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1.发明公开METHOD AND APPARATUS FOR ERROR COMPENSATION IN A HYBRID MATRIX AMPLIFICATION SYSTEM 有权方法和装置在混合矩阵放大系统误差补偿
公开(公告)号：EP1506615A4
公开(公告)日：2005-08-10
申请号：EP03721932
申请日：2003-04-29
申请人： MOTOROLA INC
发明人： LUZ YUDA , CHEN JIANGNAN JASON , ZHOU PHILIP
CPC分类号： H03F3/24 , H03F1/34 , H03F3/602 , H04B1/0483 , H04B2001/0433
摘要： A base station subsystem (102) includes at least one transmit branch (300) having a forward path (301) that includes a signal processing unit (330) coupled at an input to an input Fourier Transform Matrix (FTM) (320) and at an output to an output FTM (360). The transmit branch further includes two error compensation loops, an inner feedback loop that includes an inner loop feedback circuit (302) and an outer feedback loop that includes an outer loop feedback circuit (303). The inner feedback loop provides error compensation for error introduced by the signal processing section to a signal input to the transmit branch. The outer loop provides error compensation for all residual error introduced into the signal when routed through the transmit branch forward path after error compensation may be performed by the inner feedback loop.
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2.发明公开METHOD AND SYSTEM FOR MINIMIZING OVERLAP NULLING IN SWITCHED BEAMS 有权最小化ÜBERLAPPUNGSNULLUNG英格方法和系统波束切换
公开(公告)号：EP1582012A4
公开(公告)日：2006-11-02
申请号：EP03800214
申请日：2003-12-23
申请人： MOTOROLA INC
发明人： FRANK COLIN , LUZ YUDA , CHEN JASON JIANGNAN , TOUVANNAS JOHN
摘要： A wireless system (30) minimizes nulls within the wireless system while simultaneously providing diversity. The system uses time or frequency offset on signals input to an antenna (40, 50, 60, 100) to minimize interference in regions of beam overlap. Additionally, polarization diversity can be introduced using Butler Matrices (69, 70) in conjunction with array elements (102-128) to enhance the interference reduction. As a result, the wireless system has increased capacity and coverage due to an enhanced signal to interference ratio in the areas of beam overlap (O1-O3).
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3.发明公开METHOD AND SYSTEM FOR MINIMIZING OVERLAP NULLING IN SWITCHED BEAMS 有权最小化ÜBERLAPPUNGSNULLUNGIN的方法和系统波束切换
公开(公告)号：EP1582012A2
公开(公告)日：2005-10-05
申请号：EP03800214
申请日：2003-12-23
申请人： MOTOROLA INC
发明人： FRANK COLIN , LUZ YUDA , CHEN JASON JIANGNAN , TOUVANNAS JOHN
摘要： A wireless system (30) minimizes nulls within the wireless system while simultaneously providing diversity. The system uses time or frequency offset on signals input to an antenna (40, 50, 60, 100) to minimize interference in regions of beam overlap. Additionally, polarization diversity can be introduced using Butler Matrices (69, 70) in conjunction with array elements (102-128) to enhance the interference reduction. As a result, the wireless system has increased capacity and coverage due to an enhanced signal to interference ratio in the areas of beam overlap (O1-O3).
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