公开(公告)号：AU5029100A

公开(公告)日：2001-08-20

申请号：AU5029100

申请日：2000-05-19

Applicant: TELOGY NETWORKS INC

Inventor： MODLIN CORY S

IPC: H04L25/49 ,  H04B1/38 ,  H04L5/16

Abstract: For PCM upstream, the analog modem must transmit a filtered sequence of symbols so that the samples of the signal at the input to the codec at the central office (CO) are at a predetermined set of levels. This requires that the analog modem use an 8 kHz symbol rate synchronized to the co clock. Typical telephone channels have nulls at DC and at 4 kHz. Therefore, for best performance, the signal transmitted by the analog modem should be spectrally shaped to match the channel. The present invention utilizes a qeneralized Laroia-Tretter-Farvardin (LTF) precoder similar to the one used in V.34. This precoder structure allows spectral shaping and could also allow for constellation shaping gains. Using this precoder structure with spectral shaping has the potential to improve data rates by 3-3.5 kbps.

公开(公告)号：WO2005094511A2

公开(公告)日：2005-10-13

申请号：PCT/US2005009802

申请日：2005-03-24

Applicant: TELOGY NETWORKS INC ,  MODLIN CORY S

Inventor： MODLIN CORY S

IPC: H04B1/38 ,  H04L27/26 ,  H04M11/06

CPC classification number: H04M11/062 ,  H04L27/2601

Abstract: A method of constructing a valid set of configuration parameters for ADSL2 and ADSL2+ compliant systems includes selecting delays of a power of two ms, in which the ADSL2 or ADSL2+ compliant system may also possess a selected minimum noise protection value to produce maximum downstream and upstream net data rates corresponding to the selected delay and the selected minimum noise protection value.

Abstract translation: 为ADSL2和ADSL2 +兼容系统构建一组有效的配置参数的方法包括选择两ms功率的延迟，其中ADSL2或ADSL2 +兼容系统还可以具有选定的最小噪声保护值，以产生最大下游和上游网络 对应于选定延迟的数据速率和所选择的最小噪声保护值。

公开(公告)号：EP1741193A4

公开(公告)日：2011-10-19

申请号：EP05729397

申请日：2005-03-24

Applicant: TELOGY NETWORKS INC

Inventor： MODLIN CORY S

IPC: H04M11/06 ,  H04B1/38 ,  H04L27/26

CPC classification number: H04M11/062 ,  H04L27/2601

Abstract: A method of constructing a valid set of configuration parameters for ADSL2 and ADSL2+ compliant systems include selecting delays of a power of two ms, in which the ADSL2 or ADSL2+ compliant system may also possess a selected minimum noise protection value to produce maximum downstream and upstream net data rates corresponding to the selected delay and the selected minimum noise protection value.

Abstract translation: 为ADSL2和ADSL2 +兼容系统构建一组有效的配置参数的方法包括选择两ms功率的延迟，其中ADSL2或ADSL2 +兼容系统还可以具有选定的最小噪声保护值，以产生最大的下游和上行网络 对应于选定延迟的数据速率和所选择的最小噪声保护值。