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    • 74. 发明授权
    • Method and apparatus for use of space time trellis codes based on channel phase feedback
    • 基于信道相位反馈的空时格码编码方法和装置
    • US07599419B2
    • 2009-10-06
    • US11332019
    • 2006-01-12
    • Hamid JafarkhaniLi Liu
    • Hamid JafarkhaniLi Liu
    • H04B1/00
    • H04B7/0626B63B35/03H04B7/0669H04L1/0026H04L1/006H04L1/0065H04L1/0662H04L1/0681H04L1/0693
    • A method for multiple-input-multiple-output (MIMO) wireless communication comprises the steps of generating inner and outer codes based on channel state information available at a transmitter and concatenating different inner codes with different outer codes; and using the generated concatenated inner and outer codes for wireless communication. The inner and outer codes are based on channel phase information at the transmitter or channel feedback. High-performance trellis codes or block codes for use in cellular networks are illustratively described. The space-time trellis codes are generated by set partitioning on a plurality of classes of signal designs to generate a series of inner codes, each of the series of inner codes being optimized by channel phase feedback, and concatenating each inner code with a multiple trellis coded modulated outer code to provide a complete space-time trellis code as a cophase space-time trellis code.
    • 一种用于多输入多输出(MIMO)无线通信的方法包括以下步骤:基于在发射机处可用的信道状态信息产生内部和外部码,并且将不同的内部码与不同的外部码相连; 并使用生成的级联的内部和外部代码进行无线通信。 内部和外部代码基于发射机或信道反馈的信道相位信息。 说明性地描述了用于蜂窝网络的高性能网格码或块码。 时空网格码通过在多个信号设计类别上的集合划分来生成,以生成一系列内部码,每个内部码的一系列通过信道相位反馈进行优化​​,并且将每个内部码与多个网格连接起来 编码调制外码,以提供完整的时空格码作为同相时空网格码。
    • 76. 发明申请
    • METHOD AND APPARATUS FOR REDUCING INTERMODULATION DISTORTION IN AN ELECTRONIC DEVICE HAVING AN AMPLIFIER CIRCUIT
    • 用于减小具有放大器电路的电子设备中的互调失真的方法和装置
    • US20090189691A1
    • 2009-07-30
    • US12021061
    • 2008-01-28
    • Junxiong DengLi LiuPrasad S. Gudem
    • Junxiong DengLi LiuPrasad S. Gudem
    • H03F1/26
    • H03F3/193H03F1/223H03F1/3205H03F1/34H03F2200/294H03F2201/3206
    • An electronic device includes an amplifier circuit coupled to a linearizer. The amplifier circuit may receive a first input signal including first and second frequencies and generate a first output signal including a delta frequency signal at a delta frequency, which is the difference between the first frequency and the second frequency. The linearizer includes a signal detector circuit, a current-mirror circuit, a low pass filter, a phase shifter, and a bias circuit. The signal detector circuit may generate a second output signal. The current-mirror circuit may adjust an amplitude of a signal. The low pass filter may eliminate a portion of the second output signal having frequencies greater than the delta frequency. The phase shifter may generate a feedback signal corresponding to the delta frequency signal. An amplitude and/or a phase of the feedback signal is different from an amplitude and/or a phase of the delta frequency signal.
