The WAPLAB framework facilitates experimental evaluation of PHYsical (PHY) layer algorithms. However, some novel algorithms may require features not provided in the WARPLab framework. Users are encouraged to modify the WARPLab XPS Reference Design and WARPLab Reference M-Code if this is required in order to meet experiment requirements. For example, if part of the signal processing cannot be done offline in MATLAB but must to be done in real-time, then this signal processing can be implemented in FPGA logic by modifying the WARPLab XPS Reference Design. Depending on the experiment, the users may also have to modify the WARPLab Reference M-Code.