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New Testing Solutions for CDMA/EVDO Base Station RF Problems
White Papers Through this webcast one will learn how to solve the cellular/PCS base station RF problems. The jobs of technicians and RF engineers are getting more complicated with the roll out of new technologies such as EVDO, WCDMA and HSDPA.
[May 12, 2006, 0:00]
Propagation Loss Models Characterization for GSM 900MHz at Kuala Lumpur and Putrajaya
White Papers Propagation loss modelling of cellular mobile system is important for coverage design and prediction. Thus, this paper is to define a propagation loss model for mobile communication (GSM) to describe the signal quality of 900MHz cellular mobile...
[July 29, 2007, 23:19]
ICAM: Integrated Cellular and Ad-Hoc Multicast
White Papers This paper proposes ICAM, Integrated Cellular and Ad-hoc Multicast, to increase 3G multicast throughput through opportunistic use of ad-hoc relays. In third Generation (3G) wireless data networks, multicast throughput decreases with the increase in...
[December 13, 2006, 0:00]
Performance Analysis of Multiantenna WiMAX Systems Over Frequency-Selective Fading Channels
White Papers Simulation results corroborate the proposed analysis for a IEEE 802.16-2004 cellular system over different propagation scenarios. The proposed method takes into account the effects of the correlation of the channel gains over the space-frequency...
[April 22, 2009, 1:24]
Preserving User Location Privacy in Mobile Data Management Infrastructures
White Papers This paper suggests a framework where uncertainty can be controlled to provide high quality and privacy-preserving services, and investigate how such a framework can be realized in the GPS and cellular network systems.
[November 2, 2008, 23:00]
CIA World Factbook
Downloads Several regional maps have also been updated to reflect boundary changes and place name spelling changes.Each country listing includes:Flag GraphicMap ImageBackground, including a Historical SummaryGeography, including Location, Geographic...
[April 21, 2005, 8:00]
IPWireless launches 3G mobile TV technology
News Another contender for mobile phone TV was unveiled in London on Wednesday, when IPWireless demonstrated its TDtv system transmitting multiple channels over the air from a cellular base station. Much of the technology exists already, we're using a...
[January 18, 2006, 16:55]
Startup launches with promise of cheaper wireless VoIP
News A single base station will handle 30,000 subscribers using 300 minutes per month, based on current cellular usage models," Chris Whiteley, xG's vice president of business development told ZDNet UK. Establishing a base station should cost in the...
[March 28, 2006, 9:15]
New Wi-Fi challenges 3G
News The signals themselves can get so misdirected they actually interfere with each other as they find their way to a handset or cellular base station's antenna, said Jon Hambidge, senior director of marketing for IPWireless, one of the companies that...
[September 30, 2002, 7:50]
Inmarsat broadband satellite hits orbit
News When tests are complete, it will provide broadband connectivity from orbit at a cost comparable to roaming on cellular systems. We have 'acquired' the satellite — our ground station in Canada can see the satellite, and control it," said John...
[November 9, 2005, 16:55]
3G tech gets cheaper as standardisation takes hold
News We believe further cost reductions delivered at the chip level for key 3G networking products [baseband, transceiver, and power amplifier subsystems] will help jump-start expansion and upgrades to data-enabled cellular networks," Lavey said.
[June 2, 2004, 17:35]
Q&A: Mobile phone inventor says dream isn't real yet
News I called him and said, 'Joe, I'm calling you from a real portable cellular telephone. We are going to start, first of all, with a really good cellular phone that works all the time. There was no technical reason why cellular shouldn't be as...
[April 7, 2003, 15:37]
Japan gets to work on 4G comms
News The Singapore branch, with help from other Asian bodies, hopes to meld cellular networks, Wi-Fi hot spots and "street cells" -- a wireless network based on roadside antennas and transmitters -- into one system that lets drivers tap into online...
[May 6, 2003, 15:47]
Cicero launches Symbian dual-mode client
News Dual-mode devices are able to route calls either through an office or home Wi-Fi connection — thus saving call costs — or through a standard cellular connection. It is also more targeted at "transferring the call from Wi-Fi to cellular as you move...
[November 2, 2006, 13:06]
Location-based services expected to rocket
News CSR has developed a system that augments GPS to improve the availability of location data by using the cellular timing measurements phones take during normal operation. But adding cellular triangulation tech to a GPS-enabled phone could give it a...
[February 12, 2008, 10:29]
Schools panic over WiFi
Blog Comment In a classroom of wireless enabled laptops accessing a wireless network, the signal strength in the data pulses is in the order of several volts per metre and usually higher than living close to a cellular phone basestation.
[November 22, 2006, 10:16]
Operators want fewer new mobile masts
News T-Mobile recently announced it was investing in Ubiquisys, a UK-based company that makes femtocells, which are mini-base-stations that can be installed in homes and offices to route cellular data onto fixed-line networks.
[March 6, 2008, 14:38]
Jasper Wireless targets untapped M2M market
News Jasper's network is designed for point-of-sale devices, vehicles, burglar alarms and equipment such as photocopiers, all of which can have a $30-$60 (£15-£30) cellular modem built in. Jasper is working with Wavecom to provide a "black box" M2M...
[October 9, 2007, 18:22]
Cellphone makers practise airborne calls
News An onboard cellular base station the size of a laptop was linked to a Globalstar satellite, which funnelled calls and short text messages to Earth-bound cell phones, Qualcomm said. Airborne cellphone service took a test flight last Thursday, in a...
[July 19, 2004, 10:25]
Rupert Goodwins' Diary
Blog The box sticks to the fur of the hapless mammals and sends data by text messages when it finds itself within range of a cellular base station. Wednesday 5/6/2002 And staying north of the Border, news from St Andrews of text-messaging seals.
[June 7, 2002, 18:15]
