A time-division (TD) decimation filter bank includes two decimation filter units. The first decimation filter unit operates at a system clock and receives a first-stage input data string. Each data in the first-stage input data string has a first part data and second part data. During the odd clock periods, the first part data are filtered and decimated in frequency. During the even clock periods, the second part data are filtered and decimated in frequency. The second decimation filter unit operates at the system clock and 2N clock periods are set as an operation-period unit, N≧2. The second decimation filter unit receives the outputs from the first decimation filter unit and receives several feedback data of the second decimation filter unit by TD, so that the received data are distributed into the 2N clock periods for filtering and decimation and outputting by TD.
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机译：时分（TD）抽取滤波器组包括两个抽取滤波器单元。第一抽取滤波器单元以系统时钟工作并接收第一级输入数据串。第一级输入数据串中的每个数据具有第一部分数据和第二部分数据。在奇数时钟周期内，对第一部分数据进行滤波和频率抽取。在偶数时钟周期内，对第二部分数据进行滤波和频率抽取。第二抽取滤波器单元以系统时钟进行操作，并且将2个 N个时钟周期设置为操作时段单元，N≥2。第二抽取滤波器单元接收来自第一抽取滤波器单元的输出，并通过TD接收第二抽取滤波器单元的多个反馈数据，从而将接收到的数据分配到2 N 个时钟周期中进行滤波。并由TD抽取和输出。
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