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A Viterbi decoder with low-power trace-back memory structure for wireless pervasive communications

By Pasin Israsena and Izzet Kale


This paper presents a new trace-back memory structure for Viterbi decoders that reduces power consumption by 63% compared to the conventional RAM based design. Instead of the intensive read and write operations as required in RAM based designs, the new memory is based on an array of registers connected with trace-back signals that decode the output bits on the fly. The structure is used together with appropriate clock and power-aware control signals. Based on a 0.35 /spl mu/m CMOS implementation the trace-back back memory consumes energy of 182 pJ

Topics: UOW3
Publisher: IEEE
OAI identifier: oai:westminsterresearch.wmin.ac.uk:3341
Provided by: WestminsterResearch

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  3. (2003). Design of a 20-mb/s 256-state Viterbi decoder,”
  4. (2002). Design of a high-throughput lowpower IS95 Viterbi decoder”,
  5. (2003). Design of a low-power Viterbi decoder for wireless communications,”
  6. (1996). Design of a Viterbi decoder with low power using minimum transition traceback scheme,”
  7. (1967). Error bounds for convolutional codes and an asymptotically optimum decoding algorithm,”
  8. (1993). Generalized trace-back techniques for survivor memory management in the Viterbi algorithm,”
  9. (2003). Low Power and High Speed Viterbi Decoder Chip for WLAN Applications”,
  10. (1998). Low power architecture of the soft-output Viterbi algorithm,”
  11. (1998). Low-power Viterbi decoder for CDMA mobile terminals,”
  12. (1998). Low-power Viterbi decoder for CDMA mobile terminals”, IEEE-Journal of Solid-State Circuits.
  13. (1994). Very low power consumption Viterbi decoder LSIC employing the SST (scarce state transition) scheme for multimedia mobile communications,”

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