Quadrature modulation 直角相位调制
multi-level quadrature amplitude modulation 多电平正交调幅
quadrature balanced modulation 正交平衡调制
balanced quadrature modulation 平衡正交调制
QAM Quadrature Amplitude Modulation 正交调幅 ; 正交调幅调制
phase quadrature modulation 相位正交调制
Offset Quadrature Amplitude Modulation 偏置正交幅度调制 ; 交错正交幅度调制
M-ary quadrature amplitude modulation 正交幅度调制
Based on the idea of the Schmidt orthogonalization and the orthogonal chaotic carriers being generated, a chaos-based quadrature modulation communication system is proposed and realized.
基于施密特正交化的原理，在产生正交混沌载波的基础上，提出并实现了一种基于混沌的正交调制通信系统。
Firstly the basic transmitter, including convolutional encoding, interleaving, scrambling, Walsh modulation, quadrature spreading and baseband filtering was studied.
首先研究基本的发射机，包括卷积编码、交织、扰码、沃尔什调制、正交扩频以及基带滤波。
It is clearly clarified the conceptions of quadrature modulation, quadrature exciting, quadrature receiving, and quadrature demodulation in the MRI system.
阐明了MRI系统中所使用的正交调制、正交解调、正交激发和正交接收的概念。
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