公开(公告)号：US07200192B2

公开(公告)日：2007-04-03

申请号：US10329864

申请日：2002-12-26

申请人： Lee-Fang Wei ,  Wen-Yih Hwang ,  Bor-Chin Wang ,  Yuh-Ren Jauh

发明人： Lee-Fang Wei ,  Wen-Yih Hwang ,  Bor-Chin Wang ,  Yuh-Ren Jauh

IPC分类号： H03D1/00 ,  H04B1/10 ,  H03K5/159 ,  H03M13/03

CPC分类号： H04L25/03267 ,  H04L23/02 ,  H04L25/03203 ,  H04L25/03337

摘要： An approach for decoding a substantially orthogonal code, such as a CCK code, based on its trellis diagram is provided. Compared to the conventional decoder based on codeword correlation, the unconventional decoder here has the advantage that it can work together with a decision feedback equalizer without suffering from the error propagation effect of the equalizer. In other words, the unconventional decoder makes joint decision feedback equalizer and decoder workable, which in turn enables reliable transmission of a signal encoded by a substantially orthogonal code over a multi-path channel.

摘要翻译： 提供了一种基于其网格图解码基本正交码（例如CCK码）的方法。 与基于码字相关性的常规解码器相比，这里的非常规解码器具有的优点是可以与判决反馈均衡器一起工作，而不会受到均衡器的误差传播效应的影响。 换句话说，非常规解码器使联合决策反馈均衡器和解码器可行，这又使得能够在多路径信道上可靠地传输由基本正交码编码的信号。

公开(公告)号：US06658445B1

公开(公告)日：2003-12-02

申请号：US09614116

申请日：2000-07-11

申请人： Yow-Ling Gau ,  Bor-Chin Wang ,  Ching-Chun Meng

发明人： Yow-Ling Gau ,  Bor-Chin Wang ,  Ching-Chun Meng

IPC分类号： G06F738

CPC分类号： G06F7/552 ,  G06F2207/5525

摘要： An apparatus and method for demodulating a square root of the sum of squares of two inputs I and Q in a digital signal processing are provided. The square root {square root over (I2+Q2)} is approximated by an equation aX +bY, wherein coefficients a and b are special binary numbers. Due to the numbers, the square root {square root over (I2+Q2)} can be quickly computed by the operation of shifting and addition. A plurality of possible approximation values for the coefficients a and b are provided, as well as the use of a comparator to select the maximal one among the possible approximation values.

摘要翻译： 提供了一种用于在数字信号处理中解调两个输入I和Q的平方和的平方根的装置和方法。 平方根（平方根超过（I 2 + Q 2）}）近似为等式aX + bY，其中系数a和b是特殊的二进制数。 由于数字，可以通过移位和相加的操作快速计算平方根（平方根超过（I 2> + 2）}}。 提供了系数a和b的多个可能的近似值，以及使用比较器来选择可能的近似值中的最大值。