Finite Word Length Effects in Digital Filters - Introduction

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Finite Word Length Effects in Digital Filters:

  • Digital Signal Processing algorithms are mainly used in Digital systems like Digital computers, Digital Filters and all modern digital hardware.
  • In digital systems, the numbers and coefficients are stored in finite length registers
  • But in DSP algorithms, the numbers and coefficients are very large. In order to store the large number to finite length register, the numbers are quantized by truncation (or) rounding off method
Effects / Errors due to quantization:
  1. Input Quantization Error
  2. Product Quantization Error
  3. Coefficient Quantization Error
  4. Round-off noise
  5. Limit cycle oscillations

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