公开(公告)号：US20090290517A1

公开(公告)日：2009-11-26

申请号：US12124493

申请日：2008-05-21

申请人： Sudarshan A. RAO ,  Kam Hung WU ,  Yifei YUAN

发明人： Sudarshan A. RAO ,  Kam Hung WU ,  Yifei YUAN

IPC分类号： H04J3/00

CPC分类号： H01Q3/267

摘要： The present invention provides a method of calibrating base station comprising a plurality of antennas and operating in an Orthogonal Frequency Division Multiplex (OFDM) and Time Division Duplex (TDD) mode. One embodiment of the method includes a method of calibrating a base station comprising a plurality of antennas for beamsteering forward link traffic data to a target mobile in a TDD wireless communication system. Each antenna is connected to a corresponding radio via a transmit/receive switch that is configured to switch between a receive path and a transmit path. The method includes transmitting a first signal from a first radio via a first cross-over cable coupled to the first radio and a second radio such that the first signal is received by the second radio. The method also includes transmitting a second signal from the second radio via a second cross-over cable coupled between the first and second radios such that the second signal is received by the first radio. The method further includes determining, based on at least one of the first or second signals, a relative weight that can be applied to traffic signals transmitted from the second radio.

摘要翻译： 本发明提供了一种校准包括多个天线并且以正交频分复用（OFDM）和时分双工（TDD））模式操作的基站的方法。 该方法的一个实施例包括校准包括多个天线的基站的方法，用于在TDD无线通信系统中向前向链路业务数据发送到目标移动台。 每个天线通过被配置为在接收路径和发射路径之间切换的发射/接收交换机连接到相应的无线电设备。 该方法包括经由耦合到第一无线电的第一交叉电缆和第二无线电从第一无线电发送第一信号，使得第一信号由第二无线电接收。 该方法还包括经由耦合在第一和第二无线电之间的第二交叉电缆从第二无线电发送第二信号，使得第二信号由第一无线电接收。 该方法还包括基于第一或第二信号中的至少一个确定可以应用于从第二无线电发送的业务信号的相对权重。