公开(公告)号：US20120026901A1

公开(公告)日：2012-02-02

申请号：US12912878

申请日：2010-10-27

申请人： Xingxin Gao ,  David P. Varodayan

发明人： Xingxin Gao ,  David P. Varodayan

IPC分类号： H04L12/26

CPC分类号： H04B1/7073 ,  G01S19/30

摘要： Incoming signals that are sparse in the code-correlation domain, such as CDMA signal (GPS signals being a specific example of such signals) are processed by sampling the incoming signal at irregular time intervals at an average rate that is significantly lower than the Nyquist rate; which in the case of GPS signals is the chip rate of a pseudorandom code sequence that is embedded in the signal. The sampled signal is processed with locally generated signals that are also sampled the same irregular time intervals.

摘要翻译： 在码相关领域中稀疏的输入信号，例如CDMA信号（GPS信号是这种信号的一个具体例子），通过以不小于Nyquist频率的平均速率以不规则的时间间隔对输入信号进行采样来处理 ; 在GPS信号的情况下，嵌入在信号中的伪随机码序列的码片速率。 采样信号用本地生成的信号进行处理，该信号也采用相同的不规则时间间隔进行采样。

公开(公告)号：US08467347B2

公开(公告)日：2013-06-18

申请号：US12912878

申请日：2010-10-27

申请人： Xingxin Gao ,  David P Varodayan

发明人： Xingxin Gao ,  David P Varodayan

IPC分类号： H04W4/00 ,  H04J1/00 ,  H04J3/00 ,  H04B1/709

CPC分类号： H04B1/7073 ,  G01S19/30

摘要： Incoming signals that are sparse in the code-correlation domain, such as CDMA signal (GPS signals being a specific example of such signals) are processed by sampling the incoming signal at irregular time intervals at an average rate that is significantly lower than the Nyquist rate; which in the case of GPS signals is the chip rate of a pseudorandom code sequence that is embedded in the signal. The sampled signal is processed with locally generated signals that are also sampled the same irregular time intervals.

摘要翻译： 在码相关领域中稀疏的输入信号，例如CDMA信号（GPS信号是这种信号的一个具体例子），通过以不小于Nyquist频率的平均速率以不规则的时间间隔对输入信号进行采样来处理 ; 在GPS信号的情况下，嵌入在信号中的伪随机码序列的码片速率。 采样信号用本地生成的信号进行处理，该信号也采用相同的不规则时间间隔进行采样。

公开(公告)号：US20090055651A1

公开(公告)日：2009-02-26

申请号：US12196643

申请日：2008-08-22

申请人： Bernd Girod ,  Yao-Chung Lin ,  David P. Varodayan

发明人： Bernd Girod ,  Yao-Chung Lin ,  David P. Varodayan

IPC分类号： H04L9/00

CPC分类号： G11B20/00086 ,  G11B20/00123 ,  G11B20/00173 ,  G11B20/0021

摘要： Media authentication is facilitated. In connection with an example embodiment, media is authenticated using an encoded projection of the media that is decoded using the media as an input. A condition of authenticity of the media is determined based upon an indication of distortion of the media characterized by a decoding of the encoded projection.

摘要翻译： 媒体认证便利。 结合示例实施例，使用使用媒体作为输入解码的媒体的编码投影来对媒体进行认证。 基于通过编码投影的解码表征的媒体的失真的指示来确定媒体的真实性的条件。