quadrature phase

In order to eliminate the subdividing error caused by fring signals which is not in phase quadrature, a new method that can directly subdivide fringe signals for random phase relationship is presented.

为消除传统细分方法中由于两路条纹信号不正交引入的细分误差，提出了一种可对任意相位差条纹信号直接细分的新方法。

All digital receiver of quadrature phase shift keying with large frequency shift correction

四相相移键控调制的抗大频偏的全数字接收机

IJF-OQPSK is actually to modulate the IJF codes by the Offset Quadrature Phase Shift Keying.

IJF&OQPSK实际上是对IJF信号再进行正交四相相移键控的调制技术。

The receiver takes use of three methods to enhance the image reject performance. Compared with traditional In phase and Quadrature ( I/ Q) structure, double quadrature weaver architecture performs higher image reject.

接收机前端应用了三种方法来提高镜像抑制度：低中频双正交weaver结构比一般的同相/正交（I/Q）两路下变频结构具有更高的镜像抑制能力；

The algorithm can remove phase ambiguity of digital communication signals which have independent in-phase and quadrature components.

该算法可以消除同相和正交分量相互独立的数字通信复信号的相位模糊性。

Methods for the realization of the radio front end, the quadrature converter and baseband processing are given, with the accuracy of quadrature phase 90 ° and equality of the inphase and quadrature signal gains being key factors.

给出了零中频接收机射频前端、正交变频和基带处理的实现方法，其中正交90°移相的准确性和正交两路输出放大器增益的一致性是关键。

The principle and fabrication of the phase quadrature laser interferometer for measuring microscopic asPerity are described.

叙述了测量微观不平度的90°相移激光干涉仪的原理和构成。

A QPSK blind sequence detection algorithm based on the ε-equalization principle is proposed. The algorithm can formulate the quadrature phase shift keying blind sequence detection into a quadratic programming with integer constraints.

给出了基于ε-均衡准则的QPSK序列盲检测算法，该算法将QPSK序列盲检测问题转化为带整数约束的二次规划问题。

In this paper, error of quadrature vector detector used in direct converting receiver is analyzed and performance deterioration caused by gain error, phase error, local oscillation leak or DC offset on receiver's inphase and quadrature channels is discussed.

本文对直接变频接收机中正交矢量检测法进行了误差分析，讨论了由于接收机同相与正交两支路的增益差异、相位误差、本振泄漏及直流偏置导致其性能恶化的结果。

Double Baseband Processing Offset Quadrature Phase Shift Keying Modulation Technique

两次基带处理&偏移正交相移键控调制技术