http://www.sciencedaily.com/news/computers_math/wifi/ Wireless News. Read all about WiFi research from leading research institutes around the world. Full-text, images, free. en-us Thu, 26 Nov 2009 01:05:01 EST Thu, 26 Nov 2009 01:05:01 EST 60 http://www.sciencedaily.com/images/logosmall.gif http://www.sciencedaily.com/news/computers_math/wifi/ For more science articles, visit ScienceDaily. http://www.sciencedaily.com/releases/2009/11/091104101543.htm Researchers are working to develop futuristic communications systems that could help protect frontline troops. Building on work completed recently for the UK Ministry of Defence, the project is aimed at investigating the use of arrays of highly specialized antennas that could be worn by combat troops to provide covert short-range person-to-person battleground communications. Fri, 13 Nov 2009 14:00:00 EST http://www.sciencedaily.com/releases/2009/11/091104101543.htm http://www.sciencedaily.com/releases/2009/11/091102112050.htm A telemedicine system based on a modified version of the Bluetooth wireless protocol can transfer patient data, such as medical images from patient to the health-care provider's mobile device for patient assessment almost four times as fast as conventional Bluetooth and without the intermittent connectivity problems. Thu, 05 Nov 2009 02:00:00 EST http://www.sciencedaily.com/releases/2009/11/091102112050.htm http://www.sciencedaily.com/releases/2009/11/091102121632.htm A wireless digital "plaster" that can monitor vital signs continuously and remotely is being tried out with patients and healthy volunteers in a new clinical trial run by researchers in the UK. The digital "plaster" or "patch" is a disposable device that sticks to a patient's chest. It is designed to allow patients to have their health monitored continuously without being wired up to bulky, fixed monitoring machines. Mon, 02 Nov 2009 17:00:00 EST http://www.sciencedaily.com/releases/2009/11/091102121632.htm http://www.sciencedaily.com/releases/2009/10/091001095608.htm For the first time, researchers have demonstrated 60 GHz broadband radio for wireless transmission of HD video data, HDTV, live. The findings mean more robust transmissions that are less susceptible to interference. Sun, 11 Oct 2009 17:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091001095608.htm http://www.sciencedaily.com/releases/2009/10/091008161900.htm Robots equipped with wireless and sensing capabilities are available for use in the home. But the safety and privacy risks of these devices are not yet adequately addressed, according to a new study. Fri, 09 Oct 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091008161900.htm http://www.sciencedaily.com/releases/2009/10/091007091748.htm Government agencies and other organizations planning to use WiMAX -- Worldwide Interoperability for Microwave Access -- networks can get technical advice on improving the security of their systems from a draft computer security guide prepared by NIST. Fri, 09 Oct 2009 02:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091007091748.htm http://www.sciencedaily.com/releases/2009/10/091006104314.htm Researchers in Europe have unveiled a miniaturized and wireless 8-channel EEG system. The system is suited for remote monitoring of patients in their daily environment, resulting in more natural readings and greatly increasing the patient's comfort. Tue, 06 Oct 2009 00:00:00 EDT http://www.sciencedaily.com/releases/2009/10/091006104314.htm http://www.sciencedaily.com/releases/2009/09/090908103638.htm Antennas for the latest implanted medical devices are being developed in the UK. In the near future, in-body medical devices such as pacemakers will use radio frequency (RF) technology to improve healthcare for patients. A low-powered, two-way wireless communications system linking an in-body device to a monitoring system can provide up-to-the minute patient data to allow doctors to adjust treatment as soon as it is needed. Thu, 24 Sep 2009 23:00:00 EDT http://www.sciencedaily.com/releases/2009/09/090908103638.htm http://www.sciencedaily.com/releases/2009/08/090814192853.htm Laws aimed at tackling illegal use of wireless internet connections are restricting attempts to increase broadband access, according to new research. Mon, 