High-performance FIR filter design based on sharing multiplication

  • Authors:
  • Jongsun Park;Khurram Muhammad;Kaushik Roy

  • Affiliations:
  • School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN;Texas Instruments Inc., Dallas, TX;School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN

  • Venue:
  • IEEE Transactions on Very Large Scale Integration (VLSI) Systems
  • Year:
  • 2003

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Abstract

Finite impulse response (FIR) filtering can be expressed as multiplications of vectors by scalars. We present high-speed designs for FIR filters based on a computation sharing multiplier which specifically targets computation re-use in vector-scalar products. The performance of the proposed implementation is compared with implementations based on carry-save and Wallace tree multipliers in 0.35-µm technology. We show that sharing multiplier scheme improves speed by approximately 52 and 33% with respect to the FIR filter implementations based on the carry-save multiplier and Wallace tree multiplier, respectively. In addition, sharing multiplier scheme has a relatively small power delay product than other multiplier schemes. Using voltage scaling, power consumption of the FIR filter based on computation sharing multiplier can be reduced to 41% of the FIR filter based on the Wallace tree multiplier for the same frequency of operation.