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This matlab code calculates a bit error rate of OFDM system over a flequency-selective Rayleigh fading channel.

说明：  多普勒效应分析及模拟 详细分析了多配了效应得情形。用MATLAB模拟并得到频移图谱(Multipath and Doppler Effects and Models)

完整版的频谱检测算法的MATLAB实现，有原理，有程序，有结果。(Full version of the spectrum to achieve detection algorithm of MATLAB, there are principles, procedures and results.)

从曲线中检测到其峰值：先利用二次求导得到所有凸点，设置门限，去除过低的凸点，然后利用滑动窗的方法，在凸点中求得满足峰值要求的点(Detected from the curve to its peak: the first use of the second derivative method to get all the bumps, set the threshold too low to remove the bumps, and then use a sliding window, obtained in a bump to meet peak requirements of point)

说明：  用蚁群算法解决VRP问题，包含基本蚁群算法（我记得不含时间窗约束）(Using ant colony algorithm to solve VRP problem, including basic ant colony algorithm)

OFDM系统下，系统容量和系统信干比的关系曲线(OFDM system, the system capacity and system signal to interference ratio curve)

说明：  Matlab中用于求解精确的单位阶跃响应的超调量与过渡时间的函数，详见函数说明(Matlab, used to solve the exact step response overshoot and the transition function of time, see function description)

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调频电路的matlab simulink 仿真(The objectives of this laboratory are: To investigate frequency modulation characteristics in the frequency domain. To implement a classical double-tuned FM demodulator and measure its characteristics. To implement a modern PLL FM demodulator and measure its characteristics. To investigate the effect of FM signal bandwidth on the detected signal-to-noise ratio.)

用于仿真雷达基础函数-线性调频函数和实验结果分析(simulate LFM for radar, results are also include.)