Amplitude phase keying

… Binary ASK, where v ( t ) takes values ​​of ±1, is a signal equivalent to two-phase PSK (short for phase shift keying). Other ASKs are not used often, but APK (short for amplitude phase keying), which combines ASK and PSK, is widely used. A part of APK is also called QAM (short for quadrature amplitude modulation). …

*Some of the terminology that mentions "amplitude phase keying" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…v(t)が±1の値をとる2値ASKは，2相PSK(phase shift keyingの略)と等しい信号である。これ以外のASKはあまり用いられないが，ASKとPSKを組み合わせたAPK(amplitude phase keyingの略)は広く用いられている。APKの一部をQAM(quadrature amplitude modulationの略)ともいう。…

※「amplitude phase keying」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報