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公开(公告)号：DE60035755T2
公开(公告)日：2008-04-30
申请号：DE60035755
申请日：2000-10-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CLARKSON KENNETH L , HAMPEL KARL GEORG , HOBBY JOHN D , MANKIEWICH PAUL MATTHEW , POLAKOS PAUL ANTHONY
Abstract: Improved techniques for characterizing, adjusting and optimizing the overall performance of a wireless network. In an illustrative embodiment, the overall network performance for a particular network configuration is characterized by a vector with two components, one representing network coverage and another representing network capacity. Network coverage is defined by the likelihood of service under load, including interference, and may be further weighted by traffic density. Network capacity is defined by an amount of traffic with a given spatial distribution that can be served at a given overall target-blocking rate. The overall network performance may be characterized using a two-dimensional capacity/coverage diagram which plots overall network performance vectors, each including a network capacity component and a network coverage component, for various network configurations. The overall network performance may be improved or optimized with respect to a given subset of network parameters by using an algorithm that proposes potential network configurations and evaluates them with respect to their overall network performance.
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公开(公告)号：DE60102882T2
公开(公告)日：2005-04-21
申请号：DE60102882
申请日：2001-02-12
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
IPC: C12P21/00 , C12N1/21 , C12R1/19 , H01Q1/24 , H01Q21/29 , H03F1/32 , H03F3/24 , H03F3/60 , H04B1/04 , H04B7/02 , H04B7/06 , H04B7/26 , H03F3/68
Abstract: The technique of amplifier sharing is implemented in a system designed to accommodate transmit diversity. In one embodiment of the invention, the amplifiers (670 and 675) are shared 1) to amplify a first and a second diversity-encoded signal, each of which represents the information of a first signal that is to be transmitted using transmit diversity, and 2) to amplify a second signal to be transmitted without using transmit diversity. The first and second diversity-encoded signals are used to form a first and a second composite signal. Each composite signal is amplified in a different one of two power amplifiers (670 and 675). Each amplified composite signal is then used to form an amplified first diversity-encoded signal and an amplified second diversity-encoded signal. The first and second composite signals can also be formed using the second signal. Each composite signal is then amplified in a different one of the two power amplifiers (670 and 675) and the two amplified composite signals are used to form an amplified second signal. In another embodiment of the invention, the first and second composite signals can be formed in the digital domain. Each composite signal is digitally pre-distorted and then modulated onto a transmission frequency signal, such as an RF signal. Each pre-distorted composite signal is then amplified in the respective amplifier (670 and 675).
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公开(公告)号：DE60102117T2
公开(公告)日：2004-09-09
申请号：DE60102117
申请日：2001-06-18
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ZHENGXIANG MA , POLAKOS PAUL ANTHONY
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公开(公告)号：AU5771801A
公开(公告)日：2002-02-07
申请号：AU5771801
申请日：2001-07-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
IPC: C12P21/00 , C12N1/21 , C12R1/19 , H01Q1/24 , H01Q21/29 , H03F1/32 , H03F3/24 , H03F3/60 , H04B1/04 , H04B7/02 , H04B7/06 , H04B7/26
Abstract: The technique of amplifier sharing is implemented in a system designed to accommodate transmit diversity. In one embodiment of the invention, the amplifiers (670 and 675) are shared 1) to amplify a first and a second diversity-encoded signal, each of which represents the information of a first signal that is to be transmitted using transmit diversity, and 2) to amplify a second signal to be transmitted without using transmit diversity. The first and second diversity-encoded signals are used to form a first and a second composite signal. Each composite signal is amplified in a different one of two power amplifiers (670 and 675). Each amplified composite signal is then used to form an amplified first diversity-encoded signal and an amplified second diversity-encoded signal. The first and second composite signals can also be formed using the second signal. Each composite signal is then amplified in a different one of the two power amplifiers (670 and 675) and the two amplified composite signals are used to form an amplified second signal. In another embodiment of the invention, the first and second composite signals can be formed in the digital domain. Each composite signal is digitally pre-distorted and then modulated onto a transmission frequency signal, such as an RF signal. Each pre-distorted composite signal is then amplified in the respective amplifier (670 and 675).
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公开(公告)号：BR0006771A
公开(公告)日：2001-08-14
申请号：BR0006771
申请日：2000-10-26
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CLARKSON KENNETH L , HAMPEL KARL GEORG , POLAKOS PAUL ANTHONY , HOBBY JOHN D
Abstract: Improved techniques for optimizing performance of a wireless network. In an illustrative embodiment, a derivative-based optimization process is applied to optimize an objective function of a network performance metric with respect to a number of network tuning parameter variables. The optimization may be based on first or higher order derivatives of the objective function with respect to the selected network parameter variables. The objective function may include, e.g., one or more of a maximization of network coverage, a maximization of network capacity, and a minimization of network resources. Additional network parameters which are not variables in optimization process serve as constraints to the optimization process. Advantageously, the invention substantially improves the process of designing, adjusting and optimizing the performance of wireless networks.
