编写MATLAB程序，讨论在 ??_0=5×〖10〗^(?5)的加性高斯白噪声环境中，利用匹配滤波器检测幅度为2，宽度为1ms的方波信号的情况(考虑取样时间为Ts=0.1ms)，测量匹配滤波器输入信号中心处与输出信号最佳取样处的SNR，绘出信号波形。(Write a MATLAB program, "10" discussed in the _0=5 * ^ (- 5) and Gauss white noise environment, using the matching detection filter amplitude is 2, the width of 1ms square wave signal condition (considering the sampling time is Ts=0.1ms), measuring the matched filter input signal and output signal at the center of the optimum sampling at SNR, draw the signal waveform.)