This core decodes incoming Manchester encoded data. The core is easily modified for your particular project, in that there are just a few constants that you must change.
This project is in an alpha stage and is currently too susceptible to other radio noise. In our development environment, there is currently a 25-50% error rate, which comes from the algorithm misidentifying signal for noise and noise for signal.
Obtain the most current code with:
svn co http://opencores.org/ocsvn/manchesterwireless/manchesterwireless/tagsrelease-1.0 manchesterwireless --username your_username
Once the code is checked out, you will find the manual in documentation/design.txt.