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61. 发明授权

US07233268B1 Multi-stage sample rate converter 失效
标题翻译：多级采样率转换器
公开(公告)号：US07233268B1
公开(公告)日：2007-06-19
申请号：US11422071
申请日：2006-06-03
申请人： Lekun Lin , Sheng Lin
发明人： Lekun Lin , Sheng Lin
IPC分类号： H03M7/00
CPC分类号： H03H17/0621 , H03H17/0685
摘要： Architectures of multi-stage sample rate converters are disclosed. According to one aspect of the present invention, a received signal with a higher sampling rate is converted to a lower sampling rate. To prevent aliasing in the resultant signal, an anti-aliasing filter is introduced. The passband of the anti-aliasing filter is so adjusted according to the conversation rate of a sample rate converter. To keep the implementation relatively simple, the coefficients of the filter are kept constant. Therefore, the conversation rate of a sample rate converter is constrained in a limited range, thus requiring only a constant anti-aliasing filter. A series of halfband filters are then used to convert the signal to a desired sampling rate.
摘要翻译：公开了多级采样率转换器的架构。根据本发明的一个方面，具有较高采样率的接收信号被转换成较低的采样率。为了防止所得信号中的混叠，引入了抗混叠滤波器。抗混叠滤波器的通带根据采样率转换器的通话速率进行调整。为了保持相对简单的实现，滤波器的系数保持不变。因此，采样率转换器的通话速率被限制在有限的范围内，因此仅需要恒定的抗混叠滤波器。然后使用一系列半带滤波器将信号转换成所需的采样率。

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