17 Aug 2009 02:00:00 EDT http://www.sciencedaily.com/releases/2009/08/090814192853.htm http://www.sciencedaily.com/releases/2009/07/090729140243.htm Powerful new radio technologies that promise blisteringly fast WiFi have been given a boost by a team of researchers’ cutting-edge work on miniscule microchips. Thu, 13 Aug 2009 08:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090729140243.htm http://www.sciencedaily.com/releases/2009/07/090701150851.htm Researchers have developed a groundbreaking middleware platform that could lead to thousands of new applications in a range of industries. Beginning with in-car electronics, the platform can access the functionality, but hide the underlying complexity, of embedded sensors, making development and deployment of new services a snap. Tue, 07 Jul 2009 23:00:00 EDT http://www.sciencedaily.com/releases/2009/07/090701150851.htm http://www.sciencedaily.com/releases/2009/06/090626091136.htm For those who are caring for elderly parents, peace of mind is hard to come by. And, for their parents, dignity is hard to retain. But researchers hopes to ease worries and frustrations by designing an affordable in-home health-monitoring system that will notify caregivers, via smartphones or PDAs, if their loved ones need attention. Sat, 27 Jun 2009 05:00:00 EDT http://www.sciencedaily.com/releases/2009/06/090626091136.htm http://www.sciencedaily.com/releases/2009/06/090603131441.htm Engineers have built a fast, ultra-broadband, low-power radio chip, modeled on the human inner ear, that could enable wireless devices capable of receiving cell phone, Internet, radio and television signals. Thu, 04 Jun 2009 14:00:00 EDT http://www.sciencedaily.com/releases/2009/06/090603131441.htm http://www.sciencedaily.com/releases/2009/05/090514222025.htm Wireless, personal computers used by cancer patients to log their symptoms help improve the patients' care and further cancer research, according to a new study. Mon, 18 May 2009 05:00:00 EDT http://www.sciencedaily.com/releases/2009/05/090514222025.htm http://www.sciencedaily.com/releases/2009/04/090416185724.htm Scientists have developed an irrigation management system that would be easy to install on golf courses. It is based on networks of wireless sensors. Thu, 23 Apr 2009 08:00:00 EDT http://www.sciencedaily.com/releases/2009/04/090416185724.htm http://www.sciencedaily.com/releases/2009/04/090420085047.htm It is difficult and expensive to create wireless networks in sparsely populated areas or to cover a whole city, for example. Each wireless connection point requires, notwithstanding the name, a cable with a connection to the Internet. But these problems are now being solved. Tue, 21 Apr 2009 17:00:00 EDT http://www.sciencedaily.com/releases/2009/04/090420085047.htm http://www.sciencedaily.com/releases/2009/04/090407145205.htm A new, simpler programming language for wireless sensor networks is designed for easy use by geologists who might use them to monitor volcanoes and biologists who rely on them to understand birds' nesting behaviors, for example. Researchers have written the language with the novice programmer in mind. Tue, 14 Apr 2009 23:00:00 EDT http://www.sciencedaily.com/releases/2009/04/090407145205.htm http://www.sciencedaily.com/releases/2009/04/090408140223.htm By combining the results of a number of powerful techniques for studying material structure at the nanoscale, researchers believe they have settled a long-standing debate over the source of the unique electronic properties of a material with potentially great importance for wireless communications. Tue, 14 Apr 2009 20:00:00 EDT http://www.sciencedaily.com/releases/2009/04/090408140223.htm http://www.sciencedaily.com/releases/2009/04/090403114925.htm Mobile users want better video calls, streaming television and faster downloads, placing more demands on the limited radio spectrum available to operators. Could handsets that intelligently sense their radio environment and opportunistically grab free bandwidth be a solution? Mon, 13 Apr 2009 02:00:00 EDT http://www.sciencedaily.com/releases/2009/04/090403114925.htm http://www.sciencedaily.com/releases/2009/03/090308121655.htm With much of the mobile world yet to migrate to 3G mobile communications, let alone 