Quadrature phase method is one of the important methods in directional blood flow information detection using Doppler ultrasound techniques.
正交相位法是超声多普勒技术中提取双向性血流信息的一种重要方法。
The paper analyzes the interference rejection of Quadrature amplitude modulation signals in the presence of carrier phase jitter, sinusoidal interference and white Gaussian noise.
文章分析了存在载波相位起伏、正弦干扰、高斯白噪声时正交调幅数字系统的抗扰性。
Finally, some ways of MTI processing are compared in amplitude and phase unbalances of quadrature channels.
最后比较了几种MTI处理方法对正交通道幅相不平衡度的要求。
The system distortion is inevitable in wide-band analog quadrature receiver because of the existing of amplitude and phase errors, the performance of receiver become worse.
由模拟器件构成的宽带正交解调接收机会由于正交通道的幅相不一致性造成整个系统的失真，进而影响整个接收系统的性能。
The novel feature distinguishes relative distribution between in-phase and quadrature components and lightens the great influence caused by noise and other random factor in clustering algorithm.
将截获信号的直观几何特征（星座图）映射到变换域中，可区别不同调制内部的同相正交分量的相对关系，避免了聚类算法受噪声干扰和其他随机因素影响。
By making use of a pair of oriented filters of quadrature phase and through successive variations of its phase, it gives the vision of an object in motion with the position unchanged.
这项技术的核心思想是利用一对正交的定向滤波核，并通过不断改变其相位得到一系列“运动”的图像，使图像内的物体在实际位置并不发生改变的情况下，产生视觉上的运动效果。
The design and implementation of quadrature waveform generator are described based on the AT89C52, phase-locked loop(PLL) and switched-capacitor filter(SCF).
描述了基于AT89C52单片机、锁相环和开关电容滤波器的正交信号发生器的设计和实现方法。
This paper discussed emphatically various error factors affecting upon quadrature phase discrimnination circuit. Formulae and results are given in the paper.
本文重点讨论影响正交鉴相电路鉴相精度的各种误差因素，给出了计算公式和计算结果。
Moreover, detailed numerical result is presented, particularly for a four-phase, namely quadrature oscillator, which is in accordance with the proposed theoretical analysis.
此外，对于四相位，即正交相位，的情况，也给出了具体的数值结果，与前面的理论分析相一致。
Quadrature phase shift carrier modulation is used to represent the four different phase inputs of digital information, is quaternary phase shift keying.
四相相移调制是利用载波的四种不同相位差来表征输入的数字信息，是四进制移相键控。
Based on measuring method of vector network analyzer, the experimental results of the wideband quadrature demodulator in the imbalance of amplitude and phase are given in this paper.
文中基于矢量网络分析仪测试方法，给出了该宽带正交解调器的幅相不平衡实验结果。
Typically the interface between these devices (the radio and the base band processor) is an analog in-phase and quadrature (I and q) link.
通常这些器件(射频和基带处理器)间的接口是同向和正交(I和Q)链路。
The effect of in-phase and quadrature channel errors on digital quadrature demodulation is analyzed and an optimal digital filter design method is selected.
通过分析同相、正交通道误差对正交解调性能的影响，确定了滤波器最佳设计准则。
At tracking stage, after analysis the characteristics of the In-phase code tracking loop, the paper USES the In-phase and Quadrature code tracking loop to track the code phase.
跟踪阶段，分析了同相码跟踪环的特点，然后根据其不足之处，选择同相正交码环来对码相位进行跟踪。
Quadrature phase shift keying(QPSK) signaling is employed to make efficient use of the available bandwidth.
传输信号采用正交相移键控调制方式，以有效利用有限通信带宽。
This paper presents the design and measurement results of a new phase measurement method, which is based on quadrature phase demodulation and helped with MCS-51 single microcomputer.
介绍一种以正交鉴相为基础。以MCS - 51单片微机为核心的相位检测方案的设计思想和实验结果。
The offset quadrature phase-shift-keyed(OQPSK) is an effective digital constant envelope modulation for band-limited nonlinear channel.
偏移四相相移键控（OQPSK）是一种适用于在限带非线性信道中使用的高效恒包络数字调制技术。
The transmission branch may be the In-Phase (I) branch or the Quadrature (Q) branch.
所述传输支路可以是同相(i)支路或正交(Q)支路。
The errors are classified according to their frequency. The amplitude and phase errors of the LFM signal generators using quadrature modulation technology are mapped into baseband.
提出了一种将正交调制LFM信号产生系统的幅相误差映射到基带后，在数字域利用复系数FIR滤波器进行校正的方案。
The normal zero-IF topology with the single quadrature channels is very sensitive to the phase-error of the phase-shift network of LO.
驻极体传声器目前主要是民用，单指向性驻极体传声器设计与生产的关键在于内部相移网络的控制。
Quadrature Phase and Amplitude Modulation?
正交相位和幅度调制QPAM ？
Offset Quadrature Phase Shift Keying?
偏移量正交相移键控oqps K ？
Offset Quadrature Phase Shift Keying?
偏移量正交相移键控oqps K ？
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