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41. 发明授权

US08385464B2 Methods and apparatus for reducing average-to-minimum power ratio in communications signals 有权
标题翻译：降低通信信号中平均功率与最小功率比的方法和装置
公开(公告)号：US08385464B2
公开(公告)日：2013-02-26
申请号：US12482913
申请日：2009-06-11
申请人： Paul Cheng-Po Liang , Hua Wang , Kenichi Mori
发明人： Paul Cheng-Po Liang , Hua Wang , Kenichi Mori
IPC分类号： H04K1/02 , H04L25/03 , H04L25/49
CPC分类号： H04L27/363 , H03F1/3241 , H03F3/24 , H04L27/361
摘要： A baseband circuit for a communications transmitter includes a baseband modulator, a pulse-shaping filter, and an AMPR reduction circuit. The baseband modulator is configured to generate a sequence of symbols formatted in accordance with a non-constant envelope modulation scheme. The pulse-shaping filter is configured to band-limit the sequence of samples to provide a sequence of samples. The AMPR reduction circuit is configured to analyze and modify one or more samples in the sequence of samples, if a sample in the sequence of samples that has been previously analyzed by the AMPR reduction circuit is determined to have a magnitude less than a predetermined low-magnitude threshold.
摘要翻译：用于通信发射机的基带电路包括基带调制器，脉冲整形滤波器和AMPR降低电路。基带调制器被配置为生成根据非恒定包络调制方案格式化的符号序列。脉冲整形滤波器被配置为限制样本序列以提供样本序列。 AMPR降低电路被配置为分析和修改样本序列中的一个或多个样本，如果已经由AMPR降低电路先前分析的样本序列中的样本被确定为具有小于预定低通滤波器的幅度，幅度阈值。

42. 发明授权

US08140030B2 Adaptive impedance converter adaptively controls load impedance 有权
标题翻译：自适应阻抗转换器自适应地控制负载阻抗
公开(公告)号：US08140030B2
公开(公告)日：2012-03-20
申请号：US12209981
申请日：2008-09-12
申请人： Koji Takinami , Paul Cheng-Po Liang
发明人： Koji Takinami , Paul Cheng-Po Liang
IPC分类号： H04B1/02 , H04B1/04 , H01Q11/12
CPC分类号： H04B1/0458 , H03F1/0222 , H03F3/19 , H03F3/211 , H03F3/24 , H03F2200/451 , H03F2200/541 , H03G3/3042 , H04B1/0475
摘要： A transmitter generates first and second constant-envelope radio frequency (RF) component signals having first and second phase angles. The first and second phases are controlled by a phase controller. First and second nonlinear power amplifiers (PAs) are modulated by an amplitude-modulated power supply signal as the first and second constant-envelope RF component signals are amplified. The phase controller controls the first and second phases of the first and second constant-envelope RF component signals, in response to a power control signal, and, in so doing, controls an effective load impedance seen at the outputs of the first and second nonlinear PAs. By controlling the effective load impedance in response to a power control signal, rather than in response to rapid amplitude variations in an input signal envelope, the output power of the transmitter is efficiently controlled over a wide dynamic range even at low output powers.
摘要翻译：发射机产生具有第一和第二相位角的第一和第二恒定包络射频（RF）分量信号。第一和第二相由相位控制器控制。当第一和第二恒定包络RF分量信号被放大时，第一和第二非线性功率放大器（PA）由幅度调制电源信号调制。相位控制器响应于功率控制信号控制第一和第二恒定包络RF分量信号的第一和第二相位，并且这样做控制在第一和第二非线性信号的输出处看到的有效负载阻抗 PA。通过响应于功率控制信号来控制有效负载阻抗，而不是响应于输入信号包络中的快速幅度变化，即使在低输出功率下，发射机的输出功率也能在宽动态范围内被有效地控制。

