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公开(公告)号：JP2001127819A
公开(公告)日：2001-05-11
申请号：JP2000277712
申请日：2000-09-13
Applicant: LUCENT TECHNOLOGIES INC
Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for reducing the power in an adjacent channel in a radio communication system. SOLUTION: A signal to apply correcting is inputted to an amplifier 16 after being predistorted by a digital predistortion generator 12 for digital application, and corrected equivalently and inversely to an estimate distortion generated by that amplifier 16. The correction and amplified distortion are mutually canceled. As a result, linear converting characteristics are provided for a whole system 10. On such conditions, the power in the adjacent channel is reduced.
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公开(公告)号：CA2310344C
公开(公告)日：2002-10-22
申请号：CA2310344
申请日：2000-05-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： VELLA-COLEIRO GEORGE PHILIP , HOFFMANN SHLOMO
Abstract: A low distortion amplifier with an optimization circuit that performs a n automated alignment of the amplifier is provided. The optimization circuit includes an extraction circuit designed to extract various signals indicative of the operation of the amplifier under the current operating conditions. A control circuit using information received from the extraction circuit determines the appropriate control settings for key components of the amplifier for the current operating conditions. The optimization circuit ensures that the amplifier output has a desired signal level while also ensuring that the output has minimum or no intermodulation distortion under all operating conditions.
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3.发明专利
公开(公告)号：CA2317901C
公开(公告)日：2011-04-19
申请号：CA2317901
申请日：2000-09-07
Applicant: LUCENT TECHNOLOGIES INC
Abstract: This invention relates to a method and apparatus for reducing adjacent channel power in wireless communication systems. More particularly, the present invention is directed to a system for digitally and adaptively pre-distorting a signal that includes applying a correction to the signal before it is applied to the input of an amplifier such that the correction is equal and opposite to anticipated distortion produced by the amplifier. Thus, the correction and the amplifier distortion cancel one another resulting in a system with an overall linear transfer characteristic. In these circumstances, the adjacent channel power is desirably reduced.
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4.发明专利
公开(公告)号：DE60044485D1
公开(公告)日：2010-07-15
申请号：DE60044485
申请日：2000-09-04
Applicant: LUCENT TECHNOLOGIES INC
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公开(公告)号：CA2317901A1
公开(公告)日：2001-03-14
申请号：CA2317901
申请日：2000-09-07
Applicant: LUCENT TECHNOLOGIES INC
Abstract: This invention relates to a method and apparatus for reducing adjacent chann el power in wireless communication systems. More particularly, the present invention is directed to a system for digitally and adaptively pre-distorting a signal th at includes applying a correction to the signal before it is applied to the input of an amplifier such that the correction is equal and opposite to anticipated distortion produced by the amplifier. Thus, the correction and the amplifier distortion cancel one another resulting in a system with an overall linear transfer characteristic. In the se circumstances, the adjacent channel power is desirably reduced.
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Patent Agency Ranking6.发明专利
公开(公告)号：AU773197B2
公开(公告)日：2004-05-20
申请号：AU5655400
申请日：2000-09-07
Applicant: LUCENT TECHNOLOGIES INC
Abstract: This invention relates to a method and apparatus for reducing adjacent channel power in wireless communication systems. More particularly, the present invention is directed to a system for digitally and adaptively pre-distorting (in 112) a signal that includes applying a correction to the signal before it is applied to the input of an amplifier (16) such that the correction is equal and opposite to anticipated distortion produced by the amplifier. Thus, the correction and the amplifier distortion cancel one another resulting in a system with an overall linear transfer characteristic. In these circumstances, the adjacent channel power is desirably reduced.
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公开(公告)号：BR0004033A
公开(公告)日：2001-04-17
申请号：BR0004033
申请日：2000-09-06
Applicant: LUCENT TECHNOLOGIES INC
Abstract: This invention relates to a method and apparatus for reducing adjacent channel power in wireless communication systems. More particularly, the present invention is directed to a system for digitally and adaptively pre-distorting (in 112) a signal that includes applying a correction to the signal before it is applied to the input of an amplifier (16) such that the correction is equal and opposite to anticipated distortion produced by the amplifier. Thus, the correction and the amplifier distortion cancel one another resulting in a system with an overall linear transfer characteristic. In these circumstances, the adjacent channel power is desirably reduced.
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8.发明专利
公开(公告)号：AU5655400A
公开(公告)日：2001-03-15
申请号：AU5655400
申请日：2000-09-07
Applicant: LUCENT TECHNOLOGIES INC
Abstract: This invention relates to a method and apparatus for reducing adjacent channel power in wireless communication systems. More particularly, the present invention is directed to a system for digitally and adaptively pre-distorting (in 112) a signal that includes applying a correction to the signal before it is applied to the input of an amplifier (16) such that the correction is equal and opposite to anticipated distortion produced by the amplifier. Thus, the correction and the amplifier distortion cancel one another resulting in a system with an overall linear transfer characteristic. In these circumstances, the adjacent channel power is desirably reduced.
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公开(公告)号：CA2310344A1
公开(公告)日：2000-12-08
申请号：CA2310344
申请日：2000-05-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HOFFMANN SHLOMO , VELLA-COLEIRO GEORGE PHILIP
Abstract: A low distortion amplifier with an optimization circuit that performs a n automated alignment of the amplifier is provided. The optimization circuit includes an extraction circuit designed to extract various signals indicative of the operation of the amplifier under the current operating conditions. A control circuit using information received from the extraction circuit determines the appropriate control settings for key components of the amplifier for the current operating conditions. The optimization circuit ensures that the amplifier output has a desired signal level while also ensuring that the output has minimum or no intermodulation distortion under all operating conditions.
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公开(公告)号：BR0003101A
公开(公告)日：2001-01-30
申请号：BR0003101
申请日：2000-05-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HOFFMANN SHLOMO , VELLA-COLEIRO GEORGE PHILIP
Abstract: A low distortion amplifier with an optimization circuit that performs an automated alignment of the amplifier is provided. The optimization circuit includes an extraction circuit designed to extract various signals indicative of the operation of the amplifier under the current operating conditions. A control circuit using information received from the extraction circuit determines the appropriate control settings for key components of the amplifier for the current operating conditions. The optimization circuit ensures that the amplifier output has a desired signal level while also ensuring that the output has minimum or no intermodulation distortion under all operating conditions.
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