On the Concept of a Multi-Mode Agile Receive Digital-Front-End for Cellular Terminals

Konferenz: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
11.09.2005 - 14.09.2005 in Berlin, Germany

Tagungsband: PIMRC 2005

Seiten: 5Sprache: EnglischTyp: PDF

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Hueber, Gernot; Hagelauer, Richard (Institute for Integrated Circuits, Johannes Kepler University, Altenbergerstr. 69, 4040 Linz, Austria)
Maurer, Linus (Danube Integrated Circuits Engineering (DICE), Linz, Austria)
Strasser, Georg (Linz Center of Competence in Mechatronics (LCM), Linz, Austria)
Stuhlberger, Rainer (Institute for Communications and Information Engineering (ICIE), Linz, Austria)

This paper describes the concept of a highly reconfigurable digital-front-end (DFE) enabling multi-mode capable RF receivers for cellular applications, based on the well known direct conversion receiver (DCR) architecture. Its main functionality includes sample-rate-conversion, channel selection filtering, dynamic range control, imbalance correction and matched filtering. The described partitioning shifts some of the functionality, normally located in the analog-front-end (channel filtering, gain control) or the baseband IC (matched filter) to the digital-frontend. The DFE concept allows shifting all analog and mixed-signal blocks to the RF IC, whereas the baseband processing is left purely digital and thus can make use of main stream technology such as CMOS. The technology shift towards RF-CMOS further favors this strongly digital receiver architecture.