Results 41 to 50 of about 122,418 (183)

Mutual Information Analysis for Generalized Spatial Modulation Systems With Multilevel Coding

open access: yesIEEE Open Journal of the Communications Society, 2022
Generalized Spatial Modulation (GSM) enables a trade-off between very high spectral efficiencies and low hardware costs for massive MIMO systems. This is achieved by transmitting information via the selection of active antennas from a set of available ...
Volker Kuhn   +2 more
doaj   +1 more source

Submillimeter Polarimetry with PolKa, a reflection-type modulator for the APEX telescope [PDF]

open access: yes, 2014
Imaging polarimetry is an important tool for the study of cosmic magnetic fields. In our Galaxy, polarization levels of a few up to $\sim$10\% are measured in the submillimeter dust emission from molecular clouds and in the synchrotron emission from ...
Güsten, Rolf   +8 more
core   +2 more sources

Downlink Precoding for Massive MIMO Systems Exploiting Virtual Channel Model Sparsity

open access: yes, 2017
In this paper, the problem of designing a forward link linear precoder for Massive Multiple-Input Multiple-Output (MIMO) systems in conjunction with Quadrature Amplitude Modulation (QAM) is addressed.
Ayanoglu, Ender, Ketseoglou, Thomas
core   +1 more source

Generalized Polarization–Spatial Modulation With Multimode Transmission [PDF]

open access: yesIEEE Internet of Things Journal
Polarization-spatial modulation (PSM) has been recently proposed to improve the system performance and energy efficiency of the conventional polarization modulation (PM) by activating only a single dual-polarized (DP) antenna for signal transmission.
Jun Li   +6 more
openaire   +1 more source

Generalized Spatial Modulation in Highly Correlated Channels [PDF]

open access: yes2019 IEEE 30th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC Workshops), 2019
Generalized spatial modulation (GSM) is a promising technique that can highly increase the spectral efficiency for ultra-high data rate systems. However, its performance degrades in highly correlated channels such as those in the millimeter wave (mmWave) and sub-Terahertz (sub-THz) bands.
Saad, Majed   +5 more
openaire   +2 more sources

Generalized Approximate Message Passing Detector for GSM-OTFS Systems

open access: yesIEEE Access, 2022
Orthogonal Time Frequency Space (OTFS) as a two-dimensional modulation scheme designed in the delay-Doppler domain, is realized by inverse symplectic finite Fourier transform (ISFFT) and symplectic finite Fourier transform (SFFT), for combating the high ...
Tiebin Wang   +5 more
doaj   +1 more source

On the Performance of MIMO FSO Communications over Double Generalized Gamma Fading Channels

open access: yes, 2015
A major performance degrading factor in free space optical communication (FSO) systems is atmospheric turbulence. Spatial diversity techniques provide a promising approach to mitigate turbulence-induced fading.
Aminikashani, Mohmmadreza   +2 more
core   +1 more source

Multidimensional Index Modulation in Wireless Communications

open access: yes, 2017
In index modulation schemes, information bits are conveyed through indexing of transmission entities such as antennas, subcarriers, times slots, precoders, subarrays, and radio frequency (RF) mirrors.
Bhat, Sandeep   +3 more
core   +1 more source

Generalized Spatial Modulation Algorithm with Illumination Constraint in Visible Light Communication [PDF]

open access: yesJisuanji gongcheng, 2019
The illumination in Visible Light Communication(VLC) needs to consider optical power conversion and illumination uniformity.Based on the spatial domain and amplitude of multi-antenna Pulse Amplitude Modulation(PAM)signal,a generalized spatial modulation ...
WU Yingjie,XU Hongbo,KANG Rui
doaj   +1 more source

Optimized Distributed Generalized Reed-Solomon Coding with Space-Time Block Coded Spatial Modulation

open access: yesSensors, 2022
We present a well-known generalized Reed–Solomon (GRS) code incorporated with space-time block coded spatial modulation (STBC-SM) for wireless networks, which is capable of enjoying coded cooperation between the source and the relay.
Chunli Zhao   +4 more
doaj   +1 more source

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