Open AccessDesign of Dual‐Mode Digital Down Converter for WCDMA and cdma2000
Author(s) -
Kim Miyeon,
Lee Seungjun
Publication year - 2004
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.04.0804.0013
Subject(s) - cdma2000 , electronic engineering , software defined radio , digital down converter , block (permutation group theory) , computer science , filter (signal processing) , w cdma , dual mode , rf front end , code division multiple access , engineering , computer hardware , electrical engineering , digital signal processing , radio frequency , digital signal , mathematics , geometry
We propose an efficient digital IF down converter architecture for dual‐mode WCDMA/cdma2000 based on the concept of software defined radio. Multi‐rate digital filters and fractional frequency conversion techniques are adopted to implement the front end of a dual‐mode receiver for WCDMA and cdma2000. A sub‐sampled digital IF stage was proposed to support both WCDMA and cdma2000 while lowering the sampling frequency. Use of a CIC filter and ISOP filter combined with proper arrangement of multi‐rate filters and common filter blocks resulted in optimized hardware implementation of the front end block in 292k logic gates.