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    • 3. 发明授权
    • Systems and methods for distortion measurement using distortion-to-amplitude transformations
    • 使用失真到幅度变换的失真测量的系统和方法
    • US08358169B2
    • 2013-01-22
    • US12917386
    • 2010-11-01
    • Shreyas SenShyam Kumar DevarakondAbhijit Chatterjee
    • Shreyas SenShyam Kumar DevarakondAbhijit Chatterjee
    • H03F1/26
    • H03F3/193
    • The presently invention is directed to ways to measure distortion effects while allowing for the possibility of significant reduction in test cost. An exemplary embodiment of the present invention provides a method for amplifier distortion measurement including comparing a first amplitude response of an output signal from a power amplifier to a second amplitude response of a reference input signal to determine a set of Amplitude-to-Amplitude (“AM-AM”) distortion values. Additionally, the method for amplifier distortion measurement includes equalizing the first amplitude response of the output signal to match the second amplitude response of the reference input signal based on the set of AM-AM distortion values and creating a difference signal based on a comparison of the equalized output signal to the reference input signal. Furthermore, the method for amplifier distortion measurement includes calculating a set of Amplitude-to-Phase (“AM-PM”) distortion values based on a third amplitude response of the difference signal.
    • 本发明旨在测量失真效应,同时允许显着降低测试成本的可能性。 本发明的示例性实施例提供了一种用于放大器失真测量的方法,包括将来自功率放大器的输出信号的第一幅度响应与参考输入信号的第二幅度响应进行比较,以确定幅度 - 幅度(AM) -AM)失真值。 此外,用于放大器失真测量的方法包括基于AM-AM失真值的集合来均衡输出信号的第一幅度响应以匹配参考输入信号的第二幅度响应,并且基于AM-AM失真值的组合创建差分信号 将输出信号均衡到参考输入信号。 此外,用于放大器失真测量的方法包括基于差分信号的第三幅度响应来计算一组幅度相位(AM-PM)失真值。
    • 4. 发明申请
    • SYSTEMS AND METHODS FOR MEASURING I-Q MISMATCH
    • 用于测量I-Q MISMATCH的系统和方法
    • US20120140807A1
    • 2012-06-07
    • US13114178
    • 2011-05-24
    • Abhijit ChatterjeeShreyas SenShyam Kumar Devarakond
    • Abhijit ChatterjeeShreyas SenShyam Kumar Devarakond
    • H04B17/00
    • H04B1/0475H04B17/11
    • An exemplary embodiment of the present invention provides a method of measuring I-Q mismatch in a system having a transmitter. The transmitter comprises an in-phase up-converter, a quadrature-phase up-converter, and a power detector. The method of measuring I-Q mismatch comprises measuring an in-phase transmit power at the power detector caused by transmitting an in-phase output signal to the in-phase up-converter, measuring a quadrature-phase transmit power at the power detector caused by transmitting a quadrature-phase output signal to the quadrature-phase up-converter, calculating a transmitter-gain-mismatch as a function of the in-phase transmit power and the quadrature-phase transmit power, measuring an I-Q transmit power at the power detector caused by simultaneously transmitting a gain-mismatch-compensated in-phase output signal to the in-phase up-converter and a gain-mismatch-compensated quadrature-phase output signal to the quadrature-phase up-converter, and calculating a transmitter-phase-mismatch as a function of the I-Q transmit power.