43. 发明授权

US08131234B2 Transmitter utilizing a duty cycle envelope reduction and restoration modulator 有权
标题翻译：发射机利用占空比包络减少和恢复调制器
公开(公告)号：US08131234B2
公开(公告)日：2012-03-06
申请号：US12508464
申请日：2009-07-23
申请人： Paul Cheng-Po Liang , Koji Takinami , Toru Matsuura
发明人： Paul Cheng-Po Liang , Koji Takinami , Toru Matsuura
IPC分类号： H01Q11/12 , H04B1/04
CPC分类号： H03F1/0227 , H03F1/02 , H03F3/189 , H03F3/24 , H03F2200/336 , H03F2200/351 , H04B2001/045
摘要： A broad power band transmitter utilizing a duty cycle modulator achieves 80dB of power range for 3G signals. The present invention greatly improves the efficiency of transmitters used in mobile phones, for example, by using the duty cycle modulator during medium and low power levels of the transmitting power amplifier. The power amplifier operates in three different modes based upon the amplifier power level selected. The power amplifier operates in an EER mode during high power levels, in a DCM ERR mode during medium power levels, and in a DCM mode during low power levels.
摘要翻译：利用占空比调制器的宽带功率带发射机实现3G信号的80dB的功率范围。本发明大大提高了在移动电话中使用的发射机的效率，例如通过在发射功率放大器的中等和低功率电平期间使用占空比调制器。功率放大器基于选择的放大器功率电平在三种不同的模式下工作。功率放大器在高功率电平下处于EER模式，在中等功率电平下处于DCM ERR模式，在低功率级下处于DCM模式。

44. 发明授权

US07949316B2 High-efficiency envelope tracking systems and methods for radio frequency power amplifiers 有权
标题翻译：射频功率放大器的高效率包络跟踪系统和方法
公开(公告)号：US07949316B2
公开(公告)日：2011-05-24
申请号：US12022141
申请日：2008-01-29
申请人： Koji Takinami , Paul Cheng-Po Liang
发明人： Koji Takinami , Paul Cheng-Po Liang
IPC分类号： H01Q11/12 , H04B1/04
CPC分类号： H03G3/004 , H02M2001/0045 , H03F1/0227
摘要： Envelope tracking (ET) methods and systems for controlling the delivery of power to radio frequency power amplifiers (RFPAs). An exemplary ET system includes an RFPA and a wide bandwidth capable and power efficient envelope modulator that includes a first power supplying apparatus and a second power supplying apparatus. The first power supplying apparatus includes a switch-mode converter and a regulator. The first mode converter is operable to dynamically step down a fixed power supply voltage according to amplitude variations in an envelope signal received by the regulator, and use the resulting dynamic power supply signal to power the regulator. The second power supplying apparatus is connected in parallel with the first power supplying apparatus. Depending on a power of an output signal to be generated at an output of the power amplifier, power is supplied to the power amplifier from either or both of the first and second power supplying apparatuses.
摘要翻译：用于控制向射频功率放大器（RFPA）供电的信封跟踪（ET）方法和系统。示例性ET系统包括RFPA和具有宽带宽功能和功率效率的包络调制器，其包括第一供电装置和第二供电装置。第一供电装置包括开关模式转换器和调节器。第一模式转换器可操作以根据由调节器接收的包络信号中的幅度变化来动态地降低固定电源电压，并使用所得到的动态电源信号为调节器供电。第二供电装置与第一供电装置并联连接。取决于在功率放大器的输出处产生的输出信号的功率，从第一和第二供电装置中的一个或两个供电装置向功率放大器供电。

45. 发明授权

US07907023B2 Phase lock loop with a multiphase oscillator 有权
标题翻译：具有多相振荡器的锁相环
公开(公告)号：US07907023B2
公开(公告)日：2011-03-15
申请号：US12475211
申请日：2009-05-29
申请人： Paul Cheng-Po Liang , Koji Takinami
发明人： Paul Cheng-Po Liang , Koji Takinami
IPC分类号： H03L7/099
CPC分类号： H03L7/0995 , H03L7/1806 , H03L7/183 , H03L2207/50
摘要： A phase lock loop utilizes a multiphase oscillator having a plurality of digital inputs. A plurality of DQ flip-flops, offset in time from each other generate a plurality of control signals to remove control phase information from the oscillator in digital form. A DQ flip-flop connected between any two digital inputs on the oscillator determines direction of the traveling wave. The direction and phase information address a look-up table to determine the current fractional phase of the oscillator. A divide by N circuit is used to reduce the oscillator frequency. A total phase indicator signal for the oscillator is determined using the current fractional phase. The total phase is compared to a reference phase to produce a control signal for making adjustments to the oscillator. In a feed-forward path, frequency dividers divide a high frequency signal from the oscillator to a lower desired frequency, thereby increasing phase resolution.
摘要翻译：锁相环利用具有多个数字输入的多相振荡器。在时间上偏移的多个DQ触发器产生多个控制信号，以数字形式从振荡器中去除控制相位信息。连接在振荡器上的任何两个数字输入之间的DQ触发器决定行波的方向。方向和相位信息寻址查找表以确定振荡器的当前分数相位。使用N电路的除法来减少振荡器频率。使用当前的分数阶段确定振荡器的总相位指示信号。将总相位与参考相位进行比较，以产生用于调整振荡器的控制信号。在前馈路径中，分频器将高频信号从振荡器分频到较低的期望频率，从而提高相位分辨率。

