公开(公告)号：EP0741472A3

公开(公告)日：2000-06-07

申请号：EP96106338.5

申请日：1996-04-23

申请人： NOKIA TECHNOLOGY GmbH

发明人： Välimäki, Vesa ,  Laakso, Timo ,  Henriksson, Jukka

IPC分类号： H04L7/02 ,  H03H17/06

CPC分类号： H04N21/4382 ,  H03H17/028 ,  H04L7/0029 ,  H04L7/0062 ,  H04L7/0274 ,  H04L27/2273 ,  H04L2027/0028 ,  H04L2027/0057 ,  H04N21/2383

摘要： The invention is related to a method and circuit arrangement for processing a received signal in a variable symbol rate system, such as a digital television system. In the method and arrangement according to the system, a received signal is sampled at a fixed sampling frequency (f f ) that is higher than the symbol frequency of any one of the received signals. The resulting sample sequence is converted to another sample sequence the sampling frequency of which equals the symbol frequency (f i ) of the received signal or its integer multiple. Then the samples are filtered (8) and signal value decisions are made (9) for the filtered samples. Conversion of the sampling frequency is advantageously performed using a so-called modified Farrow-type fractional delay filter (6) which is controlled using a control signal proportional to the delay of each sample. Using the method and arrangement according to the invention it is possible to process received signals the symbol frequencies of which are arbitrary within set limits.

公开(公告)号：EP0741472A2

公开(公告)日：1996-11-06

申请号：EP96106338.5

申请日：1996-04-23

申请人： NOKIA TECHNOLOGY GmbH

发明人： Välimäki, Vesa ,  Laakso, Timo ,  Henriksson, Jukka

IPC分类号： H04L7/02 ,  H03H17/06

CPC分类号： H04N21/4382 ,  H03H17/028 ,  H04L7/0029 ,  H04L7/0062 ,  H04L7/0274 ,  H04L27/2273 ,  H04L2027/0028 ,  H04L2027/0057 ,  H04N21/2383

摘要： The invention is related to a method and circuit arrangement for processing a received signal in a variable symbol rate system, such as a digital television system. In the method and arrangement according to the system, a received signal is sampled at a fixed sampling frequency (f f ) that is higher than the symbol frequency of any one of the received signals. The resulting sample sequence is converted to another sample sequence the sampling frequency of which equals the symbol frequency (f i ) of the received signal or its integer multiple. Then the samples are filtered (8) and signal value decisions are made (9) for the filtered samples. Conversion of the sampling frequency is advantageously performed using a so-called modified Farrow-type fractional delay filter (6) which is controlled using a control signal proportional to the delay of each sample. Using the method and arrangement according to the invention it is possible to process received signals the symbol frequencies of which are arbitrary within set limits.

摘要翻译： 本发明涉及用于处理诸如数字电视系统的可变符号率系统中的接收信号的方法和电路装置。 在根据该系统的方法和装置中，以比接收信号中的任何一个的符号频率高的固定采样频率（ff）对接收信号进行采样。 所得到的采样序列被转换为其采样频率等于接收信号的符号频率（fi）或其整数倍的另一采样序列。 然后对样本进行滤波（8），并对滤波后的样本进行信号值决定（9）。 使用所谓的修改的Farrow型分数延迟滤波器（6）有利地进行采样频率的转换，其使用与每个样本的延迟成比例的控制信号来控制。 使用根据本发明的方法和装置，可以处理其设定限制内的符号频率是任意的接收信号。