公开(公告)号：US6011788A

公开(公告)日：2000-01-04

申请号：US987815

申请日：1997-12-10

申请人： Michael Hurst ,  Johnny Harris ,  Dan M. Griffin ,  Lee Butterfield ,  Thomas R. Giallorenzi ,  Kyle L. Henderson

发明人： Michael Hurst ,  Johnny Harris ,  Dan M. Griffin ,  Lee Butterfield ,  Thomas R. Giallorenzi ,  Kyle L. Henderson

IPC分类号： H04B7/26 ,  H04L7/08 ,  H04W56/00 ,  H04B7/216

CPC分类号： H04W56/0015

摘要： A method is disclosed for operating a synchronous Code Division Multiple Access (S-CDMA) radio frequency communication system having a host transceiver unit and a plurality of user transceiver units. The method includes an initial step of defining a super-frame to be comprised of N sequential frames of data. In the preferred embodiment N is equal to three. For a user transceiver unit that obtains access to the host transceiver unit a next step of the method receives frames of data transmitted by the host transceiver unit and initially aligns a receiver timing and a transmitter timing of the user transceiver unit to a super-frame boundary of the received frames. A next step transmits frames of data from the user transceiver unit to the host transceiver unit using the initial timing alignment. A further step of the method detects at the host transceiver unit a difference between the arrival of the transmitted frames of data and a super-frame boundary and then transmits a timing correction parameter, preferably expressed in symbols, from the host transceiver unit to the user transceiver unit in order to align the transmitted frames of data to the super-frame boundary.

摘要翻译： 公开了一种用于操作具有主机收发器单元和多个用户收发器单元的同步码分多址（S-CDMA）射频通信系统的方法。 该方法包括定义由N个连续数据帧组成的超帧的初始步骤。 在优选实施例中，N等于3。 对于获得对主收发器单元的访问的用户收发器单元，该方法的下一步骤接收主机收发器单元发送的数据帧，并且最初将用户收发器单元的接收机定时和发送器定时对齐到超帧边界 的接收帧。 下一步骤将使用初始定时对准将数据帧从用户收发器单元发送到主机收发器单元。 该方法的另一步骤在主机收发器单元处检测所发送的数据帧的到达与超帧边界之间的差异，然后将来自主收发器单元的优选地以符号表示的定时校正参数发送到用户 收发器单元，以便将发送的数据帧对齐到超帧边界。

公开(公告)号：USRE28842E

公开(公告)日：1976-06-08

申请号：US489589

申请日：1974-07-18

申请人： Ted Lee Butterfield

发明人： Ted Lee Butterfield

IPC分类号： F16K17/04 ,  F16K17/08

CPC分类号： F16K17/0433 ,  F16K17/082 ,  Y10T137/7739

摘要： An unloader type valve for spray guns supplied from pumps to limit operating pressures of the pump when the spray gun is stopped. The valve utilizes an adjustable spring to select pressure forces for opening the valve and a variable flow passage from the valve to an outlet when the valve is open, the allowing matching of the valve to the precise operating pressures and flow rates in spray gun and pumping system installations.UNLOADER VALVE FOR SPRAY GUNS