How SSB signal can be generated by filter method?
The filter method is the traditional SSB reception method in analog superhet receivers. Typically a first mixer translates the signal to an intermediate frequency (IF) first. At the IF a sharp band-pass filter with fixed frequency response simply selects only one of the two sidebands and suppresses the other one.
What is phase shift method?
Nowadays, the phase-shifting method (PSM) [1, 2], also known as the phase-stepping method, is one of the most powerful tools in optical metrology and is suited for measuring the phase information of the fringe pattern or interference image.