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使用PLL design assistant程序进行PLL设计(PLL design using the PLL design assistant program)

Space-Time Codes and MIMO Systems书籍及书籍内matlab代码程序，程序非常好，对研究MIMO系统的研究人员很有用(Space-Time Codes and MIMO Systems book and matlab code)

说明：  利用最小二乘原理建立了趋势项的一般模型，并利用MATLAB软件强大的矩阵计算功能，对一个含有非线性趋势项的周期信号进行了趋势项消除，并得到了预期效果。(Using the least squares principle to establish a trend term, the general model and the use of MATLAB software is powerful matrix calculation function, for a linear trend term with periodic signals the trend for elimination, and get the desired effect. )

干涉仪测向具有精度高、速度快的特点，在无源探测定位系统中具有广泛的应用。传统干涉仪依靠短基线保证无模糊测向范围，依靠长基线保证测向精度，采用整数阶基线比。该方法在宽带应用条件下难以实现，且对天线阵的安装位置非常敏感。本课题研究分数阶干涉仪测向的算法，同时实现宽带、高精度、无模糊的要求，并研究不同分数比、相位测量误差对测向精度的影响，进行仿真验证。 (interferometer is measured to high accuracy and fast, in the passive position detection system has wide application. Rely on traditional interferometer no guarantee short baseline measurement to the scope of fuzzy, relying on long baseline measurement to ensure accuracy, using integer band than the baseline. The method in broadband applications under difficult conditions and the right antenna installation location is very sensitive. The research fractional interferometer to test the algorithm, while achieving wide-band, high-precision, without ambiguity, and different than the scores, phase measurement error to the measurement accuracy of the impact simulation test.)

频率估计，用了最基本的Rife算法，和导数法。同时计算了平均频率和均方差值(Frequency estimation, using the most basic Rife algorithm and derivative method. The mean frequency and mean square difference are also calculated)

partial differential equation 4 matlab

采用神经网络技术模拟地震发生的频率与震级。(using neural network technology simulated earthquake frequency and magnitude.)

Artificial Bee Colony (ABC) is one of the most recently defined algorithms by Dervis Karaboga in 2005, motivated by the intelligent behavior of honey bees. It is as simple as Particle Swarm Optimization (PSO) and Differential Evolution (DE) algorithms, and uses only common control parameters such as colony size and maximum cycle number. ABC as an optimization tool, provides a population-based search procedure in which individuals called foods positions are modified by the artificial bees with time and the bee’s aim is to discover the places of food sources with high nectar amount and finally the one with the highest nectar.

这个Matlab程序实现最速下降算法。最速下降法是一种最基本的算法，它在最优化方法中占有重要地位.最速下降法的优点是工作量小，存储储变量较少,初始点要求不高；缺点是收敛慢，最速下降法适用于寻优过程的前期迭代或作为间插步骤，当接近极值点时，宜选用别种收敛快的算法. (The Matlab program to achieve the steepest descent algorithm. Steepest descent method is a basic algorithm, it occupies an important position in the optimization method. Advantage of the steepest descent method is the small amount of work, less storage reservoir variables, the initial point less demanding drawback is slow convergence, the steepest descent method for the optimization process of the early iterations, or as inserted steps are advised to use other kinds of fast convergence of the algorithm when close to the extreme point.)

matlab中在有限的空间显示一张大图片，也是从matlab论坛中得到的(matlab display in the limited space in a big picture, is also derived from the matlab forum)