Pseudo Random noise Generator in VHDL

[ei99dami]

pseudo random noise generator

Where can I find good information how to create a pseudo random noise generator in VHDL.

/Robin

 

[aji_vlsi]

random vhdl

Where can I find good information how to create a pseudo random noise generator in VHDL.

/Robin

Robin,
Use IEEE.MATH_REAL package and UNIFORM function. See:

https://tams-www.informatik.uni-hamburg.de/vhdl/packages/P1076.2/mathpack.vhd

I believe recent simulators support it as built-in now.

HTH
Ajeetha, CVC
www.noveldv.com

 

[Elephantus]

random generator vhdl

If you require an implementable noise generator to test in actual hw, you can generate pseudorandom sequences by using linear feedback shift registers (LFSRs), so check that out.

 

[baonguyenpro]

noise generator vhdl

Search on Xilinx, Altera - Keyword: LFSR (Linear Feedback Shift Register)

 

[ahmad_abdulghany]

vhdl uniform

In the book: "Digital Integrated Circuits, A Design Perspective",
by Jan M. Rabaey

Regards,
Ahmad,

 

[tiger_shark]

vhdl noise generator

Hi there,

What distribution would you like your noise to have? are you using it as a channel noise emulator to simulate your communication list as additive Gaussian noise? In that case, simple LFSR would not work for you.

In order to generate Gaussian pn noise (white), you can use BOX-MULLER approach. It generates a pseudo-random Gaussian distributed noise from two uniformly distributed random sequence (which you can get from 2 LFSRs).

Xilinx has an IP for it if you are interested and there are some implementation reports on IEEE.

TS.

 

[anmolvlsi13]

uniform function vhdl

Go to book for
Douglas J.Smith(HDL CHIP DESIGN)