curvefit

tricolor attenuation model

例4：在sinc(t)信号中叠加噪声，分析对应频谱 fs=100 采样频率,必须大于两倍基带信号最高频率 ts=1/fs 采样时间间隔 T=2 时间窗大小 ( x=x+0.1*randn(1,N) x=awgn(x,-10, measured ) figure plot(t,x) title( 时域信号图 ) xlabel( t /s ) y=fft(x,N) figure if mod(N,2)~=0 N=N-1 end f=linspace(0,fs/2,N/2) plot(f,abs(y(1:N/2))*2/N) title( 叠加噪声的sinc(t)信号频谱 ) xlabel( f /Hz ) figure y0=y(1:N/2) P=y0.*conj(y0)/N P=10*log10(P) plot(f,P) title( 功率谱 ) xlabel( f /Hz ) )

多模光纤的信道特性研究，以上是其全部代码。主要针对多模光纤的高频带通特性 (multimode fiber channel characteristics, and above all its code. Targeted at multi-mode fiber high-frequency band-pass characteristics)

CINEMATIC MODEL OF A ROBOT

对要发送的序列进行上变频，上变频到21MHz后进行发送。(change the frequence uop to the one that suit for transmission,which here is 21MHz.)

some paper talk about how to use hmm train data (some paper talk about how to use hmm train data )

研究了合成权值的补偿相位估计性能，分析了天线数对算法性能的影响，适合于低信噪比(Studied the synthetic weight to compensate the phase estimation performance, analyzed the antenna effect the performance of the algorithm, is suitable for low signal-to-noise ratio )

matlab code of ssim of image quality

阵元间隔为半波长的均匀分布16元线阵，预成指向士arcsin（(2i-1)/16）(i=l，2，…，8)的16个均匀加权常规波束,远场有5个互不相关的目标源发射信号，每个源相对于基阵的方位为-40，-42，-5，30和33，且每个信号源到达基阵的信噪比相同，均为5DB，快拍数为1000.(Array element spacing of half wavelength for the uniform distribution of 16 per linear array, pre-point disabilities into arcsin ((2i-1)/16) (i = l, 2, ..., 8) of 16 evenly weighted conventional beam, far-field has 5 unrelated target the source of emission signals, each source array relative to the position for the-40,-42,-5,30 and 33, and each signal source to the array signal to noise ratio the same as Scientology, are 5DB, snapshots for 1000)

改程序在Turbo C或Visual 6.0中编译，能够实现基2的快速的傅里叶变换。(Reform program in Turbo C or Visual 6.0 compiled, enables fast Fourier transform base 2.)