FIR filters can be designed using different types of window functions. In this experiment, we have designed the filter using Hanning filter.
A window function is used to truncate the infinite samples of h_d(n). Phase plot observed was linear and so the output of filter was a delayed version of input.
https://drive.google.com/drive/folders/0B3FKfBjwMZ_EQ2drdmF6eEx4MXM