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The digital front-end of software radio terminals

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3 Author(s)
Hentschel, T. ; Tech. Univ. Dresden, Germany ; Henker, M. ; Fettweis, G.

When expanding digital signal processing of mobile communications terminals toward the antenna while making the terminal more wideband in order to be able to cope with different mobile communications standards in a software radio based terminal, the designer is faced with strong requirements such as bandwidth and dynamic range. Many publications claim that only reconfigurable hardware such as FPGAs can simultaneously cope with such diversity and requirements. Starting with considerations of the receiver architecture, we describe key functionalities of the digital front-end and highlight how the signal characteristics of mobile communications signals and commonalities among different signal processing operations can be exploited to great advantage, eventually enabling implementations on an ASIC that, although not reconfigurable, would empower the software radio concept

Published in:

Personal Communications, IEEE  (Volume:6 ,  Issue: 4 )