Freq_Shift_key

matlab环境下的用于图像处理的代码，适合初学者使用(code in matlab,it is good to the person who learns matlab or imaging process not long)

数字信号处理，LMS和RLS实例：给定正弦信号s(n)，现在我们获得得是受影响的数据x(n)=s(n)+v(n) ， v(n)为方差1.25的告示白噪声信号，请设计一个滤波器，使其输出与s(n)的均方误差最小，并给出用LMS和RLS算法的自适应求解方法的MATLAB仿真。(Digital signal processing, LMS and RLS instance: Given a sinusoidal signal s (n), now we get the data have affected x (n) = s (n)+ v (n), v (n) 1.25 for the variance Notice the white noise signal, to design a filter so that the output and s (n) The minimum mean square error, and gives the algorithm with the LMS and RLS adaptive method for solving the MATLAB simulation.)

说明：  任务：设计一个4×2.5Gbit/s 长距离光纤传输系统，并利用OptiSystem 仿真验证。 要求： 1．采用波分复用技术，波长设置以100GHz 为间隔，频率分别为193.1THz、193.2THz、193.3THz、193.4THz，每个波长传输速率为2.5Gbit/s（NRZ），传输距离为300km。采用常规光纤，光纤损耗系数为0.25dB/km。 2．单通道光发送机最大输出功率为0dBm，光接收机的接收光功率不低于－26dBm，过载点为－10dBm。 3．可以采用EDFA 作为线路放大器，其中EDFA 的输入功率限制在－18～2dBm，最大输出功率20dBm，增益范围为13～25dB，噪声指数4.0dB。(Task: Design a 4 x 2.5 Gbit/s long-distance optical fiber transmission system, and use OptiSystem simulation to verify. Requirement: 1. Using wavelength division multiplexing technology, the wavelength is set at 100GHz intervals, with frequencies of 193.1 THz, 193.2 THz, 193.3 THz and 193.4 THz, respectively. The transmission rate of each wavelength is 2.5 Gbit/s (NRZ), and the transmission distance is 300 km. The loss coefficient of conventional optical fibers is 0.25dB/km. 2. The maximum output power of a single-channel optical transmitter is 0 dBm, and the receiving power of an optical receiver is not less than -26 dBm, and the overload point is -10 dBm. 3. EDFA can be used as line amplifier, where the input power of EDFA is limited to - 18-2dBm, the maximum output power is 20dBm, the gain range is 13-25dB, and the noise index is 4.0dB.)

这段代码是从类平均向量中提取判别信息的matlab代码(This code is from the category average Discriminant Vector extract information matlab code)

考察了在不同信噪比情况下，信息论准则和盖氏圆准则估计信号源数目的正确率(The correct rate of the SNR, the information criterion and Gerschgorin criterion estimated the number of source)

说明：  二维梁单元有限元分析，包中有详细的WORD文档说明(Two-dimensional finite element analysis of beam elements, including the documentation detailed WORD)

进行通信编程时候需要参考使用，还比较方便(Communication program to use when you need a reference, but also more convenient)

这是一个matlab程序：实现二阶系统的超前滞后校正。(This is a matlab program: second-order system lead-lag correction.)

说明：  一个很简单，易于明白的matlab文件，适合初学者自学(A very simple and easy to understand the matlab file, suitable for beginners learning)

Antenna and EM Modeling with MATLAB