ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Design of Dual-Mode Digital Down Converter for WCDMA and cdma2000

  • Received : 2004.02.26
  • Published : 2004.12.31
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Abstract

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.

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References

  1. Telecommunications Review v.10 no.1 Software Defined Radio Technology Hwang, Kyung-Ho;Cho, Dong-Ho
  2. Journal of IEEK v.37 no.9 A Block FIR Filtering Architecture for IF Digital Down Converter Chang, Young-Bum
  3. IEICE Trans. Communications v.83 no.6 Implement of SDR-Based Digital IF Channelizer / Dechannelizer for Multiple CDMA Signals Im, S.;Lee, W.;Kim, C.;Shin, Y.;Lee, S.H.;Chung, J.
  4. IEEE v.45 no.2 Application of Filter Sharpenning to Cascaded Integrator-Comb Decimation Filters Kwentus, Alan Y.
  5. IEEE J. Select. Areas Commun. v.17 no.4 On the Use of Interpolated Second-Order Polynomials for Efficient Filter Design in Programmable Downconversion Oh, Hyuk J.;Kim, Sun-Bin;Choi, Gin-Kyu
  6. IEEE Int’l Workshop on Mobile Multimedia Communications v.87932 An Efficient IF Architecture for Dual-Mode GSM/W-CDMA Receiver of a Software Radio Ming Jian,;Weng, Ho-Yung,;Bai, Song-Rong

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