对MS K信号，分析了正交解调和差分解调算法。
Analyze the quadrature demodulation and difference demodulation algorithm of MSK signal.
研究基于正交解调的科里奥利质量流量计的信号处理方法。
A quadrature demodulation-based signal processing method of coriolis mass flowmeter is studied.
宽带I/Q正交解调器是高分辨率SAR系统的关键部件之一。
The wideband I/Q demodulator is one of the key devices for high-resolution SAR system.
对脉冲体制的超宽带正交解调接收机幅相误差模型进行了深入分析。
The error model in UWB impulse quadrature demodulation receiver has been analyzed.
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。
It is clearly clarified the conceptions of quadrature modulation, quadrature exciting, quadrature receiving, and quadrature demodulation in the MRI system.
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。
The effect of in-phase and quadrature channel errors on digital quadrature demodulation is analyzed and an optimal digital filter design method is selected.
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。
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.
最后，对某超宽带正交解调接收机的实际测量结果的数字校正，验证了这种方法的有效性。
Finally, the validity of digital correction is verified by simulation and practical measurement of a UWB quadrature demodulation receiver.
给出数字正交解调后输出I、Q两路信号的幅度一致性误差和相位正交性误差的测试方法和测试结果；
Realize digital orthogonal demodulation; the method and results of amplitude consistence and phase orthogonality of the I, Q signal have been given;
结合抽取滤波器的多项滤波结构，在一定条件下，推导出了一种含抽取正交解调接收机最优结构设计方法。
Under certain conditions, combining the polyphase filtering structure of decimation filter, put forward an optimum design method of quadrature demodulation receiver, which owns decimation structure.
文章基于多相滤波的数字正交变换技术，通过数学推导，提出了一种软件无线电中的数字化正交解调新算法。
Based on polyphase filtering technology for digital quadrature transform, this paper presents a new algorithm for digital quadrature demodulation in SR through mathematical derivation.
给出了FM正交解调结构，即在统一的中频数字化硬件平台上，与单边带、调幅等波形一起在基带完成正交解调。
The architecture of FM quadrature demodulation was provided. On the universal IF digitalization hardware platform, FM waveform was demodulated in base-band together with SSB and FM.
利用在接收机输入端加入测试信号，基于统计平均的思想求出所需要的校正系数，然后实现正交解调误差的校正。
Correction coefficients can be received based on statistic average when importing a test signal. Then quadrature demodulation errors are realized.
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 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.
作者提出低频时码信号的正交扫描解调技术，从理论上分析了正交扫描原理和实现方法，并进行了仿真测试；
The orthogonal sampling demodulating technique for low frequency time-code signal is introduced. Based on the theoretical analysis about its principle and implement method, The simulation is tested.
在载波频率已恢复的情况下给出了IQ正交分量的解调算法。
The demodulation algorithm for IQ components is given under condition that the carrier is recovered.
分别实现了V．29信号基本调制解调过程，包括平方根升余弦滚降脉冲成形技术的滤波器实现，以及对信号的正交调制与解调过程。
Realizes V. 29 signal basic modulate and demodulate procedure which includes square root raised cosine rolling-off shaping filter and orthogonal channel signal modulator and demodulator.
然后介绍了数字化中频处理中的采样理论、正交混频解调、滤波抽取等基础理论。
The basic theory of IF signal processing, such as sample theory, quartered demodulating technology, filtering, draw-off and interpolating theory is discussed.
通过对OFDM(正交频分复用)技术原理及测井电缆传输特性的分析，设计出满足测井电缆所需的调制解调器。
Based on analyzing the theory of OFDM (Orthogonal Frequency Division Multiplexing) and characteristic of cable transmission, the Modem of high speed cable telemetry system has been designed.
基于双多进值正交扩频系统非相干解调的硬判决信息不利于软输入软输出译码，提出了一种新型软判决信息提取算法。
This paper presented a novel decision scheme with soft output for SISO decoding when noncoherent receiver for dual M-ray orthogonal spreading symbols is employed.
提出一种适用于石油测井领域高速电缆遥测通信系统，基于自适应均衡和QAM正交振幅调制技术的调制解调器的原理和实现方法。
This paper proposed a modem based on adaptive equalization and QAM in oil logging for cable telemetry communication systems with high date rate.
中频部分主要由HFA3724正交调制解调器和基于MB1502的锁相频率合成电路等组成。
The intermediate frequency circuit includes QPSK modulation based on HFA3724, PLL circuit based on MB1502.
完成了基于FPGA平台的多频恒流激励源和数字化正交序列解调模块的设计、构建与实验验证。
Design, construction and verification test is made to complete a multi-frequency excitation source based on FPGA and to complete a digital quadrature demodulator.
当存在同步错误时，子载波之间的正交性遭到破坏，从而引起严重的载波间干扰，使解调性能大大下降。
When a synchronization error exists, the orthogonality between sub-carriers can't be maintained, serious inter-carrier interference is introduced and demodulation performance will be degraded greatly.
通信仿真平台的任务是对调幅、调频、单边带、二进制振幅键控、二进制频移键控、二进制相移键控、正交相移键控等七种通信信号的调制和解调进行建模和计算。
The target of the communication system flat is modeling and calculating to modulation and demodulation of seven kinds of signals:AM, FM, SSB, 2ASK, 2FSK, 2PSK, 2QPSK.
通信仿真平台的任务是对调幅、调频、单边带、二进制振幅键控、二进制频移键控、二进制相移键控、正交相移键控等七种通信信号的调制和解调进行建模和计算。
The target of the communication system flat is modeling and calculating to modulation and demodulation of seven kinds of signals:AM, FM, SSB, 2ASK, 2FSK, 2PSK, 2QPSK.
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