单极性归零线路码psd不等于理论计算

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现在，我尝试通过MATLAB计算单极RZ线路代码PSD，如下所示，可以直接复制到MATLAB中进行仿真，并在代码中绘制FFT仿真和理论结果，为更好地理解，我输入了理论等式是 https://www.mathworks.com/matlabcentral/answers/uploaded_files/230277/Image%2019.png 但是结果不相等，FFT结果谐波频谱不等于理论计算值，您能帮我检查一下代码吗？谢谢。 https://www.mathworks.com/matlabcentral/answers/uploaded_files/230259/Image%2016.png

import React, { Component } from "react";
import ReactDOM from "react-dom";
import * as THREE from "three";
import Detector from 'detector-webgl';
this.THREE =THREE;
const OrbitControls = require("three-orbit-controls")(this.THREE);

class Game{
  constructor(){
    if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
    this.container;
    this.player = { };
    this.stats;
    this.controls;
    this.camera;
    this.scene;
    this.renderer;
      ...

class App extends Component {
  componentDidMount() {
    this.THREE = THREE;
    this.Game = new Game;
    ...