subcarrier-Wise Detection for MIMO-OFDM With Index Modulation
IEEE Access, 2017 Multiple-input multiple-output orthogonal frequency division multiplexing with index modulation (MIMO-OFDM-IM) is a relatively new multicarrier transmission technique for the MIMO systems to achieve both energy and spectral efficiency.
Zeng Hu +5 more
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Inter‐numerology interference in OFDM‐IM systems [PDF]
IET Communications, 2021 Abstract In 5G and beyond communication systems, distinct numerologies can coexist to serve diverse requirements for users and applications. However, the inter‐numerology interference (INI) is a main challenge that significantly impacts the system performance.
Seda Dogan Tusha +5 more
openaire +6 more sources
IEEE Wireless Communications Letters, 2018 Orthogonal frequency division multiplexing (OFDM) with index modulation (IM) is a multicarrier transmission technique for frequency-selective fading channels. Although it is energy and spectral efficient, its performance may not be satisfactory as some active subcarriers can be suppressed by fading. In this letter, we consider trellis coded modulation (
Jinho Choi 0001, Youngwook Ko
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Precoding for Spread OFDM IM [PDF]
2018 IEEE 87th Vehicular Technology Conference (VTC Spring), 2018 Orthogonal frequency division multiplexing index modulation (OFDM-IM) has been emerging as a promising solution to increase the reliability at low complexity. However, the transmit diversity of the OFDM-IM schemes has been limited to two, due to unbalanced transmit diversity between index bits and complex data bits.
Thien Van Luong +2 more
openaire +3 more sources
IEEE Access, 2022 In this paper, it is proposed to enhance coherent optical orthogonal frequency-division multiplexing (OFDM) system by using index modulation in terms of bit error rate (BER) and spectral efficiency for different levels of the fiber nonlinearity.
Ahmet Guner
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Index Modulation OFDM Systems with Direct Pattern of Subcarrier Activation
NTU Journal of Engineering and Technology, 2023 OFDM-IM is a spatial modulation technique applied to OFDM's block subcarriers, resulting in a modified version of OFDM. Compared to traditional OFDM, OFDM-IM boasts several benefits, such as enhanced bit-error rate (BER) performance and power efficiency.
Zainab Mohammed Abdulkareem +1 more
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Orthogonal Subblock Division Multiple Access for OFDM-IM-Based Multi-User VLC Systems
Photonics, 2022 In this paper, we propose and experimentally demonstrate an orthogonal subblock division multiple access (OSDMA) scheme for orthogonal frequency division multiplexing with index modulation (OFDM-IM)-based multi-user visible light communication (MU-VLC ...
Yungui Nie +5 more
doaj +1 more source