公开(公告)号：US20030083016A1

公开(公告)日：2003-05-01

申请号：US10247927

申请日：2002-09-20

申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V.

发明人： David H. Evans ,  Bhavin S. Khatri ,  Deborah L. Raynes

IPC分类号： H04B017/00 ,  H04M001/00 ,  H04B001/38 ,  G01R001/00

CPC分类号： H04B7/0874 ,  H04B7/0608 ,  H04B7/0691 ,  H04B7/0814 ,  H04B7/0817

摘要： A method of selecting a combination of transmit antennas (TA1 to TA4) and receive antennas (RA1 to RA4) in a MIMO antenna system to give the best isolation from adjacent parallel signal streams comprises transmitting a first signal from one of the transmit antennas and measuring a quality metric, for example signal strength, of the received signal at each of the receive antennas. The process is repeated using signals transmitted in turn by each the remaining transmit antennas. A channel matrix is compiled of the transmit antennas versus the receive antennas and a selection is made of a combination of transmit and receive antennas receiving acceptably a first signal and unacceptably a second signal and vice versa. The selected combination is used to send and receive MIMO signals. Switches (SW1, SW2) are provided for coupling the selected antennas to the respective transmitters (TX1, TX2) and receivers (RX1, RX2).

摘要翻译： 在MIMO天线系统中选择发射天线（TA1至TA4）和接收天线（RA1至RA4）的组合以从相邻并行信号流中提供最佳隔离的方法包括从发射天线之一发送第一信号并测量 在每个接收天线处的接收信号的质量度量，例如信号强度。 使用依赖于每个剩余的发射天线的信号重复该过程。 编码发射天线与接收天线的信道矩阵，并且选择发射天线和接收天线的组合，可接收地接收第一信号，反之亦然。 所选择的组合用于发送和接收MIMO信号。 提供开关（SW1，SW2）用于将所选择的天线耦合到各个发射机（TX1，TX2）和接收机（RX1，RX2）。

公开(公告)号：US20030013468A1

公开(公告)日：2003-01-16

申请号：US10156441

申请日：2002-05-28

申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V.

发明人： Bhavin S. Khatri

IPC分类号： H04B007/005

CPC分类号： H04B7/0617 ,  H04B1/7117

摘要： A radio communication system comprises a communication channel between a transmitter (106) comprising a plurality of antennas (108) and a receiver (112) comprising at least one antenna. The communication channel is wideband and comprises a plurality of paths, and the transmitter comprises means for splitting data for transmission into a plurality of sub-streams. The receiver comprises fewer antennas than the number of transmitted sub-streams and sampling means for determining at least as many substantially uncorrelated received signal samples as the number of sub-streams. In one embodiment, transmissions on the channel employ code division techniques and the sampling means comprises a Rake receiver. In another embodiment a maximum likelihood technique is used to generate sufficient samples. By means of the present invention a receiver for use in a Multiple Input Multiple Output (MIMO) communication system may comprise fewer antennas than the number of sub-streams, thereby enabling smaller terminals.

摘要翻译： 无线电通信系统包括在包括多个天线（108）的发射机（106）和包括至少一个天线的接收机（112）之间的通信信道。 通信信道是宽带的并且包括多个路径，并且发射机包括用于分割用于传输到多个子流中的数据的装置。 接收机包括比发送的子流的数量更少的天线以及用于确定与子流的数量至少相同的基本上不相关的接收信号样本的采样装置。 在一个实施例中，信道上的传输采用代码分割技术，并且采样装置包括Rake接收机。 在另一个实施例中，使用最大似然技术来产生足够的样本。 通过本发明，在多输入多输出（MIMO）通信系统中使用的接收机可以包括比子流数更少的天线，从而实现较小的终端。

公开(公告)号：US20020127978A1

公开(公告)日：2002-09-12

申请号：US10055370

申请日：2002-01-23

申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V.

发明人： Bhavin S. Khatri

IPC分类号： H04B007/00

CPC分类号： H04B7/0413 ,  H04B7/0617

摘要： A radio communication system comprises a communication channel between two terminals each comprising a plurality of antennas (108). The communication channel comprises a plurality of paths, and at least one of the terminals comprises a receiver having means (306, 308) for determining the directions from which the strongest signals are received, corresponding to paths between the terminals. The terminal may also include a transmitter having means (302) for separating a signal into a plurality of parts, each having a reduced bit rate, and transmitting the parts in respective directions corresponding to those from which the strongest signals are received.

摘要翻译： 无线电通信系统包括两个终端之间的通信信道，每个终端包括多个天线（108）。 所述通信信道包括多个路径，并且所述终端中的至少一个包括具有与终端之间的路径对应的用于确定从其接收最强信号的方向的装置（306,308）的接收机。 终端还可以包括具有用于将信号分离为多个部分的装置（302）的发射机，每个部分具有降低的比特率，并且在与接收最强信号的方向相对应的各个方向上发送部分。