Quadrature amplitude modulation

…Other ASKs are not used much, but APK (short for amplitude phase keying), which is a combination of ASK and PSK, is widely used. A part of APK is also called QAM (short for quadrature amplitude modulation). Amplitude modulation when the carrier wave is a pulse train is called pulse amplitude modulation (PAM). …

*Some of the terminology that refers to "quadrature amplitude modulation" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…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。搬送波がパルス列の場合の振幅変調は，パルス振幅変調pulse amplitude modulation(PAM)という。…

※「quadrature amplitude modulation」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