Results 81 to 90 of about 26,068 (175)

Single-RF spatial modulation requires single-carrier transmission: frequency-domain turbo equalization for dispersive channels

, 2015
In this paper, we propose a broadband single-carrier (SC) spatial-modulation (SM) based multiple-input multipleoutput (MIMO) architecture relying on a soft-decision (SoD) frequency-domain equalization (FDE) receiver.
Hanzo, Lajos, Sugiura, Shinya
core   +1 more source

Low‐complexity de‐mapping algorithms for 64‐APSK signals

ETRI Journal, 2019
Due to its high spectrum efficiency, 64‐amplitude phase‐shift keying (64‐APSK) is one of the primary technologies used in deep space communications and digital video broadcasting through satellite‐second generation.
Junwei Bao, Dazhuan Xu, Xiaofei Zhang, Hao Luo   +3 more
doaj   +1 more source

Reduced-Complexity Noncoherently Detected Differential Space-Time Shift Keying

Motivated by the recent development of Spatial Modulation (SM) and Differential Space-Time Shift Keying (DSTSK), we propose a reduced-complexity Conventional Differential Detector (CDD) as well as its reduced-complexity Multiple-Symbol Differential ...
Hanzo, Lajos, Ng, Soon, Sugiura, Shinya, Xu, Chao   +3 more
core  

Structured Optical Receivers for Efficient Deep-Space Communication

, 2017
We discuss conceptual designs for structured optical receivers that can alleviate the requirement for high peak-to-average power ratio in photon-starved optical communication.
Banaszek, Konrad, Jachura, Michał
core   +1 more source

Power Domain Hybrid Modulation-Based Coherent Optical Transmission with Successive Interference Cancelation

Photonics
The 6G era necessitates advanced multiplexing techniques that fully utilize various physical dimensions, including time, frequency, polarization, and space to enhance the achievable bitrate per wavelength and satisfy growing demands for capacity and ...
Xiaoling Zhang, Yong Geng
doaj   +1 more source

Design and Performance Analysis of an Index Time Frequency Modulation Scheme for Optical Communications

, 2019
In this article, we propose an index modulation system suitable for optical communications, based on jointly driving the time and frequency of the signal: an index-time frequency hopping (I-TFH) system.
Escribano, Francisco J., Evangelista, Joao V. C., Kaddoum, Georges, Wagemakers, Alexandre   +3 more
core   +1 more source

Differential Space-Time Coding Scheme Using Star Quadrature Amplitude Modulation Method

EURASIP Journal on Advances in Signal Processing, 2006
Differential space-time coding (DSTC) has received much interest as it obviates the requirement of the channel state information at the receiver while maintaining the desired properties of space-time coding techniques. In this paper, by introducing star
Bi Guangguo, Yu Xiangbin, Xu DaZhuan
doaj   +1 more source

You\u27re Gonna Be Ok: A System to Control the Uncontrollable [PDF]

, 2010
This is a written defense to accompany the MFA Thesis Exhibition You’re Gonna Be Ok, an installation encompassing video, and other sensory components.
Hendershot, John
core   +1 more source

Machine Learning–Based Multiparameter Performance Predictions of Ultra-Dense WDM FSO–FTTx Systems Under Diverse Weather Conditions

International Journal of Optics
Free-space optical (FSO) communication is vital for modern wireless systems due to its high data rates, energy efficiency, secure transmission, and cost-effectiveness.
Ashenafi Paulos Forsido, Demissie Jobir Gelmecha, Ram Sewak Singh   +2 more
doaj   +1 more source

Color-Selective Channel Modeling for Visible Light Communication (VLC)

IEEE Access
Color-selective attenuation, a specific case of wavelength- or frequency-selective attenuation, is an under-investigated but significant factor affecting the performance of color-modulated systems, particularly in Non-Line-of-Sight (NLOS) links ...
Igor S. C. Rodrigues, Leandro R. Ximenes, Rangel Arthur, Rafael Perez-Jimenez   +3 more
doaj   +1 more source