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    • 6. 发明授权
    • Systems, methods and computer program products for identifying digital impairments in modem signals
    • 用于识别调制解调器信号数字损伤的系统,方法和计算机程序产品
    • US06650657B1
    • 2003-11-18
    • US09429859
    • 1999-10-29
    • Youssef AbdelilahGordon Taylor DavisAjay DholakiaDongming HwangFredy D. NeeserMalcolm Scott WareHua Ye
    • Youssef AbdelilahGordon Taylor DavisAjay DholakiaDongming HwangFredy D. NeeserMalcolm Scott WareHua Ye
    • H04J324
    • H04J3/125
    • Robbed Bit Signaling (RBS) and PAD digital impairments in sets of Digital Impairment Learning (DIL) signals that are repeatedly transmitted from a server modem to a client modem during DIL intervals are identified by identifying a PAD level for the sets of DIL signals in the DIL intervals and then identifying an RBS type for individual sets of DIL signals based upon the PAD levels so identified. The PAD level may be identified using model DIL signals that correspond to PAD levels that are not subject to RBS. The RBS type may be identified using model DIL signals that correspond to multiple RBS types that are subject to the identified PAD level. More specifically, one of the DIL intervals that contains DIL signals that are not subject to RBS is identified. A PAD level for the DIL signals in the one of the DIL intervals so identified then is determined. The PAD level that was determined is applied to the DIL signals in remaining ones of the DIL intervals, to identify an RBS for the DIL signals in the remaining ones of the DIL intervals.
    • 通过在DIL间隔期间从服务器调制解调器重复发送到客户端调制解调器的数字损伤学习(DIL)信号中的Robbed位信令(RBS)和PAD数字损伤被识别为DIL信号组中的PAD电平 DIL间隔,然后基于所识别的PAD水平识别用于各组DIL信号的RBS类型。 可以使用对应于不受RBS的PAD电平的模型DIL信号来识别PAD电平。 可以使用对应于经受所识别的PAD电平的多个RBS类型的模型DIL信号来识别RBS类型。 更具体地,识别包含不受RBS的DIL信号的DIL间隔之一。 确定如此识别的DIL间隔之一中的DIL信号的PAD电平。 将确定的PAD电平应用于DIL间隔中剩余的DIL信号,以识别DIL间隔中剩余的DIL信号中的DBS信号的RBS。