jiaoliufangzhen

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.)

chen分数阶的吸引子仿真，很容易实现的，希望可以帮助你。一起学习混沌吧。(chen fractional attractor simulation, it is easy to achieve, I hope you can help. With learning chaos.)

MATLAB平台下的基于人工神经网络的非线性控制系统PID参数整定代码，能实现在线调节功能。(MATLAB platform artificial neural network-based nonlinear control system PID parameter tuning code, to achieve regulatory function online.)

pso code, a very good code using matlab

Fast Fourier Transform without using MATLAB toolbox

说明：  汽车防抱死系统（以下简称ABS）对于缩短汽车的制动距离、增加汽车制动时的方向稳定性、减少汽车制动过程中的侧滑以及提高汽车制动时的安全性具有非常重要的意义。(Automotive anti-lock braking system (hereinafter referred to as ABS) to reduce the car' s braking distance, the increase in vehicle directional stability when braking, reduce vehicle skidding during braking and to improve the safety of vehicle braking is very important significance.)

MIMOofdm系统误符号率的变化(G)，可以为MIMO信道建模提供详细代码(MIMOofdm changes in the system symbol error rate (G), MIMO channel modeling can provide detailed code)

介绍了各种PID算法，以及对各种PID算法进行了matlab编程仿真(Describes the various PID algorithm, as well as a variety of PID algorithm matlab simulation program)

Autocorrelation Function - Matlab - Useful Econometrics Tool

cantor dust programm using iteration