Boffins Beam 800 mbps Wireless Network From Flashlight!

German researchers have found out how to fill a room with 800 megabits per second of wireless data employing an inexpensive LED setup. Researcher Klaus-Dieter Langer said, ”Using red-blue-green-white light LEDs, we were able to transmit 800Mbit/s in the lab. That is a world record for the [visible light communication] method.”

Langer, operating at Berlin’s Heinrich Hertz Institute, a branch of Fraunhofer Institute for Telecommunications, also accounted an earlier experiment that reached 100Mbit/s using only white-light LEDs. ”We turn the LEDs off and on in very rapid succession and transfer the information as ones and zeros,” he explained. “The modulation of the light is imperceptible to the human eye. On the receiving end is a simple photo diode, and circuitry that changes the diode’s signals into a digital data stream. According to Langer, advantages of this method admit the simplicity of changing the LEDs into signal-sending devices, and the riddance of cabling as a signal-transferring medium.

In the 100 Mbit/s experiment, the signalling LEDs were situated on the ceiling, and the transmission was error-free in an area of 10 square meters, received by a group of four photo diode–fitted laptops. HHI researcher, Anagnostis Paraskevopoulos said, ”We transferred four videos in HD quality to four different laptops at the same time.” Applying visible light as a signaling medium instead of radio waves has clear advantages in areas such as hospitals and aircraft where radio transmission is not possible and where cabling would be discouragingly expensive.

The most evident disadvantage of visible light communication (VLC) is that the signal can be easily barred by any solid object, for example a hand moving between the LEDs and the photo diode. The unfitness for light to penetrate walls also limits VLC to special-case scenarios. As limited as VLC may seem, when The Reg spoke in June with Aicha Evans, wireless engineering manager at Intel, she stated that “a lot of people are talking about visible light.”

Though Evans accepted that “it’s still science fiction,” VLC may very well show its value in the last few meters of a data stream. If at this early phase of its evolution it’s already being demonstrated at 800Mbit/s speeds, VLC may very well prove to be a functional high-speed, within-four-walls broacast WLAN in future executions.

Transfer Data With The Help Of LEDs!

Light emitting diodes, simply called as LEDs, are already been used for lighting purpose to reduce power consumption. Now, scientists have put these little Lucifers to another use! Researchers fromFraunhofer Institute for Telecommunications, Heinrich Hertz Institute (HHI) in Berlin, Germanyhave finally demonstrated that the LEDs can also be used to transfer data. This technology is not your regular fiber optics in which cables are laid down to transfer data in form of light beams over a distance. The data transfer is wireless and this innovative technology is called as Visible Light Communication (VLC). What makes this technology promising is that there is no requirement to install a different setup in your homes to avail the benefits of VLC enabled data transfer. The LEDs used for lighting purpose multi task by acting as transmitters for data transfer. Scientists plan to demonstrate the transfer of video by light at the International Telecommunications Fair IFA (Internationale Funkausstellung IFA) in Berlin from September 2-7, 2011 in Hall 11.1, Booth 8.

Not just Lucifer!

The technology was developed by HHI in collaboration with the industrial giants: Siemens andFrance Telecom Orange Labs. The results of the research and development in VLC are amazing. People at HHI demonstrated actual data transfer with the help of overhead LEDs used for lighting to transfer data at a speed of  100 megabits per second (Mbit/s). The data was transfer was completed without any loss and the LEDs used for data transfer could light about 90 square feet of area. The LEDs were used as transmitters and the receiver’s maximum range is the radius that the LEDs could lighten up. As of now, scientists are working to increase the range of receivers. With these conditions, scientists were successful in transferring four videos simultaneously to four different receiving end gadgets (laptops in this case) in HD quality. Dr. Anagnostis Paraskevopoulos from the HHI expressed happiness over their current success and hopes for better refinements in various aspects of the technology such as range of the receivers, transfer rate, etc.

VLC is all about using the LEDs both for lighting and for transfer of data. In the project completed by the team at HHI, led by project manager Klaus-Dieter Langer, white light LEDs were used. The LEDS acted as the transmitter and their turning on and off was controlled with the help of a modulator. The data is transferred in the form of ones and zeroes when the LEDs turn on and off rapidly. The LEDs are modulated in such a way that their frequent and rapid operation is imperceptible to the human eye. The receiver used by the team at HHI was a simple photo diode. This diode acted as receiver for light transmitted by the LEDs. A separate electronic circuit in the laptop acted as decoder for the information relayed by the overhead LEDs. The information is decoded in the form of pulses and then the computer can receive the data successfully.

The VLC technology for video transfer developed is a small part of the OMEGA project of the EU. The project aims for setting international standards for ultra broadband home area network. Since its inception in 2008, the project has made the implementation of video transfer in home with the help of VLC a closer reality. The tuning in of LEDs with the existing Wireless Local Area Network connected via optical fibers is successfully done with the help of visible light communication. The data transfer does not need any cable and wiring. It can be achieved simply by sitting below the overhead LEDs that perform the dual function of lighting and data transfer with equal ease.

