(1) Offset Quadrature Amplitude Shift Keying?

(2) Binary system amplitude shift keying (2FSK).

(3) This is called "amplitude shift keying".

(4) A amplitude shift keying(ASK) demodulation method based on adaptive filtering was discussed in this paper.

(5) Quadrature Amplitude Shift Keying?

(6) Thirdly, we quantify the power penalty caused by the PMD in optical subcarrier multiplexing (OSCM) system with amplitude shift keying (ASK) and binary phase shift keying (BPSK).

(7) The phase modulation has some more advantages against CW, which uses ASK ( amplitude shift keying ).