Patent ID: 8426717

Claim:
A discriminator of a modulation technique through which a carrier signal is modulated to a modulated signal, said modulated signal being dividable into plural portions each equal in time period to a modulation period, each of said plural portions having a modulated section subjected to a modulation through said modulation technique and followed by a non-modulated section, said discriminator comprising: an information processor having information processing capability; and a sampler extracting discrete values from a waveform of said modulated signal so as to produce a series of samples expressing said discrete values, and supplying said series of samples to said information processor, a computer program running on said information processor so as to realize a detector supplied with said series of samples from said sampler, and specifying groups of samples expressing the non-modulated sections in said plural portions, a measurer supplied with said groups of samples from said detector, and determining a time period between the group of samples in one of said plural portions and the group of samples in another of said plural portions next to said one of said plural portions and a determiner determining that said modulation technique is same as a predetermined modulation technique when said time period is equal to said modulation period.