公开(公告)号：EP1527619A4

公开(公告)日：2009-10-14

申请号：EP03767192

申请日：2003-08-01

申请人： MOTOROLA INC

发明人： LUZ YUDA Y ,  TENBROOK KEITH ,  DECLERCK DAN

IPC分类号： H04W36/14 ,  H04Q7/00

CPC分类号： H04W36/0066 ,  H04W36/30

公开(公告)号：EP0885510A4

公开(公告)日：2003-02-05

申请号：EP97901934

申请日：1997-01-15

申请人： MOTOROLA INC

发明人： LUREY DANIEL M ,  LUZ YUDA Y ,  RADER SHEILA M ,  ROTTINGHAUS ALAN P

IPC分类号： H03D7/00 ,  H01Q1/24 ,  H01Q3/26 ,  H03B28/00 ,  H03C1/00 ,  H03C3/00 ,  H03D7/16 ,  H04B1/04 ,  H04B1/16 ,  H04B1/26 ,  H04B1/28 ,  H04B1/38 ,  H04B1/40 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/185 ,  H04B7/24 ,  H04B7/26 ,  H04L1/06 ,  H04L1/22 ,  H04L27/20 ,  H04W4/18 ,  H04W88/06 ,  H04L25/08

CPC分类号： H01Q1/246 ,  H01Q3/2605 ,  H03B28/00 ,  H03C1/00 ,  H03C3/00 ,  H03D7/165 ,  H04B1/0003 ,  H04B1/001 ,  H04B1/0017 ,  H04B1/0021 ,  H04B1/0483 ,  H04B1/16 ,  H04B1/26 ,  H04B1/28 ,  H04B1/38 ,  H04B1/40 ,  H04B7/04 ,  H04B7/06 ,  H04B7/0691 ,  H04B7/0802 ,  H04B7/0874 ,  H04B7/18515 ,  H04B7/24 ,  H04L1/06 ,  H04L1/22 ,  H04W4/18 ,  H04W88/06

摘要： An apparatus and a method for routing digitized radio frequency (RF) signals (140-143) to a plurality of paths are described herein. In accordance with a first preferred embodiment, the apparatus includes a digital converter/modulator (DUC) (125 or 129) coupled to a scaling and switching network (100N) which includes, at least, a first, second, third and fourth digital switch, and a first, second and third adder. Within the scaling and switching network, the first digital switch is responsive to the DUC. The first adder is responsive to the first and second digital switches, while the second adder is responsive to the third and fourth digital switches. Finally, the third adder is responsive to the first and second adders.

公开(公告)号：EP1169750A4

公开(公告)日：2004-12-08

申请号：EP00980378

申请日：2000-11-14

申请人： MOTOROLA INC

发明人： NEUMILLER PHILLIP D ,  LUZ YUDA Y ,  LUNDBY WALTER F ,  REICH PAUL W

IPC分类号： H04B7/06 ,  H04B7/10 ,  H01Q21/24

CPC分类号： H04B7/10 ,  H04B7/0619

摘要： A dynamically controlled polarization diversity system and method (100) for wireless communications comprises a transmitter, such as a base station (102), for transmitting signals with an adaptively controlled polarization state to a receiver, such as a mobile station (104). The polarization state may be adaptively varied by rotating a polarization angle, of the transmit signals. In one version, the polarization angle may be substantially continuously rotated from approximately 180 degrees to approximately 0 degrees in predetermined intervals. As the transmitter transmits signals with a varying polarization state, the receiver analyses the received transmit signals at the various states. The receiver may, for example, detect the received signal strength (RSSI) at each of the polarization states. The receiver then transmits a reply signal to the transmitter indicating the relative RSSI for each of the polarization states. The transmitter thereafter transmits at the polarization state which has the highest RSSI.