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1. 发明授权

US06373906B1 Method and apparatus for Viterbi detection of generalized partial response signals including two-way add/compare/select for improved channel speed 有权
标题翻译：用于维特比检测广义部分响应信号的方法和装置，包括双向加法/比较/选择以提高通道速度
公开(公告)号：US06373906B1
公开(公告)日：2002-04-16
申请号：US09768802
申请日：2001-01-24
申请人： Roy Daron Cideciyan , Jonathan Darrel Coker , Evangelos S. Eleftheriou , Richard Leo Galbraith , Allen Prescott Haar , Frank Ray Keyser, III , David James Stanek
发明人： Roy Daron Cideciyan , Jonathan Darrel Coker , Evangelos S. Eleftheriou , Richard Leo Galbraith , Allen Prescott Haar , Frank Ray Keyser, III , David James Stanek
IPC分类号： H04L2706
CPC分类号： H04L1/0054 , H04L25/497
摘要： Apparatus is provided for implementing high-speed and area efficient architectures for Viterbi detection of generalized partial response signals including two-way add/compare/select for improved channel speed. The two-way add/compare/select includes a two-way compare for comparing first and second state metric input values and a pair of two-way adds in parallel with the two-way compare for respectively adding the first and second state metric input values with a second input value. The second input value includes a time varying term or a constant term. The time varying terms are expressed as outputs Zn of a partial matched filter or as outputs Wn of a matched filter. A multiplexer is coupled to the pair of two-way adds, the multiplexer receiving a selectable input controlled by the two-way compare. A pair of shifts coupled between the pair of two-way adds and the multiplexer receive a shift control input for providing metric bounding to avoid underflow. The two-way compare for comparing first and second state metric input values can include a hard shift for providing an add for the first state metric input value and then a compare between a resultant first state metric input value and the second state metric input value.
摘要翻译：提供了用于实现用于维特比检测广义部分响应信号的高速和区域高效架构的装置，包括用于改善信道速度的双向加法/比较/选择。双向加法/比较/选择包括用于比较第一和第二状态度量输入值的双向比较以及用于分别添加第一和第二状态度量输入的双向比较并行的一对双向加法具有第二个输入值的值。第二输入值包括时变项或常数项。时变项表示为部分匹配滤波器的输出Zn或匹配滤波器的输出Wn。多路复用器耦合到一对双向加法器，多路复用器接收由双向比较控制的可选输入。耦合在一对双向加法器和多路复用器之间的一对移位器接收用于提供度量限制以避免下溢的移位控制输入。用于比较第一和第二状态度量输入值的双向比较可以包括用于为第一状态度量输入值提供加法，然后在得到的第一状态度量输入值与第二状态度量输入值之间进行比较的硬移位。

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