4G, researchers are already working on a new technology able to deliver data wirelessly up to 12.5Gb/s. Sat, 14 Mar 2009 23:00:00 EDT http://www.sciencedaily.com/releases/2009/03/090308121655.htm http://www.sciencedaily.com/releases/2009/02/090211094038.htm A record breaking amplifier for high capacity wireless communications systems has been developed. New imaging and high capacity wireless communications systems are one step closer to reality, thanks to a new millimeter wave amplifier. Thu, 12 Feb 2009 05:00:00 EST http://www.sciencedaily.com/releases/2009/02/090211094038.htm http://www.sciencedaily.com/releases/2009/02/090206101601.htm Electronic implants that dispense medicines automatically or via a wireless medical network are on the horizon. Scientists warn of the security risks. Fri, 06 Feb 2009 00:00:00 EST http://www.sciencedaily.com/releases/2009/02/090206101601.htm http://www.sciencedaily.com/releases/2009/01/090129113318.htm In less than two years, WARP -- a new open-source wireless research platform -- has found its way into laboratories at Nokia, MIT, Toyota, NASA, Ericsson and dozens of other organizations. WARP is already being used to test everything from "cognitive" wireless networks and low-cost wireless Internet in rural India to futuristic "unwired" spacecraft. Wed, 04 Feb 2009 05:00:00 EST http://www.sciencedaily.com/releases/2009/01/090129113318.htm http://www.sciencedaily.com/releases/2009/01/090122161953.htm Rapid transfer of a high-definition movie from a PC to a cell phone -- plus a host of other media and data possibilities -- is approaching reality. Mon, 26 Jan 2009 17:00:00 EST http://www.sciencedaily.com/releases/2009/01/090122161953.htm http://www.sciencedaily.com/releases/2009/01/090107092722.htm Could a concept from information technology familiar to online file sharers be exploited to reduce road congestion and even traffic accidents? That is the question answered in the affirmative by researchers in California. Thu, 08 Jan 2009 08:00:00 EST http://www.sciencedaily.com/releases/2009/01/090107092722.htm http://www.sciencedaily.com/releases/2008/11/081117082425.htm Wireless experts believe that, by 2017, personal networks will have to cope with at least a thousand devices, like laptops, telephones, mp3 players, games, sensors and other technology. To link these devices will require a ‘Network of Everything’. It represents an astonishing challenge, but European researchers believe that they are moving towards the solution. Mon, 24 Nov 2008 14:00:00 EST http://www.sciencedaily.com/releases/2008/11/081117082425.htm http://www.sciencedaily.com/releases/2008/11/081118071424.htm Shall I make this call with the landline, mobile or VOIP? Laptop or PDA? Let the phone and the network decide for themselves, say European researchers planning a future of seamless communications. Tue, 18 Nov 2008 00:00:00 EST http://www.sciencedaily.com/releases/2008/11/081118071424.htm http://www.sciencedaily.com/releases/2008/11/081109074856.htm A new technology promises to dramatically lower the costs of satellite bandwidth, potentially bridging the digital divide and enabling satellites to deliver TV, internet and telephony services via satellite. The technical problems are solved, now the research team is working hard on the business case. Mon, 10 Nov 2008 05:00:00 EST http://www.sciencedaily.com/releases/2008/11/081109074856.htm http://www.sciencedaily.com/releases/2008/11/081104080934.htm New mathematical algorithms for the next radio chip generation are under development. According to one of the mathematicians: "In the future, mobile devices will provide customers with services ranging from telephony and internet to mobile TV and remote banking, anytime, anywhere. It is impossible to realize the necessary, extremely high data transfer rates within the frequency bands used today (approximately 1-3GHz)." The new project serves to enable the development of low-cost wireless chips that can operate in a frequency range of up to 100GHz. Tue, 04 Nov 2008 00:00:00 EST http://www.sciencedaily.com/releases/2008/11/081104080934.htm http://www.sciencedaily.com/releases/2008/10/081009111035.htm Dozens of cars in the Boston area are testing the latest generation of an MIT mobile-sensor network for traffic analysis