OFDM

说明：  多维数据处理：MATLAB源程序用于处理多维数据(multidimensional data processing : MATLAB source for dealing with multidimensional data)

C++求圆的面积小程序 输入圆的半径，便可以求出圆的面积。。 主要熟悉C++编程(C++ calculate a area of ​ ​ a circle program)

说明：  双音频按键识别 背景： 打电话拨号时，每次按键会发出不同的声音，这些声音实际上是由一些固定频率的正弦信号合成的。因为每个按键声音包含两个不同频率的正弦信号，因此也被称为“双音频”信号，简记为DTMF。这相当于是对不同键位用‘音频’进行了编码，如同计算机领域中用数字0和1对处理对象（包括键盘）进行编码。(Two-tone buttons identify Background: When you call dial, each key emits different sounds, which is actually made up of some fixed frequency sinusoidal signal synthesis. Because the sound of each key contains two sinusoidal signals of different frequencies, it is also known as &quot two-tone&quot signal, abbreviated as DTMF. This is equivalent to different keys using the ' audio' encoded, as the computer industry with the numbers 0 and 1 pair of processing object (including the keyboard) to be encoded.)

说明：  本程序给出了认知无线电中的能量检测方法，并实现了在不同的虚警概率下的检测性能比较。(This procedure gives the method of energy detection of cognitive radio , and the comparison of detection performance at different false alarm probability .)

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.)

说明：  经典无网格教程的随书算法的例程，属于第5章例程(Classical meshless algorithm tutorial routines with books belonging to Chapter 5 routine)

说明：  利用MATLAB可以产生各种形式的随机数，进行随机解决一些实际问题（系统的寿命、重积分、预测公司经营）(using MATLAB can produce various forms of random numbers, random solve some practical problems (system of life, re-integration, the company forecast operating))

优化设计方法 --------无约束优化方法(design optimization methods-------- unconstrained optimization methods)

digital processing cm in speech coding

The article concerns observing states of the Induction Motor (IM) using a Luenberger observer in the speed servo drive. The movement of the motor and observer roots is analyzed for a variable speed. Following the analysis, a new method for gain evaluation of the IM magnetic flux observer is presented. This structure is extended by including an adaptive speed observer. The functionality of the presented method is proved in simulations using MATLAB Simulink.