Mid‐symbol duration antenna transition approach for performance enhancement of spatial modulation

2018 ◽  
Vol 54 (8) ◽  
pp. 506-507 ◽  
Author(s):  
M. Arafa ◽  
M. Elwekeil ◽  
M. Dessoky
Keyword(s):  
Performance Enhancement ◽  
Spatial Modulation ◽  
Transition Approach ◽  
Symbol Duration

A Novel Spatial Modulation Scheme for MIMO System

2012 ◽  
Vol 198-199 ◽  
pp. 1573-1577 ◽  
Author(s):  
Yao Yuan Zhang ◽  
Zi Sheng Zhang ◽  
Ya Fei Lian ◽  
Qian Ding
Keyword(s):  
Rayleigh Fading ◽  
Mimo System ◽  
Spectrum Efficiency ◽  
Spatial Modulation ◽  
Modulation Scheme ◽  
Channel Correlation ◽  
Optimal Detector ◽  
Shift Keying ◽  
Correlated Channel ◽  
Symbol Duration

A novel spatial modulation scheme based on Space-Shift Keying (SSK) modulation is introduced for MIMO system. The proposed scheme doubles the spectrum efficiency of SSK by assigning unique symbols to different combinations of antenna indexes per symbol duration, while retaining the SSK’s inherent advantages. The optimal detector is utilized at the receiver simultaneously. Analytical and simulation results show: 1) in Rayleigh fading channel scenario，the obtained gains in SNR for the same spectral efficiency of the proposed scheme over amplitude/phase modulation (APM), vertical Bell Labs layered structure (V-BLAST) and spatial modulation (SM) systems are obvious; 2) under the correlated channel assumption, the new one still outperforms SM and V-BLAST clearly, which indicates the new one is more robust in the presence of channel correlation.

Performance Enhancement, Creativity and Mental Training

2003 ◽  
Author(s):  
M. Bar-Eli ◽  
O. Lowengart ◽  
J. Goldberg ◽  
S. Epstein ◽  
R. D. Fosbury
Keyword(s):  
Performance Enhancement ◽  
Mental Training

Effective performance improvement of organic thin film transistors with multi-layer modifications

2020 ◽  
Vol 91 (3) ◽  
pp. 30201
Author(s):  
Hang Yu ◽  
Jianlin Zhou ◽  
Yuanyuan Hao ◽  
Yao Ni
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Performance Enhancement ◽  
Organic Thin Film Transistors ◽  
Electrical Performance ◽  
Hole Injection ◽  
Organic Thin Film ◽  
Effective Performance ◽  
Significant Performance ◽  
P Type

Organic thin film transistors (OTFTs) based on dioctylbenzothienobenzothiophene (C8BTBT) and copper (Cu) electrodes were fabricated. For improving the electrical performance of the original devices, the different modifications were attempted to insert in three different positions including semiconductor/electrode interface, semiconductor bulk inside and semiconductor/insulator interface. In detail, 4,4′,4′′-tris[3-methylpheny(phenyl)amino] triphenylamine (m-MTDATA) was applied between C8BTBTand Cu electrodes as hole injection layer (HIL). Moreover, the fluorinated copper phthalo-cyanine (F16CuPc) was inserted in C8BTBT/SiO2 interface to form F16CuPc/C8BTBT heterojunction or C8BTBT bulk to form C8BTBT/F16CuPc/C8BTBT sandwich configuration. Our experiment shows that, the sandwich structured OTFTs have a significant performance enhancement when appropriate thickness modification is chosen, comparing with original C8BTBT devices. Then, even the low work function metal Cu was applied, a normal p-type operate-mode C8BTBT-OTFT with mobility as high as 2.56 cm2/Vs has been fabricated.

Performance enhancement of normal contact ratio gearing system through correction factor

2019 ◽  
Vol 13 (3) ◽  
pp. 5242-5258
Author(s):  
R. Ravivarman ◽  
K. Palaniradja ◽  
R. Prabhu Sekar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Correction Factor ◽  
Bending Strength ◽  
Performance Enhancement ◽  
Transmission Ratio ◽  
Contact Ratio ◽  
Element Analysis ◽  
Normal Contact ◽  
Root Region

As lined, higher transmission ratio drives system will have uneven stresses in the root region of the pinion and wheel. To enrich this agility of uneven stresses in normal-contact ratio (NCR) gearing system, an enhanced system is desirable to be industrialized. To attain this objective, it is proposed to put on the idea of modifying the correction factor in such a manner that the bending strength of the gearing system is improved. In this work, the correction factor is modified in such a way that the stress in the root region is equalized between the pinion and wheel. This equalization of stresses is carried out by providing a correction factor in three circumstances: in pinion; wheel and both the pinion and the wheel. Henceforth performances of this S+, S0 and S- drives are evaluated in finite element analysis (FEA) and compared for balanced root stresses in parallel shaft spur gearing systems. It is seen that the outcomes gained from the modified drive have enhanced performance than the standard drive.

Performance Enhancement in OSI Network Model using Fuzzy Queue

2011 ◽  
Vol 4 (4) ◽  
pp. 377-386
Author(s):  
B.Palpandi B.Palpandi ◽  
◽  
Dr. G.Geetharamani Dr. G.Geetharamani ◽  
J.Arun Pandian
Keyword(s):  
Network Model ◽  
Performance Enhancement

Secure Spatial Modulation Based on Dynamic Multi-Parameter WFRFT

2018 ◽  
Vol E101.B (11) ◽  
pp. 2304-2312 ◽  
Author(s):  
Qian CHENG ◽  
Jiang ZHU ◽  
Junshan LUO
Keyword(s):  
Spatial Modulation
Sign in / Sign up

Export Citation Format

Share Document