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我调用函数DSPF_sp_fftSPxSP计算出来的结果与matlab计算的结果相比，幅度上存在倍数关系，但是DSPF_sp_fftSPxSP函数计算出来的结果的相位与matlab计算的结果的相位相比较是完全混乱的，请问可能是什么原因造成的呢？
