Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Software-defined radio simplifies mobile phones

20.04.2004


Mobile phones are getting more and more complicated. One reason is that a new radio is needed for each standard-GSM, 3G, and WLAN. A simpler solution, a radio that can be programmed to cover all standards, is now being developed at the Stringent Research Center at Linköping University in Sweden.



“We have come up with three concepts that, together, can reach the goal, the software-defined radio,” says the head of the Center, Professor Christer Svensson.

The three parts are:

  1. Wideband Tunable Low-Noise Amplifier (LNA) for weak antenna signals.
  2. A new type of Radio Frequency (RF) Sampling Receiver Front-End, devised to reshape the data with high carrier-wave frequency into a considerably lower data rate without losing useful information or mixing with disturbing signals. Unlike the conventional radio, it can receive signals with a wide range of carrier-wave frequencies and with different bandwidths. What’s unique is that the date rate has been slowed down before the analog-digital conversion, which otherwise would be extremely expensive and would use lots of currents.

  3. A baseband processor that can be programmed for different standards. Today this is done by a circuit that is tailored only for a specific standard, like GSM.

The Low-Noise Amplifier and the RF Sampling Receiver Front-End exist already as prototypes in form of functional silicon chips.

Stringent (Strategic Integrated Electronic Systems Research) is Sweden’s largest electronics research center, with more than 50 researchers and graduate students from Divisions of Electronic Devices, Computer Engineering, Electronic Systems, and Embedded Systems. The mission of the Center is to convert complex ideas into silicon, to improve the efficiency of embedded systems, and to reduce developmental times. Basic funding is from the Swedish Foundation for Strategic Research.

The first year of operation has led to many other interesting research results including:

  • New methods for allocating tasks in control computers, leading to enhanced efficiency and security for data processing (such as in cars).
  • More efficient network protocols for network processors.
  • New methods for design of efficient digital filters, which are useful in radio and satellite communication.

Åke Hjelm | alfa
Further information:
http://www.ida.liu.se/~eslab/stringent/

More articles from Communications Media:

nachricht New Technologies for A/V Analysis and Search
13.04.2017 | Fraunhofer-Institut für Digitale Medientechnologie IDMT

nachricht On patrol in social networks
25.01.2017 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO

All articles from Communications Media >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>