Simulation based performance of IEEE 802.11a for BPSK and QPSK modulation scheme

2011 ◽  
Author(s):  
S.R. Dhabre
Keyword(s):  
Modulation Scheme ◽  
Ieee 802.11A ◽  
Simulation Based

scholarly journals Analysis of Intercarrier Interference Cancellation Scheme in OFDM Systems

2012 ◽  
Vol 1 (1) ◽  
pp. 13-23
Author(s):  
Nasir Salh Almisbah ◽  
Elessaid S Saad
Keyword(s):  
Interference Cancellation ◽  
Orthogonal Frequency Division Multiplexing ◽  
Modulation Scheme ◽  
Intercarrier Interference ◽  
Frequency Division ◽  
Ofdm Systems ◽  
Ieee 802.11A ◽  
Wireless Standards ◽  
Carrier To Interference Ratio ◽  
Subcarrier Frequency

Abstract: Orthogonal Frequency Division Multiplexing (OFDM) is an emerging multi-carrier modulation scheme, which has been adopted for several wireless standards such as IEEE 802.11a and HiperLAN2. In OFDM systems, the performance is very sensitive to subcarrier frequency errors (offset). This paper shows the analysis and derivations of intercarrier interference (ICI) complex gain that used in self-cancellation scheme and its dependence on subcarrier frequency offset. Simulation shows that better improvement in performance is achieved for systems that use this cancellation scheme. Moreover, analysis and simulation show that theoretical carrier-to-interference ratio (CIR) for OFDM with cancellation scheme is greater than conventional one by more than 14dB.DOI: 10.18495/comengapp.11.013023

Inquiry Learning

2009 ◽  
Vol 23 (2) ◽  
pp. 117-127 ◽  
Author(s):  
Astrid Wichmann ◽  
Detlev Leutner
Keyword(s):  
Scientific Reasoning ◽  
Inquiry Learning ◽  
Instructional Support ◽  
Test Results ◽  
Knowledge Test ◽  
Simulation Based ◽  
Scientific Experiments ◽  
Specific Support ◽  
Science Classes

Seventy-nine students from three science classes conducted simulation-based scientific experiments. They received one of three kinds of instructional support in order to encourage scientific reasoning during inquiry learning: (1) basic inquiry support, (2) advanced inquiry support including explanation prompts, or (3) advanced inquiry support including explanation prompts and regulation prompts. Knowledge test as well as application test results show that students with regulation prompts significantly outperformed students with explanation prompts (knowledge: d = 0.65; application: d = 0.80) and students with basic inquiry support only (knowledge: d = 0.57; application: d = 0.83). The results are in line with a theoretical focus on inquiry learning according to which students need specific support with respect to the regulation of scientific reasoning when developing explanations during experimentation activities.

Employing Human Role-Players in Simulation-Based Training For Asymmetric and Unconventional Warfare

2004 ◽  
Author(s):  
L. L. Kusumoto ◽  
◽  
R. M. Gehorsam ◽  
B. D. Comer ◽  
J. R. Grosse
Keyword(s):  
Unconventional Warfare ◽  
Simulation Based ◽  
Role Players

Structured versus self-guided feedback in simulation-based training

2008 ◽  
Author(s):  
Steven Russell ◽  
David Dorsey ◽  
Michael Ford ◽  
Meredith Cracraft ◽  
Vivek Khare ◽  
...  
Keyword(s):  
Simulation Based
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