Results 211 to 220 of about 220,563 (256)
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Applied Optics, 1971
Pulse modulation of electronic time signals is a well-proven concept, particularly in the context of data communications and computers. We suggest that pulse modulation of spatial optical signals might be another fruitful concept. The optical components and optical methods for performing the necessary operations for spatial pulse modulation are ...
A W, Lohmann, H W, Werlich
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Pulse modulation of electronic time signals is a well-proven concept, particularly in the context of data communications and computers. We suggest that pulse modulation of spatial optical signals might be another fruitful concept. The optical components and optical methods for performing the necessary operations for spatial pulse modulation are ...
A W, Lohmann, H W, Werlich
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Journal of Optical Communications and Networking, 2011
In this paper, a power and bandwidth efficient pulsed modulation technique for optical wireless (OW) communication is proposed. The scheme is called optical spatial modulation (OSM). In OSM, multiple transmit units exist where only one transmitter is active at any given time instance.
Raed Mesleh, Hany Elgala, Harald Haas
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In this paper, a power and bandwidth efficient pulsed modulation technique for optical wireless (OW) communication is proposed. The scheme is called optical spatial modulation (OSM). In OSM, multiple transmit units exist where only one transmitter is active at any given time instance.
Raed Mesleh, Hany Elgala, Harald Haas
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IEEE Transactions on Vehicular Technology, 2015
This paper proposes a new multiple-input–multiple-output (MIMO) technique called quadrature spatial modulation (QSM). QSM enhances the overall throughput of conventional SM systems by using an extra modulation spatial dimension. The current SM technique uses only the real part of the SM constellation, and the proposed method in this paper extends this ...
Raed Mesleh +2 more
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This paper proposes a new multiple-input–multiple-output (MIMO) technique called quadrature spatial modulation (QSM). QSM enhances the overall throughput of conventional SM systems by using an extra modulation spatial dimension. The current SM technique uses only the real part of the SM constellation, and the proposed method in this paper extends this ...
Raed Mesleh +2 more
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Integrated Polarization and Spatial Modulation
IEEE Transactions on Communications, 2023the so-called polarization and spatial modulation (PSM) system,
Shuaixin Yang +3 more
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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
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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
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Generalized Spatial Modulation With Multi-Index Modulation
IEEE Communications Letters, 2020In this letter, we propose a novel scheme extending index dimension with two distinct signal constellations, named as generalized spatial modulation with multi-index modulation (GSM-MIM). Through this scheme, which exploits the spatial domain and index domain, more extra information bits are transmitted by the spatial indexes as compared with the ...
Yiju Zhan, Fuchun Huang
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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
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FQAM/FPSK modulation for spatial modulation systems
2016 International Conference on Information and Communication Technology Convergence (ICTC), 2016Spatial Modulation (SM) is a recently developed transmit technique, and it has attracted wide interests for it gains higher transmit rate than single-input-single-output (SISO) system and provides simpler transceiver structure and lower power consumption compared with traditional MIMO system.
Yuan Wang +4 more
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Spatial and directional modulation with scrambling
Physical Communication, 2019Abstract In this paper, a novel spatial and directional modulation scheme with scrambling (SDM-S) is proposed toward secure wireless transmission. Compared to the conventional directional modulation scheme with cooperative receivers (DM-CR), the proposed SDM-S scheme is capable of increasing the throughput without degrading the secrecy performance ...
Qidi You, Yanping Xiao
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A differential scheme for Spatial Modulation
2013 IEEE Global Communications Conference (GLOBECOM), 2013In this paper, by considering the case of two transmit antennas, we propose a novel approach for introducing differential signaling into Spatial Modulation (SM)/Space-Shift Keying (SSK) and thus develop a differential SM/SSK (DSM/DSSK) scheme, where neither the transmitter nor the receiver has access to channel state information.
Yuyang Bian +4 more
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