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代码说明：

说明：  这是基本Matlab的仿真原码，功能是验证无码间干扰的条件，包含了滚降滤波，参杂噪声，衰减，和眼图。(This is substantially the Matlab simulation original code, the function is to verify the absence of inter-symbol interference conditions, contains a rolloff filter, mixed noise, attenuation, and eye diagram.)