codelength_recogcompare_BCH157

说明：  FSK差分检波系统仿真的课程设计 本课程设计主要利用MATLAB集成环境下的Simulink仿真平台，设计一个FSK信号差分检波系统。观察FSK调制前后的信号波形,并对调制前后信号的频谱进行分析,再以调制信号为输入，构建差分检波解调系统电路，观察解调前后的信号波形，并对解调前后信号的频谱进行分析。加入噪声分析通过三种不同信道FSK信号差分检波系统接受信号的性能。仿真结果，基本达到课程设计要求。(FSK differential detection system simulation of the curriculum design of this course the main use of MATLAB integrated design environment of Simulink simulation platform, the design of a FSK signal differential detection system. Observed before and after FSK modulation signal waveforms, and modulation signal spectrum before and after analysis, and then modulated signal as input, build a system of differential detection demodulator circuits, observe the pre-and post-demodulation signal waveforms, and signal demodulation spectrum before and after analysis. Adding noise analysis through the three different channel FSK signal differential signal detection system to accept performance. The simulation results, the basic courses to meet the design requirements.)

matlab灰色预测模型问题，并求出相对误差(The problem of the matlab gray prediction model, and calculated the relative error)

有源低通巴特沃斯滤波器设计根据给定的参数值设计有源滤波器(Active low-pass Butterworth filter design parameters according to the given active filter design)

自适应算法中的LMS算法的例子，以及空间谱算法中SER算法的实例，希望能对你有帮助。(adaptive algorithm LMS algorithm example, as well as spatial spectral algorithm SER algorithm example, The hope is to help you.)

复杂网络算法与应用教程的例子源代码，对复杂网络学习和实验有提高(Complex network algorithm and Application Tutorial example source code, complex network learning and experiment has been improved.)

matlab中编写的提取语音信号的mfcc(matlab prepared in the extraction of speech signals mfcc)

largest lyapanov exponent finder

matlab voicing procecing box

As we know, the energy needed for sensors should be electrical. So the rst step before start to work is to convert environmental energy to electrical one. Inside the node there are dierent components for sensing the area, collecting data and processing the data. So the main dierent part of this kind of nodes, in compare of WSN nodes, is the power part. Once the stored energy reach to a certain amount, the power supply for micro controller and transceiver will start to work. They will continue to work until they have energy, as soon as the energy nish, they stops and energy storage device start to work to save energy again. The other fact should be consider about EH-WSN node is that the available energy can change in dierent nodes. So every node has its own harvesting rate.

内含：1）在同一纬度下不同斜距时比较重力简易算法和拉普拉斯算法的误差曲线；2）在同一斜距不同纬度下两种重力算法的误差曲线。内含各自的运行程序。(Contains: 1) under the same latitude different slant distance compare gravity simple algorithm and error curve of the Laplace algorithm 2) in the same slope distance under different latitude error curves of two kinds of gravity algorithm. With their own to run the program.)