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AR# 30171

LogiCORE Additive White Gaussian Noise Generator (AWGN) - Release Notes and Known Issues

Description

This Answer Record contains the Release Notes and Known Issues list for the CORE Generator LogiCORE Additive White Gaussian Noise Generator (AWGN) core.

The following information is listed for each version of the core:

- New Features

- Bug Fixes

- Known Issues

LogiCORE Additive White Gaussian Noise Generator (AWGN) Lounge:

http://www.xilinx.com/products/ipcenter/DO-DI-AWGN.htm

Solution

General LogiCORE Additive White Gaussian Noise Generator (AWGN) Issues

- Is the AWGN Core supported in Virtex-5? See (Xilinx Answer 29305).

- Why is there a timing ignore (TIG) for the top-level "sigma" path in the AWGN ".ucf" file? See (Xilinx Answer 22256).

LogiCORE Additive White Gaussian Noise Generator (AWGN) v1.2

Initial Release September 12, 2005

New Features

- Support for XST Synthesis Added

- Added information to Readme.txt on the hardware test bench

Bug Fixes

- N/A

Known Issues

- N/A

LogiCORE Additive White Gaussian Noise Generator (AWGN) v1.0

Initial Release October 10, 2002

New Features

- Designed for Virtex-II and Virtex-II Pro using structural VHDL

- Probability density function (PDF) deviates less than 0.2 percent from the Gaussian PDF for |x| < 4.8 sigma and is obtained from a closed-form expression

- Based on the Box-Muller algorithm and the central limit theorem

- Period of generated noise sequence is ~ 2190 = 1.571057 samples

- Power spectral density is flat

- SNR input ranges from 0.0 to 15.9 dB in steps of 0.1 dB and provides scaling to obtain desired variance

- Noise is quantized to 16 bits with 5 bits of integer and 11 bits of fraction

- 760-bit internal seed selectable through top-level generics

- Core returns to its initial state upon reset

- Bit-true Simulink model and MATLAB programs included

Bug Fixes

- N/A

Known Issues

- N/A

AR# 30171
Date Created 03/12/2008
Last Updated 12/15/2012
Status Active
Type General Article