实现软正交矢量型LIA法，本文利用互相关算法，在 MATLAB 环境下完成了软正交矢量型 LIA 相关器的仿真实现，并针对不同的噪声信号情况进行了验证与讨论。利用软正交矢量型 LIA 可以实现噪声干扰很大的情况下的微弱信号检测，并具备节约硬件成本、抗干扰能力强等诸多优点，在诸如薄板缺陷检测等方面有广阔的应用价值。(Soft orthogonal vector LIA method is realized. In this paper, the soft orthogonal vector LIA correlator is simulated in MATLAB environment by using cross correlation algorithm, and it is verified and discussed for different noise signals. Soft orthogonal vector LIA can be used to detect weak signals with great noise interference. It has many advantages, such as saving hardware cost, strong anti-interference ability and so on. It has broad application value in such areas as thin plate defect detection.)