2D-DOA-estimation

给出Henon的模型x(i+1)=1+y(i)-a*x(i)^2 y(i+1)=b*x(i) (Henon model given x (i+ 1) = 1+ Y (i)-a* x (i) ^ 2 y (i+ 1) = b* x (i))

说明：  用欧拉法计算微积分的源代码，以及改进的欧拉法，用matlab实现(Euler method with the source code of calculus, and the modified Euler method, using matlab implementation)

光纤布拉格光栅的matlab的具体代码设计。(Fiber Bragg Grating matlab specific code design.)

实现图像的对数极坐标变换，具有旋转不变性，可用于数字水印的抗几何攻击(achieving the right number of images Polar transform, with a rotating invariance, the digital watermark can be used against geometric attack)

用于解决航天动力学，航天任务设计，导航制导控制问题(The Java Astrodynamics Toolkit is a library of components to help users create their own application programs to solve problems in astrodynamics, mission design, spacecraft navigation, guidance and control using Java or Matlab.)

第一步是计算输人信号单边功率谱密度（ESD）。使用快 ％速傅里叶（FFr）算法将信号从时域转换到频域。因为FFr算法的输出是离散谱，而这 ％里我们需要的是连续谱，因此需要引人不同的比例因子来实现从离散谱到连续谱的转换。 ％在第二步中，我们利用迭代算法计算出相对于特定阂值的ESD的最高和最低频率，从而 ％估算出被检测信号所占用的带宽。这种算法同时适用于基带信号和已调制信号。最后， ％在第三步中，我们给出了输出图形的原代码。(The first step is calculating the input signal unilateral power spectral density (ESD). The use of fast Fourier speed (FFr) algorithm for the signal conversion from time domain to frequency domain. FFR algorithm because the output is a discrete spectrum, which we need is a continuous spectrum, so the need for food of different scale factor to achieve from the discrete spectrum to continuous spectrum conversion. In the second step, we use iterative algorithm to calculate a specific threshold in relation to the ESD of the highest and lowest frequency, thus estimated to be occupied by the signal detection bandwidth. This algorithm applies to both baseband signal and modulation signals. Finally, in the third step, we give the graphical output of the original code.)

MINIMUM SHIFT KEYING WAVEFORM IN MATLAB

改进的pso算法（3个m文件和一个说明文件）： 本算法实现Clerc and Kennedy 2002年对pso算法的重要改进(The improved PSO algorithm (3 M files and a description of the file): An important improvement of Clerc and Kennedy in 2002 on the PSO algorithm this algorithm)

哈夫变换提取参数 matlab实现 附带测试图像(Hough transform extracted parameters to achieve incidental test images matlab)

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