Welcome Guest Log In | Register

Practical Considerations in Fixed-Point FIR Filter Implementations

Authored on: Apr 15, 2008 by Randy Yates

Technical Paper

0
More InfoLess Info

In a practical system, one is limited to a finite number of bits in the words used for the filter input, coefficients and filter output. Most current digital signal processors provide arithmetic logic units and memory architectures to support 16 bit, 24 bit, or 32 bit wordlengths, however, one may implement arbitrarily long lengths by customizing the multiplications and additions in software and utilizing more processor cycles and memory. Similar choices can be made in digital hardware implementations. The final choices are governed by many aspects of the design, such as required speed, power consumption, SNR, cost, and so on.

This paper discusses practical considerations in Fixed Point FIR Filter implementations. It discusses scaling FIR coefficients, choosing the FIR filter output word, and quantization noise in FIR filters.

View
 

Please Login

You will be redirected to the login page

×

Please Login

You will be redirected to the login page

×

Please Login

You will be redirected to the login page