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    POWER AMPLIFIER SHARING IN A WIRELESS COMMUNICATION SYSTEM WITH TRANSMIT DIVERSITY
    11.
    发明专利
    POWER AMPLIFIER SHARING IN A WIRELESS COMMUNICATION SYSTEM WITH TRANSMIT DIVERSITY 未知

    公开(公告)号：CA2352369A1

    公开(公告)日：2002-02-04

    申请号：CA2352369

    申请日：2001-07-04

    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 ,  H04B1/02

    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 t o 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 composi te 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 secon d 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 composi te 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 a n RF signal. Each pre-distorted composite signal is then amplified in the respective amplifier (670 and 675).

    12.
    发明专利
    未知

    公开(公告)号：BR0006769A

    公开(公告)日：2001-08-14

    申请号：BR0006769

    申请日：2000-10-26

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： CLARKSON KENNETH L ,  HAMPEL KARL GEORG ,  MANKIEWICH PAUL MATTHEW ,  POLAKOS PAUL ANTHONY ,  HOBBY JOHN D

    IPC: H04B7/005 ,  H04W24/00 ,  H04W52/34 ,  H04Q7/34

    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.

    SIGNAL NOTCHING SYSTEM FOR LIMITING SIGNAL PEAKS
    13.
    发明专利
    SIGNAL NOTCHING SYSTEM FOR LIMITING SIGNAL PEAKS 未知

    公开(公告)号：CA2314555C

    公开(公告)日：2003-12-02

    申请号：CA2314555

    申请日：2000-07-20

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： POLAKOS PAUL ANTHONY ,  MA ZHENGXIANG

    IPC: H03G7/06 ,  H03F1/32 ,  H03G3/30 ,  H04B1/04 ,  H04L25/03 ,  H04L27/00 ,  H04B1/00

    Abstract: A signal notching system reduces signal peaks by notching the peak of a signal above a threshold to produce a notched signal. The notched signal is then filtered to produce a resulting signal with a reduced peak amplitude. For example, in an implementation where the signal is represented by signal samples, the peak notching system first locates a peak sample that is beyond a threshold, such as a sample representing a positive peak sample of a peak above the threshold. Once a peak sample is located, the peak notching system adjusts the peak sample by an amount which is a function of the amount that the peak sample is beyond the threshold, effectively creating a notched signal with a one sample notch at the peak. The peak notching system filters the notched signal to fill in the notch to produce a signal with a reduced peak.

    SYSTEM AND METHOD FOR PRODUCING AN AMPLIFIED SIGNAL
    14.
    发明专利
    SYSTEM AND METHOD FOR PRODUCING AN AMPLIFIED SIGNAL 未知

    公开(公告)号：CA2324846C

    公开(公告)日：2003-03-18

    申请号：CA2324846

    申请日：2000-10-31

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： POLAKOS PAUL ANTHONY ,  MA ZHENGXIANG

    IPC: H03F3/68 ,  H03F1/02 ,  H03F1/32 ,  H03F3/20 ,  H03F3/21 ,  H03F3/60

    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.

    METHODS AND APPARATUS FOR CHARACTERIZATION, ADJUSTMENT AND OPTIMIZATION OF WIRELESS NETWORKS
    15.
    发明专利
    METHODS AND APPARATUS FOR CHARACTERIZATION, ADJUSTMENT AND OPTIMIZATION OF WIRELESS NETWORKS 未知

    公开(公告)号：CA2324387A1

    公开(公告)日：2001-05-04

    申请号：CA2324387

    申请日：2000-10-24

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： HOBBY JOHN D ,  POLAKOS PAUL ANTHONY ,  HAMPEL KARL GEORG ,  MANKIEWICH PAUL MATTHEW ,  CLARKSON KENNETH L

    IPC: H04B7/005 ,  H04W24/00 ,  H04W52/34 ,  H04Q7/36

    Abstract: Improved techniques for characterizing, adjusting and optimizing the overa ll performance of a wireless network. In an illustrative embodiment, the overal l network performance for a particular network configuration is characterized by a vector with two components, one representing network coverage and another representing netwo rk capacity. Network coverage is defined by the likelihood of service under load, includi ng 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.

    Signal notching system for limiting signal peaks
    17.
    发明专利
    Signal notching system for limiting signal peaks 未知

    公开(公告)号：AU4878700A

    公开(公告)日：2001-02-01

    申请号：AU4878700

    申请日：2000-07-24

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： MA ZHENGXIANG ,  POLAKOS PAUL ANTHONY

    IPC: H03G7/06 ,  H03F1/32 ,  H03G3/30 ,  H04B1/04 ,  H04L25/03 ,  H04L27/00 ,  H03G11/00 ,  H04B7/216 ,  H04J14/02

    Abstract: A signal notching system reduces signal peaks by notching the peak of a signal above a threshold to produce a notched signal. The notched signal is then filtered to produce a resulting signal with a reduced peak amplitude. For example, in an implementation where the signal is represented by signal samples, the peak notching system first locates a peak sample that is beyond a threshold, such as a sample representing a positive peak sample of a peak above the threshold. Once a peak sample is located, the peak notching system adjusts the peak sample by an amount which is a function of the amount that the peak sample is beyond the threshold, effectively creating a notched signal with a one sample notch at the peak. The peak notching system filters the notched signal to fill in the notch to produce a signal with a reduced peak.

    SIGNAL NOTCHING SYSTEM FOR LIMITING SIGNAL PEAKS
    18.
    发明专利
    SIGNAL NOTCHING SYSTEM FOR LIMITING SIGNAL PEAKS 未知

    公开(公告)号：CA2314555A1

    公开(公告)日：2001-01-28

    申请号：CA2314555

    申请日：2000-07-20

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： MA ZHENGXIANG ,  POLAKOS PAUL ANTHONY

    IPC: H03G7/06 ,  H03F1/32 ,  H03G3/30 ,  H04B1/04 ,  H04L25/03 ,  H04L27/00 ,  H04B1/00

    Abstract: A signal notching system reduces signal peaks by notching the peak of a sign al above a threshold to produce a notched signal. The notched signal is then filtered to produce a resulting signal with a reduced peak amplitude. For example, in an implementation where the signal is represented by signal samples, the peak notching system first locates a peak sample that is beyond a threshold, such as a sample representing a positive peak sample of a peak above the threshold. Once a pe ak sample is located, the peak notching system adjusts the peak sample by an amount which is a function of the amount that the peak sample is beyond the threshold, effectively creating a notched signal with a one sample notch at the peak. The peak notching syst em filters the notched signal to fill in the notch to produce a signal with a reduced peak.

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