    • 电子设备包括耦合到线性化器的放大器电路。 放大器电路可以接收包括第一和第二频率的第一输入信号,并产生第一输出信号,该第一输出信号包括第一频率和第二频率之间的差异的增量频率的增量频率信号。 线性化器包括信号检测器电路,电流镜电路,低通滤波器,移相器和偏置电路。 信号检测器电路可以产生第二输出信号。 电流镜电路可以调节信号的幅度。 低通滤波器可以消除具有大于Δ频率的频率的第二输出信号的一部分。 移相器可以产生对应于Δ频率信号的反馈信号。 反馈信号的幅度和/或相位与增量频率信号的振幅和/或相位不同。
    • 77. 发明授权
    • Scanning imager employing multiple chips with staggered pixels
    • 扫描成像仪采用具有交错像素的多个芯片
    • US07554067B2
    • 2009-06-30
    • US11589357
    • 2006-10-30
    • Jeffrey J. ZarnowskiKetan V. KariaMichael JoynerThomas PoonnenLi Liu
    • Jeffrey J. ZarnowskiKetan V. KariaMichael JoynerThomas PoonnenLi Liu
    • H01L27/00H04N3/14
    • H04N5/2254H01L27/14603H01L27/14621H01L27/14627H04N1/1911H04N1/1917H04N5/3692H04N9/045H04N2201/0081
    • A solid state imaging system has at least one CMOS imager with first and second series of pixels in which the pixels of one series are offset, i.e., staggered, in respect to the pixels of the other series. Multiple imagers can be arrayed end to end, with jumper wires connecting the pixel output conductors or each so that the pixels feed into a common output amplifier for each series, to minimize chip to chip offset voltages. The pixels may be diagonally offset from one another, and a color imager can be constructed in which color ribbon filters are arranged diagonally across the imaging area. This arrangement minimizes color cross talk. An array of microlenses is situated with each microlens covering a plurality of the pixels. The different pixels under each microlens can be aligned along a diagonal. The different pixels under the same microlens can have different integration times, to increase the dynamic range of the imager(s).
    • 固态成像系统具有至少一个具有第一和第二系列像素的CMOS成像器,其中一系列的像素相对于另一系列的像素偏移,即交错。 多个成像器可以端对端排列,跨接线连接像素输出导体或每个像素,以便像素馈送到每个系列的公共输出放大器,以最小化芯片到芯片的偏移电压。 像素可以彼此对角地偏移,并且可以构造彩色成像器,其中色带滤光器对角地布置在成像区域上。 这种布置使颜色串扰最小化。 位于微透镜阵列中,每个微透镜覆盖多个像素。 每个微透镜下的不同像素可以沿对角线对齐。 相同微透镜下的不同像素可以具有不同的积分时间,以增加成像器的动态范围。
    • 79. 发明授权
    • Apparatus and method for a system architecture for multiple antenna wireless communication systems using round robin channel estimation and transmit beam forming algorithms
    • 用于使用轮询信道估计和发射波束形成算法的多天线无线通信系统的系统架构的装置和方法
    • US07539458B2
    • 2009-05-26
    • US11584831
    • 2006-10-23
    • Hamid JafarkhaniLi Liu
    • Hamid JafarkhaniLi Liu
    • H04B1/00H04B15/00
    • H04B7/0617H04B7/0626
    • A multiple antenna wireless system including a transmitter and a receiver comprises a reconfigurable large antenna array having a plurality of antennas. A plurality of RF chains in the transmitter is coupled to the reconfigurable large antenna array. A pilot assisted round robin channel estimation means tracks the fading channel; and an adaptive round robin transmit beamforming means beam forms the reconfigurable large antenna array. A method for multiple antenna wireless communication comprising the steps of tracking a plurality of fading channels in a reconfigurable large antenna array having a plurality of antennas using pilot assisted round robin channel estimation to selectively couple a plurality of RF chains in the transmitter to the reconfigurable large antenna array, and adaptively, round-robin transmit beamforming the reconfigurable large antenna array.
    • 包括发射机和接收机的多天线无线系统包括具有多个天线的可重构大天线阵列。 发射机中的多个RF链耦合到可重新配置的大天线阵列。 导频辅助循环信道估计装置跟踪衰落信道; 并且自适应轮询发射波束成形装置波束形成可重构大天线阵列。 一种用于多天线无线通信的方法,包括以下步骤:使用导频辅助循环信道估计来跟踪具有多个天线的可重构大型天线阵列中的多个衰落信道,以选择性地将发射机中的多个RF链耦合到可重新配置的大的 天线阵列,以及自适应地轮循发射波束成形可重构大天线阵列。