DFT

optimisation generateur PV

针对频率周期振荡的振动系统讨论自适应控制问题,在频率跟踪的基础上对频率变化的振动响应进行控 制,给出相应的估计、滤波与控制方法。首先在子空间辨识原理的基础上,通过测量信号自相关序列的递推运算获得信号 频率 然后根据估计频率实时调整带通滤波器的中心频率,使其跟踪信号频率,实现信号分量的跟踪滤波 最后在LMS方 法的基础上构造对信号分量进行控制的自适应控制器。(The adaptive vibration control of systems excited by forces of periodically varying frequencieswas dis- cussed. The presented adaptive controlwas realized on the basis of tracking of time-varying frequencies and amethod for online frequency estimation, filtering and controlwas proposed. Based on the principle of subspace identification, the time-varying frequencieswere estimated from the recursively computed autocorrelation ofmeasured signals. )

speech compression by dct adpcm

boc调制及绘制功率谱,给出了boc调制程序及图形的绘制(boc modulation and draw power spectrum, the the boc modulation procedures and graphics rendering)

将OFDM技术运用在可见光通信的研究，并且把OFDM的高峰均比这一缺点进行了建设性的运用。(In particular, the use of OFDM (orthogonal frequency division multiplexing) for intensity modulation is investigated. The high peak-to-average ratio (PAR) in OFDM is usually considered a disadvantage in radio frequency transmission systems due to non-linearities of the power amplifier. It is demonstrated theoretically and by means of an experimental system that the high PAR in OFDM can be exploited constructively in visible light communication to intensity modulate LEDs. It is shown that the theoretical and the experimental results match very closely, and that it is possible to cover a distance of up to one meter using a single LED.)

正弦函数的离散傅里叶变换，输出傅里叶变换系数(Discrete Fourier sine transform, Fourier transform coefficients output)

递推偏最小二乘法的源程序，确定转换参数，解释原始信号和噪声(Using a sequence of data to trace-back parameter of a transfer function. explain step-by-step easily to this time the original signal+noise MATLAB 7.1.0 (R14SP3) identification, parameter, recursive, rls )

图像处理，图像的峰值信噪比PSNR，matlab代码例程，验证可用(Image processing, image the peak signal to noise ratio PSNR, matlab code routines can be used to verify)

Matlab最优化计算中的无约束一维极值问题(Matlab optimization calculations for unconstrained one-dimensional extremum problems)

Mathematical model of Induction generator