    • 本发明的示例性实施例提供了一种在具有发射机的系统中测量I-Q失配的方法。 发射机包括同相上变频器,正交相位上变频器和功率检测器。 测量IQ失配的方法包括:通过将同相输出信号发送到同相上变频器来测量在功率检测器处的​​同相发射功率,测量由发射引起的功率检测器处的​​正交相位发射功率 向正交相位上变频器的正交相输出信号,计算作为同相发射功率和正交相位发射功率的函数的发射机 - 增益失配,测量功率检测器处的​​IQ发射功率, 通过同步地向同相上变频器发送增益失配补偿的同相输出信号,并将增益失配补偿的正交相位输出信号发送到正交上变频器,并且计算发射机 - 作为IQ发射功率的函数的失配。
    • 5. 发明授权
    • Systems and methods for measuring I-Q mismatch
    • 用于测量I-Q不匹配的系统和方法
    • US08526533B2
    • 2013-09-03
    • US13114178
    • 2011-05-24
    • Shreyas SenShyam Kumar DevarakondAbhijit Chatterjee
    • Shreyas SenShyam Kumar DevarakondAbhijit Chatterjee
    • H04L25/03
    • H04B1/0475H04B17/11
    • An exemplary embodiment of the present invention provides a method of measuring I-Q mismatch in a system having a transmitter. The transmitter comprises an in-phase up-converter, a quadrature-phase up-converter, and a power detector. The method of measuring I-Q mismatch comprises measuring an in-phase transmit power at the power detector caused by transmitting an in-phase output signal to the in-phase up-converter, measuring a quadrature-phase transmit power at the power detector caused by transmitting a quadrature-phase output signal to the quadrature-phase up-converter, calculating a transmitter-gain-mismatch as a function of the in-phase transmit power and the quadrature-phase transmit power, measuring an I-Q transmit power at the power detector caused by simultaneously transmitting a gain-mismatch-compensated in-phase output signal to the in-phase up-converter and a gain-mismatch-compensated quadrature-phase output signal to the quadrature-phase up-converter, and calculating a transmitter-phase-mismatch as a function of the I-Q transmit power.
    • 本发明的示例性实施例提供了一种在具有发射机的系统中测量I-Q失配的方法。 发射机包括同相上变频器,正交相位上变频器和功率检测器。 测量IQ失配的方法包括:通过将同相输出信号发送到同相上变频器来测量在功率检测器处的​​同相发射功率,测量由发射引起的功率检测器处的​​正交相位发射功率 向正交相位上变频器的正交相输出信号,计算作为同相发射功率和正交相位发射功率的函数的发射机 - 增益失配,测量功率检测器处的​​IQ发射功率, 通过同步地向同相上变频器发送增益失配补偿的同相输出信号,并将增益失配补偿的正交相位输出信号发送到正交上变频器,并且计算发射机 - 作为IQ发射功率的函数的失配。
    • 8. 发明申请
    • SYSTEMS AND METHODS FOR DISTORTION MEASUREMENT USING DISTORTION-TO-AMPLITUDE TRANSFORMATIONS
    • 使用失真到幅度变换的失真测量的系统和方法
    • US20110102080A1
    • 2011-05-05
    • US12917386
    • 2010-11-01
    • Abhijit ChatterjeeShreyas SenShyam Kumar Devarakond
    • Abhijit ChatterjeeShreyas SenShyam Kumar Devarakond
    • H03F1/26
    • H03F3/193
    • The presently invention is directed to ways to measure distortion effects while allowing for the possibility of significant reduction in test cost. An exemplary embodiment of the present invention provides a method for amplifier distortion measurement including comparing a first amplitude response of an output signal from a power amplifier to a second amplitude response of a reference input signal to determine a set of Amplitude-to-Amplitude (“AM-AM”) distortion values. Additionally, the method for amplifier distortion measurement includes equalizing the first amplitude response of the output signal to match the second amplitude response of the reference input signal based on the set of AM-AM distortion values and creating a difference signal based on a comparison of the equalized output signal to the reference input signal. Furthermore, the method for amplifier distortion measurement includes calculating a set of Amplitude-to-Phase (“AM-PM”) distortion values based on a third amplitude response of the difference signal.
    • 本发明旨在测量失真效应,同时允许显着降低测试成本的可能性。 本发明的示例性实施例提供了一种用于放大器失真测量的方法,包括将来自功率放大器的输出信号的第一幅度响应与参考输入信号的第二幅度响应进行比较,以确定幅度 - 幅度(“ AM-AM“)失真值。 此外,用于放大器失真测量的方法包括基于AM-AM失真值的集合来均衡输出信号的第一幅度响应以匹配参考输入信号的第二幅度响应,并且基于AM-AM失真值的组合创建差分信号 将输出信号均衡到参考输入信号。 此外,放大器失真测量的方法包括基于差分信号的第三幅度响应来计算一组幅度相位(“AM-PM”)失真值。