基于matlab的QAM调制与解调。正交振幅调制（QAM）是一种幅度和相位联合键控（APK）的调制方式。它可以提高系统可靠性，且能获得较高的信息频带利用率，是目前应用较为广泛的一种数字调制方式。 -Matlab based on the QAM modulation and demodulation. Quadrature amplitude modulation (QAM) is a joint amplitude and phase keying (APK) modulation met

Quadrature amplitude modulation (QAM) is both an analog and a digital modulation scheme. It conveys two analog message signals, or two digital bit streams, by changing (modulating) the amplitudes of two carrier waves, using the amplitude-shift keying

tA scheme of format conversion optical 16-ary quadrature amplitude modulation (16QAM) toquadrature phase shift keying (QPSK) signal based on cascaded four-wave mixing (FWM) in semiconduc-tor optical amplifiers (SOAs) is proposed. Theoretical analysis

QAM是Quadrature Amplitude Modulation的缩写，中文译名为“正交振幅调制”，其幅度和相位同时变化，属于非恒包络二维调制。QAM是正交载波调制技术与多电平振幅键控的结合 。-QAM is Quadrature Amplitude Modulation Abbreviation, Chinese translation for " quadrature amplitude modulation" , the amplitude and phase cha

a coherent optical receiver for demodulating optical quadrature phase-shift keying (QPSK) signals. ... Third, this scheme is applicable to multilevel modulation formats such as M-array PSK and quadrature amplitude modulation (QAM). First contribution