公开(公告)号：EP0562422B1

公开(公告)日：1998-01-21

申请号：EP93104294.9

申请日：1993-03-16

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H. ,  Lery, Scott A. ,  Fox, John M.

IPC分类号： H04L27/00

CPC分类号： H04L1/0059 ,  H04L1/0071 ,  H04L27/0012 ,  H04N5/211

公开(公告)号：EP0582827A3

公开(公告)日：1995-10-18

申请号：EP93110651.2

申请日：1993-07-03

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H. ,  Fox, John M. ,  Lery, Scott A.

IPC分类号： H03M13/22 ,  H03M13/12 ,  H04L7/04 ,  H03M13/00

CPC分类号： H03M13/2732 ,  H03M13/33

摘要： An interleaver (34) processes information in a pseudorandom order to provide pseudorandom interleaved data for communication to a deinterleaver (42). The pseudorandom interleaved data is processed at the deinterleaver (42) in a pseudorandom order corresponding to that used at the interleaver (34) means, to recover the original information. The pseudorandom processing at the deinterleaver is synchronized with the pseudorandom processing at the interleaver on a trial and error basis. In one embodiment, full synchronization occurs when a Viterbi decoder (44) receiving data from the deinterleaver has a renormalization rate within a designated threshold and when enough synchronization words are detected in data output from the deinterleaver to meet a predetermined criterion. In another embodiment, a timer is used to initiate a new starting address for the pseudorandom processing at the deinterleaver during successive time intervals. Synchronization is achieved when a start address is found that results in the detection of enough synchronization words in data output from the deinterleaver to meet a predetermined synchronization criterion.

摘要翻译： 交织器（34）以伪随机顺序处理信息以提供用于与解交织器（42）进行通信的伪随机交织数据。 在去交错器（42）以与交织器（34）装置上使用的伪随机顺序相对应的伪随机顺序处理伪随机交织的数据，以恢复原始信息。 解交织器上的伪随机处理与在交织器上的伪随机处理以试错法同步。 在一个实施例中，当从解交织器接收数据的维特比解码器（44）在指定阈值内具有重正化率并且当从解交织器输出的数据中检测到足够的同步字以满足预定标准时，发生完全同步。 在另一个实施例中，定时器用于在连续时间间隔期间在解交织器处启动用于伪随机处理的新起始地址。 当发现起始地址导致从解交织器输出的数据中检测足够的同步字以满足预定的同步标准时，实现同步。

公开(公告)号：EP0582827A2

公开(公告)日：1994-02-16

申请号：EP93110651.2

申请日：1993-07-03

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H. ,  Fox, John M. ,  Lery, Scott A.

IPC分类号： H03M13/22 ,  H03M13/12 ,  H04L7/04 ,  H03M13/00

CPC分类号： H03M13/2732 ,  H03M13/33

摘要： An interleaver (34) processes information in a pseudorandom order to provide pseudorandom interleaved data for communication to a deinterleaver (42). The pseudorandom interleaved data is processed at the deinterleaver (42) in a pseudorandom order corresponding to that used at the interleaver (34) means, to recover the original information. The pseudorandom processing at the deinterleaver is synchronized with the pseudorandom processing at the interleaver on a trial and error basis. In one embodiment, full synchronization occurs when a Viterbi decoder (44) receiving data from the deinterleaver has a renormalization rate within a designated threshold and when enough synchronization words are detected in data output from the deinterleaver to meet a predetermined criterion. In another embodiment, a timer is used to initiate a new starting address for the pseudorandom processing at the deinterleaver during successive time intervals. Synchronization is achieved when a start address is found that results in the detection of enough synchronization words in data output from the deinterleaver to meet a predetermined synchronization criterion.

摘要翻译： 交织器（34）以伪随机顺序处理信息以提供用于与解交织器（42）进行通信的伪随机交织数据。 在去交错器（42）以与交织器（34）装置上使用的伪随机顺序相对应的伪随机顺序处理伪随机交织的数据，以恢复原始信息。 解交织器上的伪随机处理与在交织器上的伪随机处理以试错法同步。 在一个实施例中，当从解交织器接收数据的维特比解码器（44）在指定阈值内具有重正化率并且当从解交织器输出的数据中检测到足够的同步字以满足预定标准时，发生完全同步。 在另一个实施例中，定时器用于在连续时间间隔期间在解交织器处启动用于伪随机处理的新起始地址。 当发现起始地址导致从解交织器输出的数据中检测足够的同步字以满足预定的同步标准时，实现同步。

公开(公告)号：EP0562422A1

公开(公告)日：1993-09-29

申请号：EP93104294.9

申请日：1993-03-16

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H. ,  Lery, Scott A. ,  Fox, John M.

IPC分类号： H04L27/00

CPC分类号： H04L1/0059 ,  H04L1/0071 ,  H04L27/0012 ,  H04N5/211

摘要： A quadrature amplitude modulation (QAM) communication system is provided in which data can be communicated in any one of a plurality of QAM modes, such as 16-QAM, 32-QAM, and 64-QAM (30). A receiver (70) detects the particular QAM mode transmitted on a trial and error basis, by attempting to decode the received data using different QAM modes until a synchronization condition is detected. The synchronization condition can require that a plurality of different synchronization tests be met. In a specific embodiment, a first synchronization test is met when a renormalization rate of a trellis decoder (90) is below a threshold value. A second synchronization test is met when a first synchronization word is detected in the received data. A third and final synchronization test is met when a second synchronization word is detected in the received data. In order to reduce the cost of the receiver, most of the QAM mode dependent components (76, 80, 84, 90, 98, 102) are implemented using look-up tables stored in PROMs.

摘要翻译： 提供了一种正交幅度调制（QAM）通信系统，其中数据可以以诸如16-QAM，32-QAM和64-QAM（30）的多个QAM模式中的任何一个传送。 接收机（70）通过尝试使用不同的QAM模式对接收到的数据进行解码直到检测到同步状态来检测基于试错法传输的特定QAM模式。 同步条件可以要求满足多个不同的同步测试。 在具体实施例中，当网格解码器（90）的重正化率低于阈值时，满足第一同步测试。 当在所接收的数据中检测到第一同步字时，满足第二同步测试。 当在所接收的数据中检测到第二同步字时，满足第三次和最后的同步测试。 为了降低接收机的成本，使用存储在PROM中的查找表来实现大多数QAM模式相关组件（76,80,84,90,98,102）。