ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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A Two-Stage Radix-4 Viterbi Decoder for Multiband OFDM UWB Systems

  • Choi, Sung-Woo (IT Convergence Technology Research Laboratory, ETRI) ;
  • Kang, Kyu-Min (IT Convergence Technology Research Laboratory, ETRI) ;
  • Choi, Sang-Sung (IT Convergence Technology Research Laboratory, ETRI)
  • Received : 2008.07.01
  • Accepted : 2008.08.22
  • Published : 2008.12.31
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Abstract

This letter presents a power efficient 64-state Viterbi decoder (VD) employing a two-stage radix-4 add-compare-select architecture. A class of VD architectures is implemented, and their hardware complexity, maximum operating speed, and power consumption are compared. Implementation results show that the proposed VD architecture is suitable for multiband orthogonal frequency-division multiplexing (MB-OFDM) ultra-wideband (UWB) systems, which can support the data rate of 480 Mbps even when implemented using 0.18-${\mu}m$ CMOS technology.

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