fdtdtianxian

录制一段自己的语音信号，并对录制的信号进行采样；画出采样后语音信号的时域波形和频谱图；给定滤波器的性能指标，采用窗函数法和双线性变换设计滤波器，并画出滤波器的频率响应；然后用自己设计的滤波器对采集的信号进行滤波，画出滤波后信号的时域波形和频谱，并对滤波前后的信号进行对比，分析信号的变化；回放语音信号；最后，设计一个信号处理系统界面。(Section of their own voice recording signal, and recording the signal sampling draw sample after the speech signal time-domain waveform and frequency spectrum given filter performance indicators, using a window function method and bilinear transformation design of filters, and draw the frequency response filter then use the filter of their own design for the signal acquisition filtering, after filtering the signal to draw the time-domain waveform and spectrum, and filtering of signals before and after contrast, analysis of signal changes playback voice signal Finally, the design of a signal processing system interface.)

让某一频率以下的信号分量通过，而对该频率以上的信号分量大大抑制的电容、电感与电阻等器件的组合装置。 (low-pass filter )

《MATLAB神经网络30个案例分析》中的第7个例子，案例7 RBF网络的回归-非线性函数回归的实现。希望对大家有一定的帮助！ (The MATLAB neural network analysis of 30 cases of example, 7 cases of RBF network return- the return of nonlinear function implementation. Hope to have certain help to everybody! )

可以改善其时延较长的问题,但以往技术是针对每一跳候选节点的休眠时延进行优化的(Implementation algorithm optimization to achieve the connection of WSN)

一种精确测量间谐波的方法，可以准确检测电力系统的信号(An accurate method of measuring inter-harmonics, power system can accurately detect the signal)

双闭环调速控制系统MATLAB程序，可以用来实现双闭环调速系统控制。(DC control system)

利用matlab开发的偏微分方程图形图像处理小程序，效果非常好，简单易用(using Matlab development of the PDE small graphic image processing procedures, the effect is very good, simple and easy)

Wifi Simulator for 802.11a Simulation

说明：  OFDM是将高速串行数据分成成百上千路并行数据,并分别对不同的载频进行调制,这种并行传输体制大大扩展了符号的脉冲宽度,提高了抗多径衰落的性能。同时,在传统的频分复用方法中,各子载波之间的频谱互不重叠,频谱利用率较低。而采用OFDM技术,一个OFDM符号之内包括多个经过调制的子载波的合成信号,每个子载波在频谱上相互重叠,这些频谱在整个符号周期内满足正交性,因而在接受端可以保证无失真恢复,从而大大提高频谱利用率。(OFDM divides high-speed serial data into hundreds of parallel data channels and modulates different carrier frequency separately. This parallel transmission system greatly expands the pulse width of symbols and improves the performance of anti-multipath fading. At the same time, in the traditional method of Frequency Division multiplexing, the spectrum between the sub-carriers does not overlap each other, the spectrum utilization ratio is low. In the case of OFDM, an OFDM symbol consists of multiple modulated sub-carriers, each of which overlaps in the spectrum, which is orthogonal throughout the symbol period, thus, no distortion recovery can be ensured at the receiving end, thus greatly improving the spectrum utilization ratio.)

Mahafza的使用matlab的雷达信号分析和处理，很好的书，书中有很多matlab的例子(Mahafza use matlab radar signal analysis and processing, very good book, the book has many examples of matlab)