The biggest advantage of Visible Light Communication is the requirement of very less number of components to modify normal LEDs for data transfer. However, on the flip side, the data transfer needs a visual line of sight for communication between the transmitter (LED) and the receiver (photo diode). Scientists are working to remove this major drawback in otherwise superb technology. They know the limitations very well and do not intend to replace the most popular modes of data transfer such as regular WLAN, Power LAN or Universal Mobile Telecommunications System (UMTS). The VLC can be used efficiently in places where radio transmission cannot be executed. This mode of data transfer can also be used where laying of cables is undesirable or in some cases, almost impossible. The VLC can be used in a flexible one-way mode, such as optical WLAN to send data from mobile to laptop and VLC to send data from laptop to mobile.

VLC is going to find its applications in places where radio communication is not admired: Hospitals, Production facilities, High Sensitivity Communication panel rooms, Airplanes etc. Presently, increasing the data transfer speed is high on agenda for the scientists at HHI. They are on the right track and this is evident from their results with the help of red-blue-green-white light LEDs. Data transfer at speed of 800 Mbit/s was achieved in labs. Until then, keep your eyes open for the demonstration of video transfer by light at the International Telecommunications Fair in September.

Adobe Collaborates With 3 New Partners For Developing India Specific Mobile Apps

Adobe Systems recently announced that it will be entering the Indian mobile apps market. After seeing the huge potential and the ever growing market share of the Indian subcontinent’s mobile users, the famous software developer has decided to shift its attention to India. Adobe also has inked deals with Standard Chartered Bank, redBus and Perfios so that it can provide high end interactive mobile apps to the Indian mobile users. Adobe systems, which have their Indian headquarters in Bangalore, declared that they will be operating closely with the creative and developer ecosystem in India to facilitate speedy development of rich digital experiences for multiple devices, screens and OSs for the Indian market.

Adobe will soon develop India centric apps

India is a fast developing nation with about 850 million plus mobile users. Many of these users are slowly shifting to the new generation of smartphones with loads of cool apps. Adobe has recognized that this is the best time to enter the fray to usher in a new era of digital experience. Adobe, which is a market leader in providing efficient and diverse tools such as Adobe Flash and Flex has a reputation of creating innovative web technologies.

In a recently concluded annual Adobe Flash Platform Summit 2011, the company gave a glimpse of the work it’s planning to accomplish with the help of its partners, the main objective being to create interactive mobile apps as well as rich Internet experiences. For example, Adobe is working with redBus to develop a mobile app that can be used to book bus tickets for numerous routes across India. The app provides the user with a highly interactive GUI and an intuitive interface that helps you to book tickets on the go, compare fares, check routes, assign seats, etc.

Adobe has diversified to the financial sector also and will be providing solutions to Standard Chartered Bank. Standard Chartered recently launched its global mobile banking application called ‘Breeze’ in India. Standard Chartered used Adobe tools like Flash Builder 4.5 and Flex 4.5 to create a fully transactional banking app with an interactive, engaging customer experience for a large number of tablets and smartphone devices. Adobe will be working in association with Perfios, financial software developer. Perfios partnered the Technology Evangelist team at Adobe India to craft a multi-platform mobile app using Flex Mobile. Together, they will be developing a tool or a mobile app that will allow the user to keep a record of the personal finances and manage them efficiently.

GE Launches Hammerhead DC-DC Power Conversion Modules

Electronics Giant General Electric introduced its lineage power hammerhead series DC-DC circuit board power conversion modules. The hammerhead series which is designed for an input voltage range of 18-75 VDC promises an overall efficiency improvement as compared to other products in the market and reduces the power loss by over 50%. The power conversion module is engineered to sustain extreme temperature range of –40°C to +85°C. The integration of these circuits in electronics guarantees the original equipment manufacturers (OEM) design engineers to achieve complete electrical isolation and durability of the device. This will help manufacturers roll out more products across wide range of industrial applications including medical, military and other extreme condition applications.

Image credit:Solar Novus Today

The Hammerhead series is based on the Distributed Power Open standards Alliance abbreviated (DOSA), which makes them cheaper and energy efficient alternatives as a power conversion module.  According to Niklas Fallgren, the vice president and General Manager of OEM embedded power at GE Energy,

The flexible Hammerhead DC-DC converter modules are technology leaders in efficiency and performance. These board mounted power modules are designed for use in a wide variety of industrial applications to give power design engineers a reliable solution that lowers cost and reduces risk when compared to other power solutions.

The modules are designed in such a way so as to minimize the circuit board real estate usage. With open frame module construction the Hammerhead series can achieve a full load efficiency of 92% and above for an input voltage of 24VDC and more than 90% for 48VDC. The other features available with GE’s power conversion module are remote on/off; remote sense; output voltage adjustment; and over-voltage, over-current and over-temperature protection. Moreover the device reaches a higher output current in extreme temperature conditions.

The Hammerhead series power conversion modules are available to customers in eight brick DOSA standard footprints. The modules will find wide applications in robotics navigation systems automotive electronics and almost all types of electronic circuitry. The modules are available in three models rated for 12V at 6 Amps, 5V at 15 Amps or 3.3V at 20 Amps. As for now the Hammerhead EHHD006, EHHD015, EHHD020 isolated DC-DC converter modules are available.

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