METHOD OF OUTPUTTING AUDIO SIGNAL AND MOBILE COMMUNICATION TERMINAL USING THE METHOD

2013 ◽  
Vol 133 (4) ◽  
pp. 2518
Author(s):  
Han-il Kim
Keyword(s):  
Mobile Communication ◽  
Audio Signal ◽  
Mobile Communication Terminal

Reconfigurable Planar Monopole Antenna for Fifth-Generation Mobile Communication System

2021 ◽  
Vol 36 (1) ◽  
pp. 67-74
Author(s):  
Peng Chen ◽  
Lihua Wang ◽  
Zhonghua Ma
Keyword(s):  
Mobile Communication ◽  
Monopole Antenna ◽  
Frequency Bands ◽  
Fifth Generation ◽  
Current Path ◽  
Longitudinal Length ◽  
Dc Bias ◽  
Planar Monopole Antenna ◽  
Mobile Communication Terminal ◽  
Frequency Current

A frequency reconfigurable planar monopole antenna for fifth-generation (5G) mobile communication terminal equipment is presented. The proposed antenna uses a meandered monopole, branch resonance and other techniques to make the antenna resonant in multiple frequency bands. The antenna is compact in size (115 mm × 55 mm × 0.8 mm) and has a longitudinal length less than one-tenth of the resonant wavelength (working at 1.79 GHz). The pin diode is designed between the planar meandered monopole antenna and branch. The current path of the high-frequency current on the antenna can be easily controlled by controlling the DC bias voltage of the diode, and the operating frequency of the antenna is switched between three frequency bands. The antenna is fed directly through a 50 Ω matched transmission line. The measured data of the antenna in the anechoic chamber show good consistency with simulation data. The radiation pattern of the antenna shows good omnidirectional characteristics and good frequency characteristics, with a maximum radiation gain of 13.6 dBi. Experimental results demonstrate that the antenna can meet the design requirements of 5G communication.

A New Type of Deaf-Mute Sign Language Recognition System Based on the Mobile Communciation Platform and Terminal Equipment

2013 ◽  
Vol 734-737 ◽  
pp. 2880-2886
Author(s):  
Si Ning Zhao ◽  
Mao Rong Wang ◽  
Zhen Wei
Keyword(s):  
Sign Language ◽  
Mobile Communication ◽  
Low Cost ◽  
Recognition System ◽  
Visual Methods ◽  
Language Recognition ◽  
Sign Language Recognition ◽  
New Type ◽  
Mobile Communication Terminal ◽  
Terminal Equipment

This paper presents a new type of deaf-mute sign language recognition system by combining mobile communication platform and the mobile communication terminal equipment. The system can implement the vision-based sign language recognition and translation. A Standard Sign Language Database is established in this system. Multi-national and multi-language sign language recognition can be completed by the following training using the database. In order to improve the accuracy of the recognition of similar sign language, an improved HMM sign language recognition method is used in this paper. The angle information of sign language which can be achieved by the traditional data-glove is introduced in the system on the basis of visual methods, makes the system taking into account these two recognition technology. The system can be implemented in ordinary mobile terminal equipment. Low cost and popularity of sign language recognition device can be realized. The deaf-mutes communicate for barrier-free anytime and anywhere by the application.

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