that could help drivers cut their commuting time, alert them to potential engine problems and more. Fri, 17 Oct 2008 14:00:00 EDT http://www.sciencedaily.com/releases/2008/10/081009111035.htm http://www.sciencedaily.com/releases/2008/10/081006155943.htm It is not uncommon for a few boxes of valuable goods to disappear from palettes on the way to retail outlets. That is why researchers in Germany are working on a new technical platform to safeguard such items. This involves using wireless ad-hoc sensor networks to create logistical information systems that allow them to be tracked along the entire distribution chain. Fri, 17 Oct 2008 02:00:00 EDT http://www.sciencedaily.com/releases/2008/10/081006155943.htm http://www.sciencedaily.com/releases/2008/10/081006130548.htm Researchers are developing a new generation of wireless communications based on visible light instead of radio waves. This capability would piggyback data communications capabilities on low-power light emitting diodes or LEDs to create "smart lighting." This technology would also be more secure and faster than current network technology -- all over existing power lines with low power consumption, high reliability and no electromagnetic interference. Thu, 16 Oct 2008 11:00:00 EDT http://www.sciencedaily.com/releases/2008/10/081006130548.htm http://www.sciencedaily.com/releases/2008/09/080925114126.htm Rooting out Wi-Fi "dead zones" in citywide wireless networks is an expensive proposition. The paucity of techniques for mapping areas that lack coverage is an impediment, both for pre-deployment and post-deployment testing. New research could change that. A new test method lets engineers refine their networks using readily available information about basic topography, street locations and general land use. Tue, 30 Sep 2008 05:00:00 EDT http://www.sciencedaily.com/releases/2008/09/080925114126.htm http://www.sciencedaily.com/releases/2008/09/080922185547.htm A new kind of autonomous wheelchair under development can learn all about the locations in a given building, and then take its occupant to a given place in response to a verbal command. Mon, 29 Sep 2008 11:00:00 EDT http://www.sciencedaily.com/releases/2008/09/080922185547.htm http://www.sciencedaily.com/releases/2008/09/080915083727.htm In the movie The Game, the character is hounded by villains and left for dead in Mexico in an intense version of an alternative reality game. Minus the Hollywood bravado, games that merge the virtual with the real could be the next entertainment revolution. Tue, 16 Sep 2008 11:00:00 EDT http://www.sciencedaily.com/releases/2008/09/080915083727.htm http://www.sciencedaily.com/releases/2008/09/080905153646.htm Technologies used today by companies, such as Direct TV, Iridium Satellite, Bluetooth and Globalstar, are based on satellite communications efforts started at Virginia Tech four decades ago in its Bradley Department of Electrical and Computer Engineering. New technologies, such as cognitive radio, will be common within 10 years. Fri, 05 Sep 2008 00:00:00 EDT http://www.sciencedaily.com/releases/2008/09/080905153646.htm http://www.sciencedaily.com/releases/2008/08/080806154804.htm A WiMAX-based connection to the Internet will enable real-time monitoring of potentially dangerous active volcanoes. For effective monitoring of volcanic activity, scientists want to know what is happening in real time, not the pattern of events last week. Fri, 08 Aug 2008 08:00:00 EDT http://www.sciencedaily.com/releases/2008/08/080806154804.htm http://www.sciencedaily.com/releases/2008/08/080801074734.htm A WiMAX-based connection to the internet enables fire-monitoring efforts in remote and mountainous regions. A forest fire remote monitoring system has been successfully tested in Portugal that could prevent the destruction of millions of hectares, as well as save lives. Mon, 04 Aug 2008 05:00:00 EDT http://www.sciencedaily.com/releases/2008/08/080801074734.htm http://www.sciencedaily.com/releases/2008/07/080730222359.htm The ideal of affordable wireless broadband for all, and as an added bonus better quality services in urban areas, is a lot closer thanks to recent advances made by European researchers. Sat, 02 Aug 2008 14:00:00 EDT http://www.sciencedaily.com/releases/2008/07/080730222359.htm