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Patent Agency Ranking
公开(公告)号：BR0005431A
公开(公告)日：2001-08-07
申请号：BR0005431
申请日：2000-11-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
Abstract: A signal amplification system involves decomposing a signal into two or more parts, amplifying the parts and then combining the amplified parts to produce the amplified signal. The decomposition can be done such that the resulting parts have characteristics that are amenable to efficient amplification. For example, decomposition of the signal to be amplified can be done using at least one threshold. The first part of the signal to be amplified can be formed by the portion of the signal within the threshold. As such, because the first part forms a signal with a lower PAR, the first part of the signal can be amplified more efficiently than the original signal. The second part of the signal can be formed by the portion of the original signal beyond the threshold. Because the second part is mostly zero, the second part can also be amplified efficiently, for example with a class C type amplifier which does not dissipate any energy when the input signal is zero.
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公开(公告)号：CA2324846A1
公开(公告)日：2001-05-19
申请号：CA2324846
申请日：2000-10-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
Abstract: A signal amplification system involves decomposing a signal into two or mo re parts, amplifying the parts and then combining the amplified parts to produc e the amplified signal. The decomposition can be done such that the resulting part s have characteristics that are amenable to efficient amplification. For example, decomposition of the signal to be amplified can be done using at least one threshold. The first part of the signal to be amplified can be formed by the portion of the signal within the threshold. As such, because the first part forms a signal with a lower PAR, the first part of the signal can be amplified more efficiently than the original signal. The second part of the signal can be formed by the portion of the original signal beyond the threshold. Because the second part is mostly zero, the second par t can also be amplified efficiently, for example with a class C type amplifier whi ch does not dissipate any energy when the input signal is zero.
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公开(公告)号：AU6958700A
公开(公告)日：2001-05-10
申请号：AU6958700
申请日：2000-10-27
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CLARKSON KENNETH L , POLAKOS PAUL ANTHONY , HOBBY JOHN D , HAMPEL KARL GEORG
Abstract: Techniques for determination of network parameters in, e.g., a processor-implemented system for characterizing, adjusting or optimizing the performance of a wireless network. In an illustrative embodiment, values of one or more link parameters of the wireless network are interpolated along edges in a mesh of data points derived at least in part from road location data characterizing an area serviced by the wireless network. A measure of network performance, e.g., a coverage measure based on pilot signal-to-interference ratio, may be generated using the interpolated values. The edges of the mesh have associated therewith a set of edge weights representative of traffic in the wireless network. The edge weights may be adjusted so as to be in agreement with available network traffic data. Interpolating between the data points of the road-based mesh permits the network performance measure to be computed as a smooth, differentiable function of the one or more link parameters, thereby simplifying network characterization, adjustment and optimization.
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公开(公告)号：AU6958600A
公开(公告)日：2001-05-10
申请号：AU6958600
申请日：2000-10-27
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CLARKSON KENNETH L , POLAKOS PAUL ANTHONY , HOBBY JOHN D , HAMPEL KARL GEORG
Abstract: Improved techniques for optimizing performance of a wireless network. In an illustrative embodiment, a derivative-based optimization process is applied to optimize an objective function of a network performance metric with respect to a number of network tuning parameter variables. The optimization may be based on first or higher order derivatives of the objective function with respect to the selected network parameter variables. The objective function may include, e.g., one or more of a maximization of network coverage, a maximization of network capacity, and a minimization of network resources. Additional network parameters which are not variables in optimization process serve as constraints to the optimization process. Advantageously, the invention substantially improves the process of designing, adjusting and optimizing the performance of wireless networks.
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40.发明专利
公开(公告)号：AU6958500A
公开(公告)日：2001-05-10
申请号：AU6958500
申请日：2000-10-27
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CLARKSON KENNETH L , POLAKOS PAUL ANTHONY , MANKIEWICH PAUL MATTHEW , HOBBY JOHN D , HAMPEL KARL GEORG
Abstract: Improved techniques for characterizing, adjusting and optimizing the overall performance of a wireless network. In an illustrative embodiment, the overall network performance for a particular network configuration is characterized by a vector with two components, one representing network coverage and another representing network capacity. Network coverage is defined by the likelihood of service under load, including interference, and may be further weighted by traffic density. Network capacity is defined by an amount of traffic with a given spatial distribution that can be served at a given overall target-blocking rate. The overall network performance may be characterized using a two-dimensional capacity/coverage diagram which plots overall network performance vectors, each including a network capacity component and a network coverage component, for various network configurations. The overall network performance may be improved or optimized with respect to a given subset of network parameters by using an algorithm that proposes potential network configurations and evaluates them with respect to their overall network performance.
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