Two ultrasonic transducer through‐wall communication system analysis.

2008 ◽  
Vol 124 (4) ◽  
pp. 2487-2487
Author(s):  
Henry A. Scarton
2013 ◽  
Vol 281 ◽  
pp. 59-64 ◽  
Author(s):  
Xiao Jun Xue ◽  
Yu Zheng Zheng

Through analyzing the transmission characteristics of Ultrasonic on Ultrasonic transducer, this paper gets channel parameters of ultrasonic transmission. And a new model of ultrasonic channel is given in Matlab/Simulation environment. Using this model, FSK-DSSS communication system is realized according to theoretical analysis and experimental test. Finally this paper shows relationship between the SNR and Bit Error Rate, which proves that this system has good noise immunity. Data can be demodulated successfully when the SNR is above -10 dB


2014 ◽  
Vol 23 (2) ◽  
pp. 104-111 ◽  
Author(s):  
Mary Ann Abbott ◽  
Debby McBride

The purpose of this article is to outline a decision-making process and highlight which portions of the augmentative and alternative communication (AAC) evaluation process deserve special attention when deciding which features are required for a communication system in order to provide optimal benefit for the user. The clinician then will be able to use a feature-match approach as part of the decision-making process to determine whether mobile technology or a dedicated device is the best choice for communication. The term mobile technology will be used to describe off-the-shelf, commercially available, tablet-style devices like an iPhone®, iPod Touch®, iPad®, and Android® or Windows® tablet.


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