Software Defined Radio - Vision or Reality

Summary form only given. The idea of software defined radio, that is the vision of a generic hardware which can be programmed to manage any radio standards, is introduced. The radio challenge and the resulting very tough requirements on the receiver are discussed. Different options to the software defined radio architecture are described and practical implementations of different elements of the radio architecture are presented. An experimental widely tuneable LNA for the frequency range 0.75-3GHz is presented. A broadband LNA for the frequency range l-7GHz is described together with experimental results. Wideband sampling receivers, aimed for the 2.4 and 5.2GHz frequency bands and 20MHz bandwidth are presented together with some measured results. Another alternative, a direct SigmaDelta-conversion receiver is proposed. Finally, a flexible solution to the digital baseband implementation is described. This solution is a fully programmable DSP, specially adapted to baseband processing. It is shown that this processor saves considerable silicon area and shows no power penalty compared to traditional fixed solutions. In conclusion it is found that software defined radio is quite close to reality today

[1]  Dake Liu,et al.  PROGRAMMABLE BASEBAND PROCESSORS , 2006 .

[2]  K. Folkesson,et al.  A 2.4-GHz RF sampling receiver front-end in 0.18-/spl mu/m CMOS , 2005, IEEE Journal of Solid-State Circuits.

[3]  A. Blad,et al.  An RF Sampling Radio Frontend Based on ΣΔ-Conversion , 2006, 2006 NORCHIP.

[4]  Stefan Andersson,et al.  SOFTWARE DEFINED RADIO – VISIONS, CHALLENGES AND SOLUTIONS , 2006 .

[5]  Stefan Andersson,et al.  SC filter for RF sampling and downconversion with wideband image rejection , 2006, MIXDES 2006.

[6]  Stefan Back Andersson,et al.  A 1.4V 25mW Inductorless Wideband LNA in 0.13/spl mu/m CMOS , 2007, 2007 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.

[7]  C. Svensson,et al.  A 750 MHz to 3 GHz tunable narrowband low-noise amplifier , 2005, 2005 NORCHIP.

[8]  S. Andersson,et al.  Noise Analysis And Noise Estimation Of An RF Sampling Front-end Using An SC Decimation Filter , 2006, Proceedings of the International Conference Mixed Design of Integrated Circuits and System, 2006. MIXDES 2006..