公开(公告)号：US06628667B1

公开(公告)日：2003-09-30

申请号：US09230483

申请日：1999-01-26

申请人： Hideshi Murai ,  Hisao Tachika

发明人： Hideshi Murai ,  Hisao Tachika

IPC分类号： H04J316

CPC分类号： H04J13/12 ,  H04J13/0048

摘要： Described is a variable rate transmission apparatus for spread modulating data signals by using spread code sequences and transmitting the processed signals. The variable rate transmission apparatus spread modulates the data signals, upon the condition that the transmission rate of each data signal is greater than or equal to a predetermined transmission rate, in a binary sequence using bi-orthogonal signals and transmits the processed signals.

摘要翻译： 描述了一种可变速率传输装置，用于通过使用扩展码序列扩展调制数据信号并发送处理的信号。 在使用双正交信号的二进制序列中，在每个数据信号的传输速率大于或等于预定传输速率的条件下，可变速率传输设备进行扩展调制，并发送处理的信号。

公开(公告)号：US6154487A

公开(公告)日：2000-11-28

申请号：US78580

申请日：1998-05-14

申请人： Hideshi Murai ,  Hisao Tachika

发明人： Hideshi Murai ,  Hisao Tachika

IPC分类号： H04B1/707 ,  H04B1/7075 ,  H04L7/00 ,  H04L27/30

CPC分类号： H04B1/70775 ,  H04B1/70757 ,  H04B1/708 ,  H04B1/7095

摘要： A spread-spectrum signal receiving method and apparatus in which a correlation operation is performed for obtaining a correlation between a base-band component of a received spread-spectrum signal and a spread code, so as to demodulate the received signal. In the method, a correlation operation between the spread code and the base-band component, and a correlation operation at a timing equal to a timing difference between the spread code and the base-band component in the former correlation operation step, the timing difference being 1/2 of a spread-code interval, are performed. Then, based on results obtained in these correlation operations, a correlation operation result at the timing point where a timing difference between the spread code and the base-band component is less than 1/2 of the spread-code interval, is estimated.

摘要翻译： 一种扩频信号接收方法和装置，其中执行相关操作以获得接收扩频信号的基带分量与扩展码之间的相关性，以解调接收信号。 在该方法中，在前述相关运算步骤中，扩频码与基带分量之间的相关运算以及等于扩频码与基带分量之间的定时差的定时的相关运算， 被执行为+ E，fra 1/2 + EE的扩展码间隔。 然后，基于这些相关运算中得到的结果，扩频码与基带分量之间的定时差小于+ E的定时点的相关运算结果，扩展码的1/2 + EE 间隔，估计。

公开(公告)号：US5020075A

公开(公告)日：1991-05-28

申请号：US402882

申请日：1989-09-05

申请人： Hisao Tachika

发明人： Hisao Tachika

IPC分类号： H04J13/00 ,  H04B1/707 ,  H04L27/10 ,  H04L27/20

CPC分类号： H04L27/2007 ,  H04B1/707

摘要： In a direct sequence spread spectrum modulation apparatus, the data of predetermined bit inserted in a phase shift time data period provided between the respective PN codes, or a predetermined bit at the latter half portion of the PN code, is phase shifted in accordance with the data to be modulated. The thereby conducts spread spectrum and data modulation.