基于最小二乘法实现精确到采样点间的准确定时，性能远远高于双程测距方法实现的测距与定时。仿真表明此方法对于抗噪声和频偏具有很好的作用。这是源代码，用matlab编写，项目要求实现10ns的精度实际中我们实现了3ns以内的精度。-Based on least square method to achieve precise sampling points of accurate timing between, performance is much higher than the round tri