公开(公告)号：US20070194796A1

公开(公告)日：2007-08-23

申请号：US11700728

申请日：2007-01-30

申请人： Reid Harrison ,  Cynthia Furse ,  Chirag Sharma

发明人： Reid Harrison ,  Cynthia Furse ,  Chirag Sharma

IPC分类号： G01R31/11

CPC分类号： G01R31/088 ,  G01R31/008 ,  G01R31/11

摘要： A technique for reflectometry testing of a signal path is disclosed. The technique includes injecting a test signal based on a probe pseudo-noise sequence into the signal path and obtaining a response signal. A sliding reference pseudo-noise sequence is correlated against the response signal. Both the probe sequence and the reference sequence are generated at a chip rate. The correlation is obtained for integer chip time delays, and sub-chip resolution of a peak correlation delay is estimated from at least two samples of the correlation.

摘要翻译： 公开了一种用于信号路径的反射测试的技术。 该技术包括将基于探测伪噪声序列的测试信号注入信号路径并获得响应信号。 滑动参考伪噪声序列与响应信号相关。 探针序列和参考序列都以码片速率产生。 对于整数码片时间延迟获得相关性，并且从相关性的至少两个样本估计峰值相关延迟的子码片分辨率。

公开(公告)号：US20050008071A1

公开(公告)日：2005-01-13

申请号：US10615004

申请日：2003-07-08

申请人： Tamal Bose ,  Alan Shaw ,  Chirag Sharma ,  Ratchaneekorn Thamvichai

发明人： Tamal Bose ,  Alan Shaw ,  Chirag Sharma ,  Ratchaneekorn Thamvichai

IPC分类号： H03H17/02 ,  H03H17/04 ,  H03K5/159

CPC分类号： H03H17/0225 ,  H03H17/04

摘要： A multiplierless IIR filter incorporates power-of-two coefficients to perform shift operations to reduce space and increase speed. To optimize performance, a genetic algorithm generates the power-of-two coefficients. The filter architecture includes shift registers to receive input samples and previous outputs. A shifter stage is employed to perform shift operations for the input samples and previous outputs based on corresponding power-of-two coefficients. Products are added by parallelism and sequential pipelining to produce an output.

摘要翻译： 无乘法器IIR滤波器包含两个系数，用于执行移位操作以减少空间并提高速度。 为了优化性能，遗传算法生成二次幂系数。 滤波器架构包括移位寄存器以接收输入采样和以前的输出。 使用移位级基于相应的二次幂系数对输入样本和先前输出执行移位操作。 产品通过并行和顺序流水线添加以产生输出。

公开(公告)号：US07548071B2

公开(公告)日：2009-06-16

申请号：US11700728

申请日：2007-01-30

申请人： Reid Harrison ,  Cynthia Furse ,  Chirag Sharma

发明人： Reid Harrison ,  Cynthia Furse ,  Chirag Sharma

IPC分类号： G01R31/11 ,  G01R27/28 ,  G01R23/16

CPC分类号： G01R31/088 ,  G01R31/008 ,  G01R31/11

摘要： A technique for reflectometry testing of a signal path is disclosed. The technique includes injecting a test signal based on a probe pseudo-noise sequence into the signal path and obtaining a response signal. A sliding reference pseudo-noise sequence is correlated against the response signal. Both the probe sequence and the reference sequence are generated at a chip rate. The correlation is obtained for integer chip time delays, and sub-chip resolution of a peak correlation delay is estimated from at least two samples of the correlation.

摘要翻译： 公开了一种用于信号路径的反射测试的技术。 该技术包括将基于探测伪噪声序列的测试信号注入信号路径并获得响应信号。 滑动参考伪噪声序列与响应信号相关。 探针序列和参考序列都以码片速率产生。 对于整数码片时间延迟获得相关性，并且从相关性的至少两个样本估计峰值相关延迟的子码片分辨率。