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1.发明专利
公开(公告)号：JP2003258751A
公开(公告)日：2003-09-12
申请号：JP2002368096
申请日：2002-12-19
Applicant: ST MICROELECTRONICS INC
Inventor： WANG XIANBIN
Abstract: PROBLEM TO BE SOLVED: To provide technology for improving the performance of DSL modems. SOLUTION: A DSL duplexing ratio for a new communication is selected according to the communications needs of an application. Namely, a required upstream and downstream bit rate for application communications is determined. From the ratio of these bit rates, a desired duplexing ratio is calculated. Next, the operation of the modem is adapted to choose a duplexing ratio that approximates the desired duplexing ratio for the application. To optimize modem operation, the size and position of the upstream and downstream bandwidths used for transmission are selected when the bit rate necessary for making the transmission is less than the total available bandwidth provided by the chosen duplexing ratio. COPYRIGHT: (C)2003,JPO
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2.发明专利
公开(公告)号：JP2003258765A
公开(公告)日：2003-09-12
申请号：JP2002368136
申请日：2002-12-19
Applicant: ST MICROELECTRONICS INC
Inventor： WANG XIANBIN
Abstract: PROBLEM TO BE SOLVED: To provide technology for optimizing the performance of DSL modems. SOLUTION: To optimize the performance of DSL modems in the same cable bundle, the size and position of the bandwidth used for transmission is selected when the bit rate necessary for making the transmission is less than the total available band width. By selecting a minimum number of subcarriers for Digital Multi-tone (DMT) signal transmission, a reduction in line driver power consumption is effectuated. Additionally, by selecting the position of the used bandwidth within the total available bandwidth, near-end crosstalk (NEXT) noise within the cable bundle may be minimized. COPYRIGHT: (C)2003,JPO
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