I have an analog waveform defined in the time domain that I need to
detect and measure. I would like to design a matched filter to
optimize the signal to noise ratio of the detected waveform.

Although the waveform is a pulse, it is rounded on the top and can not
really be considered rectangular. The documentation I have been
finding seems to just talk about rectangular wave shapes for digital
bit detection. I am doing something different; I want to actually
measure the pulse area or at least have something proportional to it.

Can someone steer me in the direction of some software or technique
for designing these types of filters?

Thanks. Al