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    • 2. 发明授权
    • Transmitter characterization for digital pre-distortion using offset preamble subcarriers
    • 使用偏移前导码副载波进行数字预失真的发射机特性
    • US08218677B2
    • 2012-07-10
    • US12396171
    • 2009-03-02
    • Hang JinJohn GrabnerDaniel WeeBror Peterson
    • Hang JinJohn GrabnerDaniel WeeBror Peterson
    • H04L25/49
    • H04L27/368H04L27/2626
    • Techniques are provided to pre-distort a signal that is transmitted by a transmitter of a wireless communication device, e.g., a device configured for wireless radio frequency communication. The transmitter of the device inherently introduces distortion to the baseband signal to be transmitted. In at least one frame of a baseband signal to be transmitted, at least one subcarrier in a preamble of the frame is shifted in frequency such that the at least one subcarrier is offset from a normal subcarrier frequency position. The at least one frame of the baseband signal is supplied to the transmitter that is configured to produce a transmit signal for transmission. The transmit signal at an output of the transmitter is sampled or detected and inter-modulation distortion in the transmit signal is determined at one or more frequencies as a result of shifting of the frequency of the at least one subcarrier in the preamble of the at least one frame. The baseband signal is pre-distorted based on the inter-modulation distortion prior to coupling to the transmitter for transmission.
    • 提供技术来预先失真由无线通信设备的发射机发射的信号,例如被配置用于无线射频通信的设备。 设备的发射机固有地将失真引入要发射的基带信号。 在要发送的基带信号的至少一帧中,帧的前导码中的至少一个副载波的频率偏移,使得至少一个副载波偏离正常子载波频率位置。 基带信号的至少一帧被提供给被配置为产生用于传输的发射信号的发射机。 在发送器的输出处的发送信号被采样或检测,并且在一个或多个频率上确定发送信号中的互调失真,作为至少一个子帧的至少一个子载波的频率的移位的结果 一帧。 基带信号在耦合到发射机之前基于互调失真被预失真以进行传输。
    • 6. 发明申请
    • Transmitter Characterization for Digital Pre-Distortion Using Offset Preamble Subcarriers
    • 使用偏移前导子载波进行数字预失真的发射机特性
    • US20100220810A1
    • 2010-09-02
    • US12396171
    • 2009-03-02
    • Hang JinJohn GrabnerDaniel WeeBror Peterson
    • Hang JinJohn GrabnerDaniel WeeBror Peterson
    • H04L25/49
    • H04L27/368H04L27/2626
    • Techniques are provided to pre-distort a signal that is transmitted by a transmitter of a wireless communication device, e.g., a device configured for wireless radio frequency communication. The transmitter of the device inherently introduces distortion to the baseband signal to be transmitted. In at least one frame of a baseband signal to be transmitted, at least one subcarrier in a preamble of the frame is shifted in frequency such that the at least one subcarrier is offset from a normal subcarrier frequency position. The at least one frame of the baseband signal is supplied to the transmitter that is configured to produce a transmit signal for transmission. The transmit signal at an output of the transmitter is sampled or detected and inter-modulation distortion in the transmit signal is determined at one or more frequencies as a result of shifting of the frequency of the at least one subcarrier in the preamble of the at least one frame. The baseband signal is pre-distorted based on the inter-modulation distortion prior to coupling to the transmitter for transmission.
    • 提供技术来预先失真由无线通信设备的发射机发射的信号,例如被配置用于无线射频通信的设备。 设备的发射机固有地将失真引入要发射的基带信号。 在要发送的基带信号的至少一帧中,帧的前导码中的至少一个副载波的频率偏移,使得至少一个副载波偏离正常子载波频率位置。 基带信号的至少一帧被提供给被配置为产生用于传输的发射信号的发射机。 在发送器的输出处的发送信号被采样或检测,并且在一个或多个频率上确定发送信号中的互调失真,作为至少一个子帧的至少一个子载波的频率的移位的结果 一帧。 基带信号在耦合到发射机之前基于互调失真被预失真以进行传输。
    • 8. 发明授权
    • Proactive gain control system for communications receivers
    • 通信接收机主动增益控制系统
    • US07127223B2
    • 2006-10-24
    • US11189941
    • 2005-07-26
    • Hang JinJohn GrabnerJun HuangDaniel Wee Teck Ho
    • Hang JinJohn GrabnerJun HuangDaniel Wee Teck Ho
    • H04B1/06
    • H03G3/3052H03G2201/103H03G2201/204H03G2201/305H03G2201/706
    • The present invention discloses a proactive gain control system for a communications receiver. The proactive gain control system includes a variable gain module for outputting an output signal in response to an input signal. A detector detects the output signal and outputs a detection signal representing a signal strength of the output signal. A traffic monitor monitors the output signal and outputs a traffic profile signal indicating that a traffic profile for the input signal will change. A gain computing module outputs a gain adjustment value in response to the detection signal and the traffic profile signal. A gain control module outputs a gain control signal to the variable gain module, which determines a gain between the input and output signals, in response to the gain adjustment value.
    • 本发明公开了一种用于通信接收机的主动增益控制系统。 主动增益控制系统包括用于响应于输入信号输出输出信号的可变增益模块。 检测器检测输出信号并输出​​表示输出信号的信号强度的检测信号。 流量监视器监视输出信号并输出​​指示用于输入信号的流量曲线将改变的流量分布信号。 增益计算模块响应于检测信号和流量分布信号输出增益调整值。 增益控制模块响应于增益调整值,向可变增益模块输出增益控制信号,该可变增益模块确定输入和输出信号之间的增益。