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 Tile Based DASH Streaming for Virtual Reality with HEVC from Fraunhofer HHI
03.01.2017 | Fraunhofer-Institut für Nachrichtentechnik Heinrich-Hertz-Institut

nachricht Product placement: Only brands placed very prominently benefit from 3D technology
07.07.2016 | Alpen-Adria-Universität Klagenfurt

All articles from Communications Media >>>

The most recent press releases about innovation >>>

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

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Explaining how 2-D materials break at the atomic level

18.01.2017 | Materials Sciences

Data analysis optimizes cyber-physical systems in telecommunications and building automation

18.01.2017 | Information Technology

Reducing household waste with less energy

18.01.2017 | Ecology, The Environment and Conservation

VideoLinks
B2B-VideoLinks
More VideoLinks >>>