为了在CDMA系统中更好地应用QDPSK数字调制方式，在分析四相相对移相（QDPSK)信号调制解调原理的基础上，设计了一种QDPSK调制解调电路，它包括串并转换、差分编码、四相载波产生和选相、相干解调、差分译码和并串转换电路。在MAX+PLUSⅡ软件平台上，进行了编译和波形仿真。综合后下载到复杂可编程逻辑器件EPM7128SLC84-15中，测试结果表明，调制电路能正确选相，解调电路输出数据与QDPSK调制输入数据完全一致，达到了预期的设计要求。 Abstract: In order to realize the better application of digital modulation mode QDPSK in the CDMA system， a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential encoding circuit, four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference decoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUSⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test result shows that the modulation circuit can exactly choose the phase，and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.
上传时间： 2013-10-28
上传用户：jyycc
Logger iButton devices have gained a lot of popularity with researchers. Although free evaluation software is easy to use and welldocumented, the choices and inputs that need to be made can sometimes be challenging. This application note explains technicalterms that are common with temperature logger iButtons and how they relate to each other. Additionally, it presents an algorithm tohelp users choose the necessary input parameters, including the sample rate based on a user's needs and the available memory tostore the data.
上传时间： 2013-11-16
上传用户：xywhw1
The purpose of this computer program is to allow the user to construct, train and test differenttypes of artificial neural networks. By implementing the concepts of templates, inheritance andderived classes from C++ object oriented programming, the necessity for declaring multiple largestructures and duplicate attributes is reduced. Utilizing dynamic binding and memory allocationafforded by C++, the user can choose to develop four separate types of neural networks:
标签： differenttype construct computer purpose
上传时间： 2013-12-06
上传用户：13517191407
FCMDEMO displays a GUI window to let you try out various parameters in fuzzy c-means clustering for 2-D data. You can choose the data set and clustering number from the GUI buttons at right, and then click "Start" to start the fuzzy clustering process.
标签： clustering parameters displays FCMDEMO
上传时间： 2014-01-23
上传用户：bjgaofei
This applet illustrates the prediction capabilities of the multi-layer perceptrons. It allows to define an input signal on which prediction will be performed. The user can choose the number of input units, hidden units and output units, as well as the delay between the input series and the predicted output series. Then it is possible to observe interesting prediction properties.
标签： capabilities illustrates multi-layer perceptrons
上传时间： 2015-06-17
上传用户：lnnn30
This demo nstrates the use of the reversible jump MCMC simulated annealing for neural networks. This algorithm enables us to maximise the joint posterior distribution of the network parameters and the number of basis function. It performs a global search in the joint space of the parameters and number of parameters, thereby surmounting the problem of local minima. It allows the user to choose among various model selection criteria, including AIC, BIC and MDL
标签： This reversible annealing the
上传时间： 2015-07-19
上传用户：ma1301115706
This a software runing on the matlab, it is used in the channel coding simulation. It include DVB-S2 LDPC, Covolution turbo, and block turbo code, You can choose which channel coding to run. it run the encoder and add white noise in the channel, then it run the decoder, and compute the error rate.
标签： simulation the software channel
上传时间： 2015-08-06
上传用户：
％ binomial.m by David Terr, Raytheon, 5-11-04, from mathworks.com ％ Given nonnegative integers n and m with m<=n, compute the ％ binomial coefficient n choose m.
标签： nonnegative mathworks binomial Raytheon
上传时间： 2015-08-27
上传用户：mhp0114
LCD and Keyboard ARMulator model for the ADS Source Code Copy the provided ARMulate folder into your ADS directory tree at the root, for example in c:\ADSv1_1. If prompted to overwrite files, choose Yes. The batch file copy_console.bat will place the appropriate files inside the \Bin directory so that they will be found by the ARMulator. You still need to follow the instructions under "Using the Model" to set up the configuration files.
标签： ARMulator the Keyboard ARMulate
上传时间： 2014-02-25
上传用户：woshini123456
in this paper,we show that an efficient multiscale wedgelet decomposition is possible if we carefully choose the set of possible wedgelet orientations.
标签： decomposition multiscale efficient carefull
上传时间： 2015-10-22
上传用户：qweqweqwe
