Zobrazeno 1 - 10
of 19
pro vyhledávání: '"JaeHwang Yu"'
Autor:
Jaehwang Yu, Kuik Chung
Publikováno v:
International Journal of Satellite Communications and Networking. 29:283-291
This paper presents the system and architecture of Satellite-Digital Multimedia Broadcasting (S-DMB) in Korea. TU Media Corp., the S-DMB service company, now delivers 21 video channels, 16 audio channels including premium channels to subscribers in K
Publikováno v:
AEU - International Journal of Electronics and Communications. 65:305-311
With the recent growth of IEEE 802.11 based Wireless Local Area Networks (WLANs), there has been new research attempts to use the WLAN technology for location estimation applications in deep indoor environments where traditional locating algorithms a
Autor:
Seongsoo Park, Jaehwang Yu
Publikováno v:
SoftCOM
In this study, we developed UHF RFID reader on microSD which can be inserted into external memory on smartphone. A RFID application on smartphone controls RFID reader on microSD card and acquires information from RFID tag via SD interface which mainl
Publikováno v:
IEICE Transactions on Communications. :2929-2932
Receiver enhancement at mobile terminals such as using receiver diversity is a way of achieving greater downlink capacity. The enhancement, however, is achieved not instantaneously by a network operator but gradually by the individual users that choo
Publikováno v:
IEEE Communications Letters. 13:655-657
Fast transmission control protocol (TCP) was previously proposed for high capacity network environments with long delay, and "FAST TCP with Snoop" performs better than conventional TCP enhancements in mobile wireless network environments. However, FA
Autor:
Christoph Spiegel, Jaehwang Yu, Sebastian Rickers, Seongsoo Park, Guido H. Bruck, Rami Lee, Peter Jung
Publikováno v:
2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010).
The IEEE 802.15.4 standard was brought up for the use in wireless personal area networks (WPANs) and is widely known as ZigBee. It employs spread spectrum techniques to obtain a robust transmission at comparatively low data rates of up to 250 kbit/s.
Autor:
Rami Lee, Guido H. Bruck, Peter Jung, Christoph Spiegel, Sebastian Rickers, Jaehwang Yu, Woojin Shim
Publikováno v:
2009 2nd International Symposium on Applied Sciences in Biomedical and Communication Technologies.
The IEEE standard 802.15.4 for low-rate wireless personal area networks and ZigBee will play an important role for low power networks. From the authors' point of view, ZigBee might even become a key technology for such networks. A low complexity and
Publikováno v:
ICCCN
In multi-access network environments, interworking technologies has become a very important issue these days. This interworking would deliver optimized services to users and also benefit service providers by reducing network construction and maintena
Publikováno v:
SPIE Proceedings.
In this paper, we investigate the use of existing audio codecs for the purpose of a high quality color ring-back- tone service. First of all, we exploit the limitations of the enhanced variable rate codec (EVRC) in a view of music quality because EVR
Autor:
Rami Lee, Seokyong Shon, Joungchel Kim, J.M. Cheong, Dongwoo Kim, Jaehwang Yu, Jung Hwa Wui, Sanghoon Seo
Publikováno v:
VTC-2005-Fall. 2005 IEEE 62nd Vehicular Technology Conference, 2005..
In this paper we present the results of measurements using a wideband wireless channel sounder and its analysis methods to propose the channel models of 2.35 GHz frequency band for wireless high speed portable internet which is named Wireless Broadba