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1. 发明授权

US6005854A Synchronous wireless access protocol method and apparatus 失效
标题翻译：同步无线接入协议方法和装置
公开(公告)号：US6005854A
公开(公告)日：1999-12-21
申请号：US908914
申请日：1997-08-08
申请人： Guanghan Xu , Yucong Gu , Wei Chen , Ying Chen , Peiwei Wang , Shihe Li
发明人： Guanghan Xu , Yucong Gu , Wei Chen , Ying Chen , Peiwei Wang , Shihe Li
IPC分类号： H04B7/26 , H04J13/00 , H04W28/06 , H04W56/00
CPC分类号： H04W28/06 , H04B7/2668 , H04J13/00 , H04W56/00
摘要： A wireless communication system has a protocol enabling synchronous code division multiple access (CDMA) communication on a time division duplex (TDD) frequency, and provides for a smart antenna system as an integral component of the system. The protocol has downlink time slots (DTS) which provide for synchronization and paging of all remote terminals from a base station on a omnidirectional code channel and while providing for traffic signals on directional traffic channels. The protocol has uplink time slots (DTS) which enable rapid link requests by remote terminals, as well as enabling improved spacial estimation, synchronization and power control of remote terminals by the base station.
摘要翻译：无线通信系统具有在时分双工（TDD）频率上实现同步码分多址（CDMA）通信的协议，并且将智能天线系统提供为系统的组成部分。该协议具有下行链路时隙（DTS），其提供来自全向码通道上的基站的所有远程终端的同步和寻呼以及在定向业务信道上提供业务信号。该协议具有上行链路时隙（DTS），能够实现远程终端的快速链路请求，并且能够实现基站对远程终端的改进的空间估计，同步和功率控制。

2. 发明授权

US06236839B1 Method and apparatus for calibrating a smart antenna array 失效
标题翻译：用于校准智能天线阵列的方法和装置
公开(公告)号：US06236839B1
公开(公告)日：2001-05-22
申请号：US09464933
申请日：1999-12-16
申请人： Yucong Gu , Shiping Li , Zhang Ping Yang
发明人： Yucong Gu , Shiping Li , Zhang Ping Yang
IPC分类号： H04Q720
CPC分类号： H01Q3/267 , H04W88/00
摘要： A smart antenna system includes: an antenna array including a plurality of antenna elements, and at least one calibration element; a plurality of transceiver units each having a port coupled with an associated one of the antenna elements, a receive port, and a transmit port; a transceiver calibration unit including a port coupled with the calibration element via a coaxial cable, a receive port, and a transmit port; and signal processing means communicatively coupled with each of the receive ports and the transmit ports of each of the transceiver units, and coupled with the calibration receive port and the calibration transmit port of the calibration unit. A transmitter calibration path associated with each antenna element extends from the transmit port of the associated transceiver unit to the associated antenna element, from the associated antenna element to the calibration element, and from the calibration element to the receive port of the calibration unit. A receiver calibration path associated with each antenna element extends from the transmit port of the calibration unit to the calibration element, from the calibration element to the associated antenna element, and from the associated antenna element to the receive port of the associated transceiver unit. The signal processing means is responsive to transmit mode resultant signals developed as a result of reference signals propagating through associated transmitter calibration paths. The signal processing means is also responsive to receive mode resultant signals developed as a result of reference signals propagating through associated receiver calibration paths.
摘要翻译：智能天线系统包括：包括多个天线元件的天线阵列和至少一个校准元件; 多个收发器单元，每个收发器单元具有与天线元件中的相关联的一个端口耦合的端口，接收端口和发送端口; 收发器校准单元，包括经由同轴电缆，接收端口和发送端口与校准元件耦合的端口; 以及信号处理装置，其通信地耦合到每个收发器单元的每个接收端口和发送端口，并与校准接收端口和校准单元的校准发送端口耦合。与每个天线元件相关联的发射器校准路径从相关联的收发器单元的发射端口延伸到相关联的天线元件，从相关联的天线元件到校准元件，以及从校准元件到校准单元的接收端口。与每个天线元件相关联的接收器校准路径从校准单元的发射端口延伸到校准元件，从校准元件到相关联的天线元件，以及从相关联的天线元件延伸到相关联的收发器单元的接收端口。信号处理装置响应于作为通过相关联的发射机校准路径传播的参考信号的结果而产生的发射模式结果信号。信号处理装置还响应于作为通过相关联的接收机校准路径传播的参考信号的结果而产生的接收模式结果信号。

3. 发明授权

US06226275B1 Wide band high power ultralinear RF transreceiver 有权
标题翻译：宽带大功率超线性射频收发器
公开(公告)号：US06226275B1
公开(公告)日：2001-05-01
申请号：US09383110
申请日：1999-08-25
申请人： Zhang Ping Yang , Shiping Li , Yucong Gu
发明人： Zhang Ping Yang , Shiping Li , Yucong Gu
IPC分类号： H04J300
CPC分类号： H04B1/44 , H04B1/56
摘要： A time division duplex switching circuit provides for selectively coupling signals between an antenna and a front stage transceiver circuit. The switching circuit is operative in a transmit mode and in a receive mode, and includes: a transmitter amplifier having an input and an output; a receiver amplifier having an input and an output; a first circulator including a first port coupled for communication with the front stage transceiver, a second port selectively coupled with the output of the receiver amplifier via a first switching, and a third port selectively coupled with the input of the transmitter amplifier via a second switching; and a second circulator including a first port coupled for communication via the antenna, a second port coupled with the input of the receiver amplifier, and a third port coupled with the output of the transmitter amplifier. The second switching is operative in the receive mode to connect the third port of the first circulator to a first load impedance for absorbing energy reflected from the front stage transceiver via the first circulator, and is operative in the transmit mode to connect the third port of the first circulator to the input of the transmitter amplifier. The first switching is operative in the transmit mode to connect the second port of the first circulator to a second load impedance for absorbing energy reflected from the input of the transmitter amplifier via the first circulator, and is operative in the receive mode to connect the second port of the first circulator to the output of the receiver amplifier.
摘要翻译：时分双工切换电路提供选择性地耦合在天线和前级收发器电路之间的信号。切换电路在发射模式和接收模式下工作，并且包括：具有输入和输出的发射机放大器; 具有输入和输出的接收机放大器; 第一循环器，包括耦合用于与前级收发器通信的第一端口，经由第一开关选择性地与接收放大器的输出端耦合的第二端口，以及经由第二开关选择性地与发射机放大器的输入端耦合的第三端口 ; 以及第二循环器，包括耦合用于经由所述天线进行通信的第一端口，与所述接收器放大器的输入端耦合的第二端口，以及与所述发射器放大器的输出端耦合的第三端口。第二开关在接收模式下工作，以将第一循环器的第三端口连接到第一负载阻抗，用于吸收经由第一循环器从前级收发器反射的能量，并且在发送模式下操作以连接第三端口第一个循环器到发射机放大器的输入端。第一切换在发射模式下工作，以将第一循环器的第二端口连接到第二负载阻抗，用于经由第一循环器吸收从发射器放大器的输入反射的能量，并且在接收模式下操作以连接第二端口的第一个循环器到接收放大器的输出。

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