Results 261 to 270 of about 38,989 (313)
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13th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 2000
Instantaneous amplitude, instantaneous phase, and instantaneous frequency were calculated from a GPR data set acquired on St. Croix, U.S. Virgin Islands. The data was cross plotted to search for any anomalous data clusters. These clusters were separated to determine their cause and determine the implications of the clustering. This is the first step in
Seth R. Lemke, Leonard C. Mankowski
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Instantaneous amplitude, instantaneous phase, and instantaneous frequency were calculated from a GPR data set acquired on St. Croix, U.S. Virgin Islands. The data was cross plotted to search for any anomalous data clusters. These clusters were separated to determine their cause and determine the implications of the clustering. This is the first step in
Seth R. Lemke, Leonard C. Mankowski
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2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
Recently in order to investigate the distribution of water, liquid and solid, in the upper portions of the crust of Mars planet two different instruments are actives, the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) and SHAallow RADar (SHARAD).
Marco Iorio +4 more
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Recently in order to investigate the distribution of water, liquid and solid, in the upper portions of the crust of Mars planet two different instruments are actives, the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) and SHAallow RADar (SHARAD).
Marco Iorio +4 more
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IEEE Transactions on Vehicular Technology, 2001
Based on the GSM radio architecture, the general packet radio service (GPRS) provides users data connections with variable data rates and high bandwidth efficiency. In the GPRS service, allocation of physical channels is flexible, i.e., multiple channels can be allocated to a user.
Phone Lin, Yi-Bing Lin
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Based on the GSM radio architecture, the general packet radio service (GPRS) provides users data connections with variable data rates and high bandwidth efficiency. In the GPRS service, allocation of physical channels is flexible, i.e., multiple channels can be allocated to a user.
Phone Lin, Yi-Bing Lin
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Computer Networks, 2006
In cellular wireless networks, location management is an important mechanism that enables network to discover the current attachment point of a mobile so as to facilitate successful information delivery. Although the design of optimal location management has been studied extensively for GSM, it is surprising that little, or possibly no, attention has ...
Ning Chai, Boon Sain Yeo, Yong Huat Chew
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In cellular wireless networks, location management is an important mechanism that enables network to discover the current attachment point of a mobile so as to facilitate successful information delivery. Although the design of optimal location management has been studied extensively for GSM, it is surprising that little, or possibly no, attention has ...
Ning Chai, Boon Sain Yeo, Yong Huat Chew
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A mobility management strategy for gprs
IEEE Transactions on Wireless Communications, 2003In general packet radio service (GPRS), a mobile station (MS) is tracked at the cell level during packet transmission, and is tracked at the routing-area (RA) level when no packet is delivered. A READY timer (RT) mechanism was proposed in 3GPP 23.060 to determine when to switch from cell tracking to RA tracking.
Yi-Bing Lin, Shun-Ren Yang
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Advanced GPR for archaeological survey
2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013An array GPR system equipped with 8 transmitting and 8 receiving antennas has been developed at Tohoku University, Japan. It is a Stepped Frequency Continuous Wave system and operates at 50MHz-1.5GHz. The maximum speed of data acquisition is 7km/h, when the data is acquired every 1cm density.
Motoyuki Sato +2 more
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IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2005
The paper presents results from an analysis of traffic measurements taken at the G/sub b/ interface of a GPRS network. Data was captured in one-week long data sets between November 2002 and March 2004. The paper provides new results, based on three of these data sets, and extends our previous work (Ivanovich, M.
Milosh V. Ivanovich +3 more
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The paper presents results from an analysis of traffic measurements taken at the G/sub b/ interface of a GPRS network. Data was captured in one-week long data sets between November 2002 and March 2004. The paper provides new results, based on three of these data sets, and extends our previous work (Ivanovich, M.
Milosh V. Ivanovich +3 more
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Scalable gateway GPRS support node for GPRS/UMTS networks
Proceedings IEEE 56th Vehicular Technology Conference, 2003In GPRS (general packet radio service) and UMTS (Universal Mobile Telecommunications System) networks, GGSN (gateway GPRS support node) serves as a default gateway while MSs (mobile stations) connect to outside networks such as the Internet. According to the GPRS/UMTS specifications, a fixed GGSN is assigned to serve an MS that attaches to the network ...
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17th International Conference on Advanced Information Networking and Applications, 2003. AINA 2003., 2003
We study the performance of VoIP over GPRS by simulation of standard GPRS system with some improvement for real time attributes. It is showed that the VoIP over GPRS has more capacity than circuit switch voice while guaranteeing acceptable QoS. With one radio frequency, the circuit switch system can provide 7 voice connections, while VoIP over GPRS can
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We study the performance of VoIP over GPRS by simulation of standard GPRS system with some improvement for real time attributes. It is showed that the VoIP over GPRS has more capacity than circuit switch voice while guaranteeing acceptable QoS. With one radio frequency, the circuit switch system can provide 7 voice connections, while VoIP over GPRS can
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WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466), 2003
GPRS is the new packet-oriented data service for GSM. Soon it will be possible to take advantage of the features provided by GPRS for Internet access like fast connection set-up, volume-based charging and staying on-line for long periods. For non-real-time Internet applications TCP is the applied transport protocol.
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GPRS is the new packet-oriented data service for GSM. Soon it will be possible to take advantage of the features provided by GPRS for Internet access like fast connection set-up, volume-based charging and staying on-line for long periods. For non-real-time Internet applications TCP is the applied transport protocol.
openaire +1 more source