公开(公告)号：USD593100S1

公开(公告)日：2009-05-26

申请号：US29320171

申请日：2008-06-23

申请人： Pedro Alfonso ,  Yinggang Du

设计人： Pedro Alfonso ,  Yinggang Du

公开(公告)号：US20080070564A1

公开(公告)日：2008-03-20

申请号：US11532488

申请日：2006-09-15

申请人： Ye Li ,  Anthony C.K. Soong ,  Yinggang Du ,  Jianmin Lu

发明人： Ye Li ,  Anthony C.K. Soong ,  Yinggang Du ,  Jianmin Lu

IPC分类号： H04Q7/20

CPC分类号： H04B7/0452 ,  H04B7/0439 ,  H04B7/0617

摘要： Disclosed herein is a system and method for downlink beamforming that takes into account imperfect channel state information (CSI) at the transmitter when determining the steering vector used in the beamforming process. The steering vector is calculated to increase the ratio of the average power of a desired signal component to the sum of the interference power of other wireless terminals, referred to as the signal-to-leakage ratio. By accounting for imperfect CSI when calculating the steering vector, the bit-error rate for a given signal-to-noise ratio is decreased. Also disclosed is a power allocation method that improves performance of the system by increasing the signal-to-interference-plus-noise ratio for all of the wireless terminals currently communicating with the base station. The power allocation similarly decreases the bit-error rate for a given signal-to-noise ratio, especially at high signal-to-noise ratios.

摘要翻译： 这里公开了一种用于下行链路波束成形的系统和方法，其在确定在波束形成处理中使用的导向向量时考虑到发射机处的不完美信道状态信息（CSI）。 计算导向矢量以增加所需信号分量的平均功率与其它无线终端的干扰功率之和的比率，称为信号与泄漏比。 通过在计算导向矢量时考虑不完善的CSI，给定信噪比的误码率降低。 还公开了一种功率分配方法，其通过增加当前与基站通信的所有无线终端的信号与干扰加噪声比来提高系统的性能。 功率分配类似地降低给定信噪比的比特误码率，特别是在高信噪比下。