Quadrature Amplitude Modulation (QAM) A method for encoding digital data in an analog signal in which each combination of phase and amplitude represents one of sixteen four bit patterns. This is required for fax transmission at 9600 bits per second. ...
Conventional QAM modulator comprises two mixers, wherein the data signal is multiplied in each case one of two mutually orthogonal carriers; modulation products thus produced by additively combined into a QAM signal. 在高级数调制方法(64-QAM和256-QAM)中,关于载波相位,基带通道的电平差以及线性度,对...
Quadrature Amplitude Modulation 正交振幅调变(=QAM)一种调制数字信号的编码方式,它兼用振幅编码和相位编码。该方法既可以用于下行,也可以用于上行。该方法能充分利用带宽,并且抗噪声能力强。 quadrature amplitude modulation 正交调幅 quadrature modulation 正交调制,直角相位调制 amplitude modulation n. 调幅 balanced...
QAM Modulator and Demodulator combine two amplitude modulation signals into a single data transfer channel: 1. Technique of modifying any one characteristic ...
网络释义 1. 正交调幅 航海及海运专业英语词汇(Q) ... quadratic 二次的quadrature amplitude modulation正交调幅quadrature axis 象限轴 ... www.diyifanwen.com|基于162个网页 2. 正交幅度调制 计算机网络网站 ... (Payload Type) 负荷类型 (Quadrature Amplitude Modulation)正交幅度调制(Quality of Service) 服务...
Quadrature-amplitude modulation (QAM) is a form of quadrature modulation in which both the carriers are amplitude-modulated. The following table shows the supported M-ary number for QAM. Modulation Type M-ary QAM 4, 8, 16, 32, 64, 128, 256, 512, 1,024, 2
D.3 Non-uniqueness of QAM representation For a give real-valued signal x(t), the representation in terms of in-phase and in-quadrature components, also referred to as quadrature amplitude modulation (QAM) representation, is not unique. In fact, let be (D.38)f0′≜f0+Δf we have (D...
必应词典为您提供Quadrature-Phase-and-Amplitude-Modulation的释义,网络释义: 正交调相调幅;正交相位和幅度调制;
5) quadrature amplitude modulation 正交调幅,正交幅度调制6) QAM 正交调幅补充资料:调制解调器 在数据通信中发送数据时把电码变换为适合于线路传输的信号,在接收时把来自线路的信号还原为电码的设备,简称调解器(modem是modulator-demodulator的缩写)。调制解调器在中国惯称为数传机。数传机还可以包括差错控制器(见...
Quadrature amplitude modulation is a method of encoding digital data on an analog carrier signal, such as a radio frequency.