46. 发明申请

US20100303135A1 METHOD AND APPARATUS FOR DIRECT RF TO DIGITAL CONVERTER 审中-公开
标题翻译：用于直接RF到数字转换器的方法和装置
公开(公告)号：US20100303135A1
公开(公告)日：2010-12-02
申请号：US12474178
申请日：2009-05-28
申请人： Paul Cheng-Po Liang , Koji Takinami
发明人： Paul Cheng-Po Liang , Koji Takinami
IPC分类号： H04B1/38 , H04L27/00 , H04L27/06
CPC分类号： H04L27/0002 , G01R23/02 , H03D3/001
摘要： The invention relates to a method and apparatus for decomposing a high frequency incoming signal into several low frequency signals without the loss of any information. The low frequency signals can define a plurality of digital data streams. The decomposing steps are implemented without processing the signal through a mixer or a local oscillator and without degrading the SNR. In a preferred embodiment, a decomposing circuit includes a single-to-differential converter for decomposing the incoming high frequency signal into a first and a second signal having opposite polarity. Each of the first and the second incoming signals is then processed through multistage cascading logic units which reduce the frequency of the respective signals to provide a plurality of low-frequency data streams. The resulting slow-speed data streams are combined to form a low-speed data stream containing all the information provided by the original high-frequency signal.
摘要翻译：本发明涉及一种将高频输入信号分解成若干低频信号而不损失任何信息的方法和装置。低频信号可以定义多个数字数据流。在不通过混频器或本地振荡器处理信号而不降低SNR的情况下实现分解步骤。在优选实施例中，分解电路包括用于将输入的高频信号分解成具有相反极性的第一和第二信号的单差分转换器。然后通过多级级联逻辑单元来处理第一和第二输入信号中的每一个，这些单元降低各个信号的频率以提供多个低频数据流。所得到的慢速数据流被组合以形成包含由原始高频信号提供的所有信息的低速数据流。

47. 发明授权

US07675993B2 Reduction of average-to-minimum power ratio in communications signals 失效
标题翻译：降低通信信号中的平均功率与最小功率比
公开(公告)号：US07675993B2
公开(公告)日：2010-03-09
申请号：US11442488
申请日：2006-05-26
申请人： Richard W. D. Booth , Stephan V. Schell , Thomas E. Biedka , Paul Cheng-Po Liang
发明人： Richard W. D. Booth , Stephan V. Schell , Thomas E. Biedka , Paul Cheng-Po Liang
IPC分类号： H04L27/00
CPC分类号： H04L25/03866
摘要： This invention, generally speaking, modifies pulse amplitude modulated signals to reduce the ratio of average power to minimum power. The signal is modified in such a manner that the signal quality remains acceptable. The signal quality is described in terms of the Power Spectral Density (PSD) and the Error Vector Magnitude (EVM).
摘要翻译：本发明一般地说是修改脉冲幅度调制信号以减小平均功率与最小功率的比值。信号被修改为使得信号质量保持可接受的方式。根据功率谱密度（PSD）和误差矢量幅度（EVM）来描述信号质量。

48. 发明申请

US20100056068A1 MULTI-MODE TRANSMITTER HAVING ADAPTIVE OPERATING MODE CONTROL 有权
标题翻译：具有自适应操作模式控制的多模式发射器
公开(公告)号：US20100056068A1
公开(公告)日：2010-03-04
申请号：US12203361
申请日：2008-09-03
申请人： Koji Takinami , Paul Cheng-Po Liang
发明人： Koji Takinami , Paul Cheng-Po Liang
IPC分类号： H04B1/38
CPC分类号： H04B1/38 , H03F1/02 , H03F3/24 , H04B1/0057 , H04B2001/045
摘要： Methods and apparatus for transmitting communications signals that are both power efficient and effective at avoiding or reducing transmitter-generated receive band noise. An exemplary transceiver apparatus includes a multi-mode transmitter that is configurable to operate in a plurality of operating modes (e.g., a polar mode, a quadrature mode and a hybrid mode), a receiver, and an operating mode controller. The operating mode controller is configured to control which operating mode the transmitter is to operate, depending on one or more of a transmit (Tx) power, receive (Rx) power, the Tx power relative to the Rx power, a level of frequency separation between a Tx frequency band and a Rx frequency band (Tx/Rx band separation), and modulation type employed by the transmitter.
摘要翻译：用于发送通信信号的方法和装置，其功率有效且有效地避免或减少发射机产生的接收频带噪声。示例性收发器装置包括可配置为以多种操作模式（例如，极坐标模式，正交模式和混合模式），接收器和操作模式控制器操作的多模式发射器。操作模式控制器被配置为根据发射（Tx）功率，接收（Rx）功率，相对于Rx功率的Tx功率，频率分离水平中的一个或多个来控制发射机将要操作的操作模式在Tx频带和Rx频带之间（Tx / Rx频带分离）以及由发射机使用的调制类型。

