公开(公告)号：US5495509A

公开(公告)日：1996-02-27

申请号：US216746

申请日：1994-03-23

申请人： Alan E. Lundquist ,  John W. Zscheile, Jr. ,  Samuel C. Kingston

发明人： Alan E. Lundquist ,  John W. Zscheile, Jr. ,  Samuel C. Kingston

IPC分类号： H04B1/708 ,  H04B1/7085 ,  H04L7/00 ,  H04B1/707 ,  H04J3/06

CPC分类号： H04B1/708 ,  H04B1/7085

摘要： Apparatus for rapidly acquiring a high performance gain long PN code having a preamble header in real time includes appratus for rapid acquiring and tracking a short PN code in said preamble header and further includes apparatus for demodulating and tracking a long PN code which follows said preamble header. After acquiring the short PN code, the short PN replica code is applied to the long code demodulation and tracking apparatus. The short PN code is employed to synchronize the long code demodulation and tracking apparatus by detecting the time of occurrence of a sync word in said preamble header and is employed to generate a switch point signal and switch from a short PN replica code to a long PN replica code at the input to the long code demodulation and tracking device in real time.

摘要翻译： 用于快速获取具有前导码头的高性能增益长PN码的设备包括用于在所述前同步码报头中快速获取和跟踪短PN码的装置，并且还包括用于解调和跟踪跟随所述前同步头的长PN码的装置 。 在获取短PN码之后，将短PN复制码应用于长码解调和跟踪装置。 短PN码用于通过检测所述前同步码报头中同步字的出现时间来同步长码解调和跟踪装置，并用于产生切换点信号并从短PN复制码切换到长PN 复制代码在输入到长码解调和跟踪设备的实时。

公开(公告)号：US4890297A

公开(公告)日：1989-12-26

申请号：US259660

申请日：1988-10-19

申请人： John W. Zscheile, Jr. ,  Alan E. Lundquist ,  Billie M. Spencer

发明人： John W. Zscheile, Jr. ,  Alan E. Lundquist ,  Billie M. Spencer

IPC分类号： H04B1/707 ,  H04K3/00

CPC分类号： H04K3/228 ,  H04B1/707

摘要： The present invention provides a novel burst erasing automatic gain control circuit which includes the basic elements of an automatic gain control circuit and further includes in the loop control circuit, slow response wideband filter means, and a hard limiter which limits the AGC'ed output from the amplifier so that the signal reaching the slow response wideband filter means never exceeds a predetermined value which would cause distortion in the feedback loop. The output of the novel automatic gain control circuit is coupled to a despreading circuit which removes substantially all of the remaining burst jamming signals.

摘要翻译： 本发明提供了一种新颖的脉冲串擦除自动增益控制电路，其包括自动增益控制电路的基本元件，并且还包括在环路控制电路，慢响应宽带滤波器装置和限制AGC的输出的硬限幅器 使得到达慢响应宽带滤波器的信号意味着从不超过将导致反馈回路中的失真的预定值。 新颖的自动增益控制电路的输出耦合到解扩电路，其去除了基本上所有剩余的突发干扰信号。