-
公开(公告)号：AU742826B2
公开(公告)日：2002-01-10
申请号：AU1189199
申请日：1998-10-14
Applicant: QUALCOMM INC
Inventor： SILBERGER AMNON , BUTLER BRIAN , SCHIFF LEONARD
Abstract: A method and apparatus for accurately determining the operating characteristics or impact of nonlinear effects on devices or communication systems transferring orthogonally coded spread-spectrum communication signals. A Walsh Power Ratio, is used to more accurately determine system response. This information can be used by power control loops in controlling or adjusting the operation of nonlinear elements or stages such as high power amplifiers in orthogonal CDMA communication systems to provide improved system response. The information can also be employed in assigning channels to systems users, and to proceed with physical changes to system hardware. The measurements used to formulate the WPR can be made to individual components or to entire systems by injecting communication signals in multiple channels containing data, and leaving at least one empty channel. The received power per channel on the output side of the system or device is then measured. A ratio of power density for the empty to the active channels is then formed. The determination of WPR for a system or components can be realized during periods of operation through periodic transfer of test signals either at allocated times or by interleaving among existing traffic signals in the system.
-
公开(公告)号：AT469528T
公开(公告)日：2010-06-15
申请号：AT99971597
申请日：1999-10-26
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD
Abstract: An apparatus and method for using a variable loop gain in a double-loop power control system to control the power of a forward link signal sent by a gateway to a user terminal to compensate for fading in a wireless communications system. In one embodiment the invention includes the steps of detecting fast fading in the forward link signal and informing the gateway of the fast fading; and at the gateway, reducing the loop gain of the power control loop when fast fading is indicated. In another embodiment, the invention includes the steps of, at the gateway, detecting fast fading in a reverse link signal received from the user terminal and reducing the loop gain of the power control loop when fast fading is indicated.
-
公开(公告)号：AT403983T
公开(公告)日：2008-08-15
申请号：AT00978290
申请日：2000-10-27
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD
-
Patent Agency Ranking
公开(公告)号：AT403982T
公开(公告)日：2008-08-15
申请号：AT03765996
申请日：2003-07-23
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD
IPC: H04B7/185
-
公开(公告)号：DE69805832T2
公开(公告)日：2003-01-23
申请号：DE69805832
申请日：1998-10-14
Applicant: QUALCOMM INC
Inventor： SILBERGER AMNON , BUTLER BRIAN , SCHIFF LEONARD
Abstract: A method and apparatus for accurately determining the operating characteristics or impact of nonlinear effects on devices or communication systems transferring orthogonally coded spread-spectrum communication signals. A Walsh Power Ratio, is used to more accurately determine system response. This information can be used by power control loops in controlling or adjusting the operation of nonlinear elements or stages such as high power amplifiers in orthogonal CDMA communication systems to provide improved system response. The information can also be employed in assigning channels to systems users, and to proceed with physical changes to system hardware. The measurements used to formulate the WPR can be made to individual components or to entire systems by injecting communication signals in multiple channels containing data, and leaving at least one empty channel. The received power per channel on the output side of the system or device is then measured. A ratio of power density for the empty to the active channels is then formed. The determination of WPR for a system or components can be realized during periods of operation through periodic transfer of test signals either at allocated times or by interleaving among existing traffic signals in the system.
-
公开(公告)号：DE69805832D1
公开(公告)日：2002-07-11
申请号：DE69805832
申请日：1998-10-14
Applicant: QUALCOMM INC
Inventor： SILBERGER AMNON , BUTLER BRIAN , SCHIFF LEONARD
Abstract: A method and apparatus for accurately determining the operating characteristics or impact of nonlinear effects on devices or communication systems transferring orthogonally coded spread-spectrum communication signals. A Walsh Power Ratio, is used to more accurately determine system response. This information can be used by power control loops in controlling or adjusting the operation of nonlinear elements or stages such as high power amplifiers in orthogonal CDMA communication systems to provide improved system response. The information can also be employed in assigning channels to systems users, and to proceed with physical changes to system hardware. The measurements used to formulate the WPR can be made to individual components or to entire systems by injecting communication signals in multiple channels containing data, and leaving at least one empty channel. The received power per channel on the output side of the system or device is then measured. A ratio of power density for the empty to the active channels is then formed. The determination of WPR for a system or components can be realized during periods of operation through periodic transfer of test signals either at allocated times or by interleaving among existing traffic signals in the system.
-
公开(公告)号：BR9813861A
公开(公告)日：2000-09-26
申请号：BR9813861
申请日：1998-10-14
Applicant: QUALCOMM INC
Inventor： SILBERGER AMNON , BUTLER BRIAN , SCHIFF LEONARD
Abstract: A method and apparatus for accurately determining the operating characteristics or impact of nonlinear effects on devices or communication systems transferring orthogonally coded spread-spectrum communication signals. A Walsh Power Ratio, is used to more accurately determine system response. This information can be used by power control loops in controlling or adjusting the operation of nonlinear elements or stages such as high power amplifiers in orthogonal CDMA communication systems to provide improved system response. The information can also be employed in assigning channels to systems users, and to proceed with physical changes to system hardware. The measurements used to formulate the WPR can be made to individual components or to entire systems by injecting communication signals in multiple channels containing data, and leaving at least one empty channel. The received power per channel on the output side of the system or device is then measured. A ratio of power density for the empty to the active channels is then formed. The determination of WPR for a system or components can be realized during periods of operation through periodic transfer of test signals either at allocated times or by interleaving among existing traffic signals in the system.
-
公开(公告)号：AU1189199A
公开(公告)日：1999-05-03
申请号：AU1189199
申请日：1998-10-14
Applicant: QUALCOMM INC
Inventor： SILBERGER AMNON , BUTLER BRIAN , SCHIFF LEONARD
Abstract: A method and apparatus for accurately determining the operating characteristics or impact of nonlinear effects on devices or communication systems transferring orthogonally coded spread-spectrum communication signals. A Walsh Power Ratio, is used to more accurately determine system response. This information can be used by power control loops in controlling or adjusting the operation of nonlinear elements or stages such as high power amplifiers in orthogonal CDMA communication systems to provide improved system response. The information can also be employed in assigning channels to systems users, and to proceed with physical changes to system hardware. The measurements used to formulate the WPR can be made to individual components or to entire systems by injecting communication signals in multiple channels containing data, and leaving at least one empty channel. The received power per channel on the output side of the system or device is then measured. A ratio of power density for the empty to the active channels is then formed. The determination of WPR for a system or components can be realized during periods of operation through periodic transfer of test signals either at allocated times or by interleaving among existing traffic signals in the system.
-
-
-
-
-
-
-
Search Results
18
records
(took 0.022 seconds)
