公开(公告)号：US06807229B1

公开(公告)日：2004-10-19

申请号：US09417690

申请日：1999-10-13

申请人： Eung-sun Kim ,  Kyu-min Kang ,  Gi-hong Im

发明人： Eung-sun Kim ,  Kyu-min Kang ,  Gi-hong Im

IPC分类号： H03H730

CPC分类号： H04L25/03057

摘要： A decision feedback equalizer and a method for updating tap coefficients of the decision feedback equalizer are provided. The decision feedback equalizer (DFE) includes a first equalizer for reducing channel interference noise in an input signal, a second equalizer for generating a feedback signal for reducing remaining interference noise, and an update controller for controlling the first and the second equalizers so as to freeze the second equalizer when the first equalizer is updated and to freeze the first equalizer when the second equalizer is updated. The tap coefficients of the feedforward equalizer and the feedback equalizer are alternately initialized. It then becomes possible to stably converge the levels of respective tap coefficients without diverging them and to reduce the power used for updating the tap coefficients in a steady state.

摘要翻译： 提供了一种决策反馈均衡器和用于更新决策反馈均衡器的抽头系数的方法。 判决反馈均衡器（DFE）包括用于减少输入信号中的信道干扰噪声的第一均衡器，用于产生用于减少剩余干扰噪声的反馈信号的第二均衡器，以及用于控制第一和第二均衡器的更新控制器，以便 当第一均衡器被更新时，冻结第二均衡器，并且当更新第二均衡器时冻结第一均衡器。 交流初始化前馈均衡器和反馈均衡器的抽头系数。 然后可以稳定地收敛各抽头系数的电平而不使它们发散，并且减小用于在稳定状态下更新抽头系数的功率。

公开(公告)号：US06654430B1

公开(公告)日：2003-11-25

申请号：US09417687

申请日：1999-10-13

申请人： Eung-sun Kim ,  Myeon-kyun Cho ,  Ki-ho Kim ,  Chong-dae Yim ,  Kyu-min Kang ,  Gi-hong Im

发明人： Eung-sun Kim ,  Myeon-kyun Cho ,  Ki-ho Kim ,  Chong-dae Yim ,  Kyu-min Kang ,  Gi-hong Im

IPC分类号： H03D104

CPC分类号： H04B1/1036

摘要： A digital subscriber line receiving apparatus having resilience to HAM radio interference noise and a method therefore includes an automatic gain controller for amplifying a received signal level to a signal level having a predetermined magnitude, a timing recoverer for recovering timing from a signal output from the automatic gain controller, an equalizer for removing interference noise from a signal received from the timing recoverer, a slicer for detecting a digital value from a signal received from the equalizer, an initialization controller for resetting the receiving apparatus and initializing the automatic gain controller, the timing recoverer, and the equalizer when the signal to noise ratio of the output signal of the equalizer is smaller than a reference signal to noise ratio, and an update controller for preventing automatic gain controller and equalizer from being initialized by the initialization controller when HAM radio interference noise is detected in the received signal.

摘要翻译： 一种具有HAM无线电干扰噪声的弹性的数字用户线路接收装置，其方法包括：一个自动增益控制器，用于将接收信号电平放大到具有预定幅度的信号电平;一个定时恢复器，用于从自动 增益控制器，用于从从定时恢复器接收的信号中去除干扰噪声的均衡器，用于从从均衡器接收的信号中检测数字值的限幅器，用于复位接收装置和初始化自动增益控制器的初始化控制器， 并且当均衡器的输出信号的信噪比小于参考信噪比时的均衡器，以及当HAM无线电干扰时用于防止自动增益控制器和均衡器被初始化控制器初始化的更新控制器 在接收到的符号中检测到噪声 al。