49. 发明申请

US20090289720A1 High-Efficiency Envelope Tracking Systems and Methods for Radio Frequency Power Amplifiers 有权
标题翻译：射频功率放大器的高效率信封跟踪系统和方法
公开(公告)号：US20090289720A1
公开(公告)日：2009-11-26
申请号：US12126475
申请日：2008-05-23
申请人： Koji Takinami , Paul Cheng-Po Liang
发明人： Koji Takinami , Paul Cheng-Po Liang
IPC分类号： H03F3/04 , G05F1/46
CPC分类号： G05F1/565 , H02M2001/0045 , H03F1/0222 , H03F3/195 , H03F3/24 , H03F2200/451 , H03F2200/456 , H03F2200/462 , H03F2200/481
摘要： High-efficiency envelope tracking (ET) methods and apparatus for dynamically controlling power supplied to radio frequency power amplifiers (RFPAs). An exemplary ET circuit includes a switch-mode converter coupled in parallel with a split-path linear regulator. The switch-mode converter is configured to generally track an input envelope signal Venv and supply the current needs of a load (e.g., an RFPA). The split-path linear regulator compensates for inaccurate envelope tracking by sourcing or sinking current to the load via a main current path. A current sense path connected in parallel with the main current path includes a current sense resistor used by a hysteresis comparator to control the switching of the switch-mode converter. The split-path linear regulator is configured so that current flowing in the current sense path is a lower, scaled version of the current flowing in the main current path.
摘要翻译：用于动态控制提供给射频功率放大器（RFPA）的功率的高效率包络跟踪（ET）方法和装置。示例性ET电路包括与分离路径线性调节器并联耦合的开关模式转换器。开关模式转换器被配置为通常跟踪输入包络信号Venv并提供负载（例如，RFPA）的当前需求。分路通路线性调节器通过通过主电流路径将电流供给或吸收负载来补偿不准确的包络跟踪。与主电流路径并联连接的电流检测路径包括由滞环比较器使用的电流检测电阻器来控制开关模式转换器的开关。分路线性调节器被配置为使得在电流感测路径中流动的电流是在主电流路径中流动的电流的较低的缩放版本。

50. 发明授权

US07557671B2 Real time VCO gain non linearity calibration 有权
标题翻译：实时VCO获得非线性校准
公开(公告)号：US07557671B2
公开(公告)日：2009-07-07
申请号：US11704881
申请日：2007-02-08
申请人： Paul Cheng-Po Liang
发明人： Paul Cheng-Po Liang
IPC分类号： H03C3/08
CPC分类号： H03C3/0966 , H03C3/0991 , H03L7/08 , H03L2207/06
摘要： A method of determining a gain nonlinearity receives a phase difference and generates an output frequency based on the received phase difference. The method reconstructs a waveform by using the output frequency. The method preprocesses the phase difference to generate a comparison waveform. The method compares the reconstructed waveform to the comparison waveform and determines a gain nonlinearity based on the comparison between the reconstructed and comparison waveforms. A modulation system includes a voltage controlled oscillator for receiving an input signal based on a phase difference and generating an output frequency. The system further includes a waveform reconstructor and a comparator. The waveform reconstructor is coupled to the voltage controlled oscillator, and is for reconstructing a waveform based on the output frequency. The comparator is coupled to the waveform reconstructor, and is for comparing the output of the waveform reconstructor with the input signal. The comparator is configured for determining a gain nonlinearity exhibited by the voltage controlled oscillator. Particular embodiments further include a compensator.
摘要翻译：确定增益非线性的方法接收相位差，并基于接收的相位差产生输出频率。该方法通过使用输出频率重建波形。该方法预处理相位差以产生比较波形。该方法将重建波形与比较波形进行比较，并基于重构和比较波形之间的比较确定增益非线性。调制系统包括压控振荡器，用于基于相位差接收输入信号并产生输出频率。该系统还包括波形重构器和比较器。波形重建器耦合到压控振荡器，并用于基于输出频率重建波形。比较器耦合到波形重建器，用于将波形重构器的输出与输入信号进行比较。比较器被配置用于确定由压控振荡器显示的增益非线性。具体实施例还包括补偿器。

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