信道

sigmoid函数硬件实现，verilog代码及其测试用例(Sigmoid function hardware implementation, verilog code and test cases)

说明：  初学者学习Fortran的课件，蛮有用的(Fortran for beginners learning courseware, giving a pleasing use)

仿真线性调频连续波雷达的信号处理，设线性调频带宽为22MHz，时宽为200us ，雷达载频为10GHz，输入噪声为高斯白噪声。目标模拟分单目标和双目标两种情况。(Simulation of linear frequency modulation continuous wave radar signal processing, linear frequency modulation of 22 MHZ bandwidth, wide for 200 us, radar carrier frequency for 10 GHZ, the input noise is the gaussian white noise target simulation of single and double target two cases.)

简单计算器的界面代码，以及实现相关功能,加减乘除清零等(Simple calculator interface code, as well as the relevant functions)

STM32F051比较器与定时器实现逐周期电流控制(The STM32F051 comparator with timer periodic current control)

用三个按键控制pwm输出 key0控制是选着显示/改变频率或占空比 key1控制增加 key2控制减少 数码管显示频率或占空比 频率单位默认Hz（500-20KHz） 占空比范围（0.1-0.9）(Control PWM output with three keys Key0 controls display/change frequency or duty cycle optionally Key1 controls the increase Key2 controls are reduced Digital tube display frequency or duty ratio Frequency unit default Hz (500-20khz) Duty cycle range (0.1-0.9))

bool AABB::intersects(const AABB &p_aabb) const { if (position.x >= (p_aabb.position.x + p_aabb.size.x)) return false;

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说明：  cop2000实现无符号数乘法——两个8位无符号数相乘，所乘结果是16位，采用原码一位乘，在计算时，用乘数寄存器的最低位来控制部分积是否与被乘数相加，然后右移部分积和乘数，同时乘数寄存器接收部分积右移出来的一位，完成运算后，部分积寄存器保存乘积的高位部分，乘数寄存器中保存乘积的低位部分。(Cop2000 implements unsigned number multiplication-multiplication of two 8-bit unsigned numbers. The multiplied result is 16 bits. When calculating, the lowest bit of multiplier register is used to control whether or not the partial product is added to the multiplier, and then the partial product and multiplier are moved right. At the same time, the multiplier register receives the right-shifted bit of the partial product. After completing the operation, the partial product register saves the product. The higher part, the lower part of the product is saved in the multiplier register.)

适用于不小心更新了windows系统的用户，可以去除一直显示在屏幕左下角的恶心的小星-apply to careless update of the Windows system users, Removal can be displayed on the screen have been the lower left-hand corner of the small-nausea