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软件无线电接收机的灵活性之一是在于对调制方式没有限制。为此,不同采样率之间的转换对软件无线电终端来说就显得尤为重要。实现数字的采样率转换在传统方法中就是利用插值,而一般的传统方法不能满足反混叠效应的要求。给出了在采样率转换(SRC)中的一种改进级联积分梳齿(CIC)滤波器,从而更有效地避免了混叠效应。
One of the flexibility of software radio receivers is that there is no limit to the modulation method. For this reason, the conversion between different sampling rates is especially important for software radio terminals. The realization of digital sampling rate conversion in the traditional method is the use of interpolation, while the traditional method can not meet the anti-aliasing effect of the general requirements. An improved cascaded integral comb (CIC) filter in sample rate conversion (SRC) is given, which avoids the aliasing effect more effectively.