http://www.sciencedaily.com/releases/2008/07/080731140319.htm CSIRO is developing new wireless technologies for locating, tracking, sensing and communicating in areas where global positioning systems do not work. Fri, 01 Aug 2008 02:00:00 EDT http://www.sciencedaily.com/releases/2008/07/080731140319.htm http://www.sciencedaily.com/releases/2008/07/080718080755.htm Video games — often regarded as nothing more than mindless entertainment for lethargic kids and teens — are proving to be an effective, new tool to motivate patients to perform rehabilitation exercises. The Burn Center is also employing a special add-on to the Nintendo Wii system, Guitar Hero III. Mon, 21 Jul 2008 14:00:00 EDT http://www.sciencedaily.com/releases/2008/07/080718080755.htm http://www.sciencedaily.com/releases/2008/06/080619133111.htm The rapid convergence of social networks, mobile phones and global positioning technology has given engineers the ability to create something they call "virtual sticky notes," site-specific messages that people can leave for others to pick up on their mobile phones. Sat, 21 Jun 2008 20:00:00 EDT http://www.sciencedaily.com/releases/2008/06/080619133111.htm http://www.sciencedaily.com/releases/2008/06/080606134607.htm The same Global Positioning System (GPS) technology used to track vehicles is now being used to track cows. But animal scientists have taken tracking several steps further with a Walkman-like headset that enables him to "whisper" wireless commands to cows to control their movements across a landscape --- and even remotely gather them into a corral. Sat, 07 Jun 2008 14:00:00 EDT http://www.sciencedaily.com/releases/2008/06/080606134607.htm http://www.sciencedaily.com/releases/2008/05/080520214357.htm A major drawback of the latest generation video products and applications has been the complex requirements for coding and decoding signals. An alternative put forward by European researchers turns the traditional video coding paradigm on its head. Thu, 22 May 2008 02:00:00 EDT http://www.sciencedaily.com/releases/2008/05/080520214357.htm http://www.sciencedaily.com/releases/2008/05/080516164822.htm Researchers have confirmed that underground tunnels -- generally a difficult setting for radios -- can have a frequency "sweet spot" at which signals may travel several times farther than at other frequencies. The finding may point to strategies for enhancing rescue communications in subways and mines. Tue, 20 May 2008 17:00:00 EDT http://www.sciencedaily.com/releases/2008/05/080516164822.htm http://www.sciencedaily.com/releases/2008/04/080414145659.htm Apple iPhone and iPod (touch) support a new self-localization feature that uses known locations of wireless access points as well as the device's own ability to detect access points. Now researchers have demonstrated that positions displayed by the devices using this system can be falsified, making the use of this self-localization system unsuitable in a number of security- and safety-critical applications. Wed, 16 Apr 2008 05:00:00 EDT http://www.sciencedaily.com/releases/2008/04/080414145659.htm http://www.sciencedaily.com/releases/2008/03/080312103805.htm With the aid of multiple antenna technology, researchers have succeeded in quadrupling the existing transmission rate of conventional networks from 54 megabytes per second (Mbps) to 216 Mbps. According to the communication theory, only a limited amount of data can be transmitted within a given bandwidth for wireless communication. Mon, 17 Mar 2008 05:00:00 EDT http://www.sciencedaily.com/releases/2008/03/080312103805.htm http://www.sciencedaily.com/releases/2008/03/080311200326.htm From traffic lights to mobile phones, small computers are all around us. Enabling these 'embedded systems' to create wireless communications networks automatically will have profound effects in areas from emergency management to healthcare and traffic control. Networks of mobile sensors and other small electronic devices have huge potential. Applications include emergency management, security, helping vulnerable people to live independently, traffic control, warehouse management, and environmental monitoring. Fri, 14 Mar 2008 20:00:00 EDT http://www.sciencedaily.com/releases/2008/03/080311200326.htm