Results 81 to 90 of about 762 (245)

Low-Complexity Oversampled OTFS Receivers With Reduced Overhead

IEEE Open Journal of the Communications Society
Orthogonal Time Frequency Space (OTFS) modulation enables reliable communication in fast time-varying, frequency-selective channels. It is a delay-Doppler (DD) domain modulation that models the information symbols and the channel in the DD domain.
Narendra Deconda, Srikrishna Bhashyam, Nambi Seshadri, R. David Koilpillai   +3 more
doaj   +1 more source

Performance Analysis of OTFS Framework Over Wideband Time-Varying Channels

IEEE Open Journal of the Communications Society
Orthogonal Time Frequency Space (OTFS) modulation has garnered significant attention for its robustness in high-mobility communication scenarios. Existing research predominantly focuses on narrowband time-varying channels, where Doppler effects manifest ...
Ziqiang Gao, Xiong Deng, Xihua Zou, Wenyuan Ma, Qianli Wang, Chen Chen, Wei Pan, Lianshan Yan, Harald Haas   +8 more
doaj   +1 more source

Unlocking Catalyst Activation as a Critical Bottleneck in Cross‐Coupling Reactions: Room‐Temperature Couplings of Weak Nucleophiles Enabled by [Pd(1‐MeNAP)TFA]2 Precatalysts

Angewandte Chemie International Edition, EarlyView.
In many Pd‐catalyzed cross‐couplings, catalyst performance has been found to be limited by catalyst activation. Methylnaphthyl (MeNAP) palladium trifluoroacetate dimers are presented as easy‐to‐store and easy‐to‐handle precursors, which rapidly activate under reaction conditions, even when only weakly coordinating, non‐reducing nucleophiles are present.
Sourav Manna, Henric F. Janning, Nikolaos V. Tzouras, Jane Anto Simplica Sagayaraj, Fadil Faizal Mannighayil, Angelino Doppiu, Lukas J. Gooßen   +6 more
wiley   +1 more source

A Fixed‐Charge Interphase Synchronizes Ion Transport to Suppress Space‐Charge‐Driven Inefficiency Under Nanoliter Confinement

Angewandte Chemie International Edition, EarlyView.
Electrochemical energy storage breaks down under extreme miniaturization, where interfaces and space‐charge dominate device behavior. This work introduces a fixed‐charge selective interphase (FCSI) integrated into a twin‐tube micro‐Swiss‐roll architecture.
Yaping Yan, Jiachen Ma, Wenlan Zhang, Hongmei Tang, Yue Li, Ruhuai Mei, Yang Huang, Daniil Karnaushenko, Dmitriy D. Karnaushenko, Yumin Luo, Kai Zhang, Oliver G. Schmidt, Minshen Zhu   +12 more
wiley   +1 more source

Delay-Doppler-Domain Channel Estimation and Reduced-Complexity Detection of Faster-Than-Nyquist Signaling Aided OTFS

IEEE Open Journal of Vehicular Technology
We conceive a novel channel estimation and data detection scheme for OTFS-modulated faster-than-Nyquist (FTN) transmission over doubly selective fading channels, aiming for enhancing the spectral efficiency and Doppler resilience.
Zekun Hong, Shinya Sugiura, Chao Xu, Lajos Hanzo   +3 more
doaj   +1 more source

A hybrid detection algorithm for 5G OTFS waveform for 64 and 256 QAM with Rayleigh and Rician channels

Open Engineering
Signal detection in orthogonal time frequency space modulation is one of the critical aspects for enhancing the throughput of the beyond fifth-generation framework, especially in challenging environments characterized by high mobility and multipath ...
Kumar Arun, Alshahrani Haya Mesfer, Alotaibi Faiz, Nanthaamornphong Aziz   +3 more
doaj   +1 more source

Peak-to-Average Power Ratio Reduction of OTFS Based on Precoding DFT-Spread

IEEE Access
Orthogonal time frequency space (OTFS) modulation can effectively combat the multipath and Doppler effects in doubly-selective channels, making it suitable for high-speed mobility scenarios.
Haiqing Guan, Zongmiao He, Xinyuan Yang, Changjia Qu, Yarui Zuo   +4 more
doaj   +1 more source

Enhanced Hybrid Beamforming and Signal Detection of OTFS in Presence of Hardware Impairments

IEEE Open Journal of Vehicular Technology
Orthogonal time frequency space (OTFS) modulation is a promising approach to improve the performance of millimeter wave (mmWave) communication systems at high mobility while leveraging the wide available bandwidth.
Amit Singh, Sanjeev Sharma, Mohit Kumar Sharma, Kuntal Deka, Daniel Benevides da Costa   +4 more
doaj   +1 more source

Research status of channel estimation and signal detection techniques for orthogonal time frequency space modulation

Tongxin xuebao
Orthogonal time frequency space (OTFS) modulation is a multiplexing technique designed in the two-dimensional (2D) delay-Doppler domain suited for high Doppler fading channels. OTFS converts a doubly-selective channel into an almost non-fading channel in
WANG Yongchuan, ZHOU Ping, HUANG Ju
doaj   +2 more sources

OTFS: A Potential Waveform for Space–Air–Ground Integrated Networks in 6G and Beyond

Telecom
6G is expected to provide ubiquitous connectivity, particularly in remote and inaccessible environments, by integrating satellite and aerial networks with existing terrestrial networks, forming Space–Air–Ground Integrated Networks (SAGINs).
Obinna Okoyeigbo, Xutao Deng, Agbotiname Lucky Imoize, Olamilekan Shobayo   +3 more
doaj   +1 more source