传感器利用注入结电流直接调频的半导体激光(LD)产生外差干涉，从而实现了干涉相位的线性检测。
A heterodyne interference is caused by a frequency modulation of a laser diode (LD) with a ramp injection current, and a linear phase detection is realized.
FIR数字滤波器以其良好的线性相位特性被广泛使用于现代电子系统中。
In the modern electrical system, FIR digital filter is widely favorable for many applications due to its well linear phase characteristics.
与基于相位-坐标关系的非线性小数重合法相比，该算法的数学表述更加明晰，应用也更加方便。
Compared with the nonlinear excess fraction method based on phase coordinate relations, this algorithm is clearer mathematically and more convenient for applications.
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