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    MULTI-BRANCH DOWN CONVERTING FRACTIONAL RATE CHANGE FILTER
    1.
    发明公开
    MULTI-BRANCH DOWN CONVERTING FRACTIONAL RATE CHANGE FILTER 审中-公开
    美孚VERZWEIGTERABWÄRTSUMWANDLUNGSFILTERMIT NICHTGANZZAHLIGERRATENÄNDERUNG

    公开(公告)号：EP3055928A1

    公开(公告)日：2016-08-17

    申请号：EP14781669.8

    申请日：2014-07-25

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： HIND, Joleen ,  LAPORTE, Pierre-Andre

    IPC分类号： H03H17/02 ,  H03H17/06

    CPC分类号： H04L25/0262 ,  H03H17/0275 ,  H03H17/0416 ,  H03H17/0621 ,  H03H17/0685 ,  H03H2220/06

    摘要： A method of filtering an input sample stream having a downsampling rate is disclosed to generate an output sample stream having an upsampling rate that is less than the downsampling rate. The input sample stream is input to a rate change filter having multiple filter branches. The input sample stream is filtered at each of the multiple filter branches to output filtered sample substreams. Each of the multiple filter branches have filter coefficients corresponding to a different phase of the filter response. The filtered sample substreams are stored in a memory and the stored filtered sample substreams are combined to generate the output sample stream.

    摘要翻译： 公开了一种对具有下采样率的输入采样流进行滤波的方法，以产生具有小于下采样率的上采样率的输出采样流。 输入采样流被输入到具有多个滤波器分支的速率变化滤波器。 输入样本流在多个滤波器分支中的每一个处进行滤波以输出滤波后的样本子流。 多个滤波器分支中的每一个具有对应于滤波器响应的不同相位的滤波器系数。 将经过滤的样本子流存储在存储器中，并且存储的过滤样本子流被组合以产生输出样本流。