Borrar filtros
Borrar filtros

CIC fixed point representation

3 visualizaciones (últimos 30 días)
Amr Elhosiny
Amr Elhosiny el 16 de Mzo. de 2015
Respondida: Ganesh Gaonkar el 16 de Mzo. de 2015
Guys,
I'm somehow new to simulink. I'm trying to design a programable CIC From reading, you should design @ the highest decimation ratio then you choose output according to programable decimation ratio.
My problem is that I do not understand the fixed point notation. For example my CIC output WL=14/FL=5 and I need to divider by :
  • 2^3 for decimation ratio = 4
  • 2^5 for decimation ratio = 8
  • 2^7 for decimation ratio = 16
I need the output width to be 11 bits as I'm going to implement this as VHDL later. I knew that I should add a convert block after CIC to have my new data widths. Now I can not calculate the WL/FL for the three cases above.

Iniciar sesión para responder a esta pregunta.

Respuestas (1)

Ganesh Gaonkar
Ganesh Gaonkar el 16 de Mzo. de 2015
Did you check if this block can help ? : cicdecimation
To know more about it's usage, you can try to go to the demo 'dspddc' which is about 'GSM Digital Down Converter'

Categorías

Más información sobre FPGA, ASIC, and SoC Development en Help Center y File Exchange.

Etiquetas

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by