single sideband bandpass signal & complex FIR representa

Dear friends,

As a part of my thesis which is to design a bandpass sampling receiver I have two basic questions to ask:
1- How to express and show a single sideband bandpass signal in MATLAB.
2- I have the transfer function of a complex FIR filter and the coefficients but I don't know how to express it in MATLAB and see its response to my single sideband signal.

Thanks,
Mahyar