Digital Filter

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  • Topic: Digital signal processing, Convolution, Bit
  • Pages : 47 (4914 words )
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  • Published : January 16, 2013
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Technical Reference
Practical Considerations in Fixed-Point FIR Filter Implementations

s
Author

Date

Time

Rev

No.

Randy Yates

27–Mar–2007

16:25

PA3

n/a

1 (13)

Reference

fir.tex

Practical Considerations in Fixed-Point FIR Filter Implementations Randy Yates
27–Mar–2007

s
signal processi ng systems

http://www.digitalsignallabs.com

A
Typeset using LTEX 2ε

Digital Signal Labs

Public Information

Technical Reference
Practical Considerations in Fixed-Point FIR Filter Implementations

s
Author

Date

Time

Rev

No.

Randy Yates

27–Mar–2007

16:25

PA3

n/a

2 (13)

Reference

fir.tex

Contents
1 Introduction
1.1 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3
3
3

2 Scaling FIR Coefficients

4

3 Choosing the FIR Filter Output Word
4 Quantization Noise in FIR Filters
4.1 Truncation . . . . . . . . . . .
4.2 Rounding . . . . . . . . . . .
4.3 Dithering . . . . . . . . . . .
4.4 Noise-shaping . . . . . . . . .

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