Results 281 to 290 of about 7,177,543 (330)
Some of the next articles are maybe not open access.
Spatial Modulation based Orthogonal Time Frequency Space Modulation – Multiple Access
2025 6th International Conference on Intelligent Communication Technologies and Virtual Mobile Networks (ICICV)6G communication system built with the purpose for IoT applications, Smart Vehicle, and Industrial automation. In all these fields, the number of devices engaged in communication is increasing daily to obtain more accurate information. It is required for
R. Jayashri, G. Ramkumar
semanticscholar +1 more source
Polarization-Aided Multi-User Spatial Modulation
IEEE Transactions on Vehicular TechnologyIn this paper, we propose a polarization-aided detection and decoding scheme for polar-coded multi-user spatial modulation (PA-MU-SM) systems. Exploiting the polar code structure, we treat the reception processing in MU-SM as a polar re-encoding that ...
Zhao-Peng Xie +4 more
semanticscholar +1 more source
Artificial Noise-Aided Secure Generalized Spatial Modulation for Multiuser Transmission
IEEE Communications Letters, 2020This letter focuses on the secure downlink multi-user generalized spatial modulation (MU-GSM) system based on the artificial noise (AN). Block diagonalization (BD) is firstly used to eliminate inter-user interference.
Pengli Yang, Xin Qiu, Fuqi Mu
semanticscholar +1 more source
Journal of the Optical Society of America A, 2008
The principles of amplitude and phase modulation of the spatial coherence of the optical field are discussed. They are based on the modification of the phase-space diagram of the field, provided by the marginal power spectrum, which allows synthesis of the modulating functions of the spatial coherence and the corresponding complex transmissions to be ...
Rafael, Betancur, Roman, Castañeda
openaire +2 more sources
The principles of amplitude and phase modulation of the spatial coherence of the optical field are discussed. They are based on the modification of the phase-space diagram of the field, provided by the marginal power spectrum, which allows synthesis of the modulating functions of the spatial coherence and the corresponding complex transmissions to be ...
Rafael, Betancur, Roman, Castañeda
openaire +2 more sources
Adaptive Spatial Modulation MIMO Based on Machine Learning
IEEE Journal on Selected Areas in Communications, 2019In this paper, we propose a novel framework of low-cost link adaptation for spatial modulation multiple-input multiple-output (SM-MIMO) systems-based upon the machine learning paradigm.
Ping Yang +5 more
semanticscholar +1 more source
Code-Index Modulation Aided Quadrature Spatial Modulation for High-Rate MIMO Systems
IEEE Transactions on Vehicular Technology, 2019In this correspondence paper, a novel code-index modulation (CIM) aided quadrature spatial modulation (QSM) scheme, called CIM-QSM, is proposed for highly spectrum and energy efficient multiple-input multiple-output (MIMO) systems.
Erdoğan Aydın +2 more
semanticscholar +1 more source
Applied Optics, 1974
Present situations of developments of digital spatial modulators are summarized and new models of the digital spatial modulators made of crystals of gadolinium molybdate are introduced. The first model is of a frame at a time mode. A principle of the design is based on the ferroelectric and ferroelastic properties of the crystal. The second model is of
openaire +2 more sources
Present situations of developments of digital spatial modulators are summarized and new models of the digital spatial modulators made of crystals of gadolinium molybdate are introduced. The first model is of a frame at a time mode. A principle of the design is based on the ferroelectric and ferroelastic properties of the crystal. The second model is of
openaire +2 more sources
Uplink Spatial Modulation SCMA System
IEEE Communications Letters, 2019Multiple-input multiple-output (MIMO) and sparse code multiple access (SCMA) are two effective techniques supporting high spectral efficiency and massive connectivity, respectively.
Zhi-Peng Pan +4 more
semanticscholar +1 more source
Extended quadrature spatial modulation for MIMO wireless communications
Physical Communication, 2019This paper presents an extended quadrature spatial modulation (EQSM) scheme that combines K quadrature spatial modulation (QSM) constellations to achieve a K -fold spectral efficiency (SE) enhancement.
F. R. Castillo-Soria +4 more
semanticscholar +1 more source
Spatially-Averaging Channel Estimation for Spatial Modulation
2014 IEEE 80th Vehicular Technology Conference (VTC2014-Fall), 2014Spatial modulation (SM) is a unique single-stream, multiple-input multiple-output (MIMO) transmission technique. Unlike multi-steam MIMO schemes, a single transmit antenna is activated in SM at any given time. Therefore, inter-channel interference is completely avoided.
Xiping Wu, Marco Di Renzo, Harald Haas
openaire +2 more sources