carrier recovery

The structure of circuit for carrier recovery is perfected in engineering,and the problem of error-lock for frequency-shift carrier is eliminated.

介绍了平方变换法相干解调原理,从工程角度完善了载波提取的电路结构,消除了频移载波的误锁问题。

Simulation of PSK Carrier-Frequency Extraction Based on Improved Wavelet-ridge Method;

基于改进小波脊线的PSK信号载频提取技术仿真

Effect of microwave-assisted extraction on flavone constituents of Pollen Tyhae micropowder;

微波提取对蒲黄超微粉中黄酮类成分影响的研究

Conclusion Solidroside with high purity can be obtained by combining microwave-assisted extraction .

方法以红景天苷的收得率为评价指标,结合大孔吸附树脂分离、精制,比较溶剂提取和微波提取的效率。

Results The optimum microwave-assisted extraction(MAE) condition was dosage liquor(1:40) and extracting with 75% alcohol-0.

结果采用微波提取功率为中火(385W)、体积比(1:1)的75%乙醇和0。

Stady on microwave extraction and stability of pigment in Sappan;

苏木色素的微波提取及稳定性研究

he effect of microwave extraction on the extraction race of arecoline from Areca;

微波提取法对槟榔中槟榔碱的提取率的影响

Study on extracting active ginsenoside from panax ginseng by microwave extraction;

微波提取人参中活性成分人参皂苷的研究

The surfactant assisted extraction(SAE) was integrated with microwave assisted extraction(MAE) to extract a kind of pigment from Polygonum Cusdidotum Steb.

研究结果表明:利用表面活性剂协同微波提取技术,通过优化工艺条件,可以大幅缩短提取时间和提高提取率,该法的优化条件为:原料为2 g虎杖干粉,提取剂为0。

The optimal conditions for microwave assisted extraction are as follows:solid-to-liquid 1:5 (g:mL);five times interval radiation with 50 seconds pe.

比较常规回流提取与微波提取法对石榴籽油的提取率,并采用正交实验法优选微波提取最佳工艺条件。

Research on the use of the microwave assisted extraction for the extraction of pectin from passion skin;

探讨了液料比、微波功率、微波提取时间、提取液pH值对果胶产率的影响。

Carrier-frequency Capture Base on Bispectrum Estimation under Extremely Low SNR and Large Doppler Frequency Shifting

极低信噪比大多普勒频移条件下基于双谱实现载频提取

Research on Carrier Synchronization Algorithm and Observations Extraction Technique in SS Navigation Receiver

中短波扩频导航接收机载波同步与观测量提取研究

A New Apprach to Improve the Accuracy in Real-time Extraction of Basic Pitch

一种提高基频实时提取精度的新方法

Study on the Segmentation of Video Object Plane and Extraction of Video Object;

视频对象平面分割和视频对象提取方法的研究

Detection and Characteristic Parameters Estimation of Frequency-Hopping Signal Using Time-Frequency Analysis;

基于时频分析的跳频信号检测与特征提取

Method Study of Adaptive Time-frequency Analysis and Time-frequency Attributes Extraction;

自适应时频分析及其时频属性提取方法研究

Feature extraction for passive sonar target based on critical band spectrum energy

被动声纳目标临界频带频谱能量的特征提取

Extracting Key Frames from Video Based on Text and Image Information

基于文字和图像信息提取视频关键帧

Study of Extracting Multi-frequency Information of Magnetic Abnormity and Its Application;

磁异常多频段信息的提取及应用研究

The Methods of Vehicle Information Video Extracting and Their Application;

车辆信息的视频提取方法及应用研究

Video Vehicle Tracking and Traffic Information Extraction;

基于视频的车辆跟踪与交通信息提取

Research of Video Object Extraction and Tracking Approach;

视频运动对象提取和跟踪方法的研究

DSP-based Video Image Feature Extraction;

基于DSP的视频图像特征提取技术

Research on Motion Feature Extraction Method in Digital Video;

数字视频中的运动特征提取方法研究

Research on Algorithm of Embedding and Extracting Multi-watermarking from Digital Audio Signal;

数字音频多水印嵌入与提取方法研究

Feature extraction of ultrasonic echo signals(RF);

超声回波射频(RF)信号的特征值提取

Research on Object Extraction and Tracking Based on MPEG-4 Video Objects

基于MPEG-4视频对象提取和跟踪研究

Signal Feature Extraction Base on Factral dimensions of Time-Frequency Domain

基于时频域分形维数的信号特征提取