公开(公告)号：EP0748056A3

公开(公告)日：1997-07-02

申请号：EP96304168.6

申请日：1996-06-06

申请人： DISCOVISION ASSOCIATES

发明人： Claydon, Anthony Peter John ,  Thomas, Richard James ,  Gammack, Richard John ,  Foxcroft, Thomas ,  Robbins, William Philip ,  Kuligowski, Andrew Peter ,  MacFarlane, Charles Dunlop

IPC分类号： H03M13/00

CPC分类号： H04L1/0065 ,  H03M13/23 ,  H03M13/41 ,  H03M13/4169 ,  H03M13/6362 ,  H03M13/6502 ,  H04L1/0009 ,  H04L1/0054 ,  H04L1/0068 ,  H04L1/0071

摘要： The invention provides a decoder of symbols of received data, the data being encoded according to a convolutional encoding scheme and transmitted through a communications channel. The data is punctuated according to a puncturing matrix, and has a plurality of state values which describe a sequence of state transitions. The decoder has a generation unit that accepts the received data for calculating metrics of the transitions thereof. A selector responsive to the generation unit selects a path of transitions corresponding to the path produced by a transmitter of the data stream. A traceback unit maintains historical information representative of sequential decision operations of the selector. A counter is provided for counting illegal state transitions of the path selected by the selector, and a control unit, responsive to the counter, determines a puncture rate and adjusts a puncture phase of the received data. The decoder can be used in a VLSl receiver circuit which is adapted to the reception of QPSK modulated data.

公开(公告)号：EP0748056A2

公开(公告)日：1996-12-11

申请号：EP96304168.6

申请日：1996-06-06

申请人： DISCOVISION ASSOCIATES

发明人： Claydon, Anthony Peter John ,  Thomas, Richard James ,  Gammack, Richard John ,  Foxcroft, Thomas ,  Robbins, William Philip ,  Kuligowski, Andrew Peter ,  MacFarlane, Charles Dunlop

IPC分类号： H03M13/00

CPC分类号： H04L1/0065 ,  H03M13/23 ,  H03M13/41 ,  H03M13/4169 ,  H03M13/6362 ,  H03M13/6502 ,  H04L1/0009 ,  H04L1/0054 ,  H04L1/0068 ,  H04L1/0071

摘要： The invention provides a decoder of symbols of received data, the data being encoded according to a convolutional encoding scheme and transmitted through a communications channel. The data is punctuated according to a puncturing matrix, and has a plurality of state values which describe a sequence of state transitions. The decoder has a generation unit that accepts the received data for calculating metrics of the transitions thereof. A selector responsive to the generation unit selects a path of transitions corresponding to the path produced by a transmitter of the data stream. A traceback unit maintains historical information representative of sequential decision operations of the selector. A counter is provided for counting illegal state transitions of the path selected by the selector, and a control unit, responsive to the counter, determines a puncture rate and adjusts a puncture phase of the received data. The decoder can be used in a VLSl receiver circuit which is adapted to the reception of QPSK modulated data.

摘要翻译： 本发明提供了一种接收数据符号的解码器，该数据根据卷积编码方案进行编码，并通过通信信道传输。 根据打孔矩阵对数据进行标点，并具有描述状态转换序列的多个状态值。 解码器具有接收用于计算其转换的度量的接收数据的生成单元。 响应于生成单元的选择器选择与由数据流的发送器产生的路径相对应的转换路径。 追溯单元维护表示选择器的顺序决定操作的历史信息。 提供了一个计数器，用于计数由选择器选择的路径的非法状态转换，并且响应于该计数器的控制单元确定穿孔率并调整接收数据的穿孔阶段。 解码器可以用于适合于接收QPSK调制数据的VLS1接收机电路中。