The Digital Front End: Bridge Between RF and Baseband Processing
Gerhard Paul Fettweis, Tim Hentschel · 2002
This chapter contains sections titled: Introduction The Front End of a Digital Transceiver Signal Characteristics Implementation Issues The Digital Front End Functionalities of the Digital Front End The Digital Front End in Mobile Terminals and Base Stations Digital Up- and Down-Conversion Initial Thoughts Theoretical Aspects Implementation Aspects The CORDIC Algorithm Digital Down-Conversion with the CORDIC Algorithm Digital Down-Conversion by Subsampling Channel Filtering Low-Pass Filtering after Digital Down-Conversion Band-Pass Filtering before Digital Down-Conversion Filterbank Channelizers Sample Rate Conversion Resampling after Reconstruction Rational Factor SRC Integer Factor SRC Concepts for SRC Systems for SRC Example Design Parameters Digital Down-Conversion Sample Rate Conversion Channel Filtering Summary Conclusion Acknowledgements References