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    Systems and methods for determining sensing thresholds of a multi-resolution spectrum sensing (MRSS) technique for cognitive radio (CR) systems
    3.
    发明授权
    Systems and methods for determining sensing thresholds of a multi-resolution spectrum sensing (MRSS) technique for cognitive radio (CR) systems 有权
    用于确定用于认知无线电（CR）系统的多分辨率频谱感测（MRSS）技术的感测阈值的系统和方法

    公开(公告)号：US07768252B2

    公开(公告)日：2010-08-03

    申请号：US12034570

    申请日：2008-02-20

    申请人： Jongmin Park ,  Kyutae Lim ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    发明人： Jongmin Park ,  Kyutae Lim ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    IPC分类号： G01R23/00

    CPC分类号： H04W8/005 ,  H04W16/14 ,  H04W16/22

    摘要： Systems and methods may be provided for threshold determinations for spectrum sensing. The systems and methods may include receiving a false alarm rate, where the false alarm rate is associated with false occupancy identifications of a spectrum segment, determining a noise floor as a function of a noise figure and characteristics of a multi-resolution spectrum sensing (MRSS) window, and calculating a sensing threshold based at least in part upon the false alarm rate and the noise floor. The systems and methods may also include determining whether a portion of an RF spectrum is occupied based at least in part on the calculated sensing threshold.

    摘要翻译： 可以提供用于频谱感测的阈值确定的系统和方法。 系统和方法可以包括接收误报率，其中误报率与频谱段的假占用标识相关联，确定作为噪声系数和多分辨率频谱感测特性（MRSS）的函数的本底噪声 ）窗口，并且至少部分地基于所述误报率和所述本底噪声来计算感测阈值。 系统和方法还可以包括至少部分地基于所计算的感测阈值来确定RF频谱的一部分是否被占用。

    LC quadrature oscillator having phase and amplitude mismatch compensator
    4.
    发明授权
    LC quadrature oscillator having phase and amplitude mismatch compensator 失效
    具有相位和幅度失配补偿器的LC正交振荡器

    公开(公告)号：US07595700B2

    公开(公告)日：2009-09-29

    申请号：US11859523

    申请日：2007-09-21

    申请人： Sangjin Byun ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    发明人： Sangjin Byun ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    IPC分类号： H03B5/12

    CPC分类号： H03B27/00 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B2200/0078

    摘要： Embodiments of the invention may provide for an LC quadrature oscillator that includes two LC oscillators that are cross-coupled with each other to generate I/Q clock signals and a phase and amplitude mismatch compensator. The phase and amplitude mismatch detector may include an amplitude mismatch detector, a transconductor, and a capacitor for compensating for both phase and amplitude mismatches between I/Q clock signals generated in the LC quadrature oscillator.

    摘要翻译： 本发明的实施例可以提供一种LC正交振荡器，其包括彼此交叉耦合以产生I / Q时钟信​​号的两个LC振荡器以及相位和幅度失配补偿器。 相位和幅度失配检测器可以包括幅度失配检测器，跨导体和用于补偿在LC正交振荡器中产生的I / Q时钟信​​号之间的相位和幅度失配的电容器。

    LC QUADRATURE OSCILLATOR HAVING PHASE AND AMPLITUDE MISMATCH COMPENSATOR
    5.
    发明申请
    LC QUADRATURE OSCILLATOR HAVING PHASE AND AMPLITUDE MISMATCH COMPENSATOR 失效
    具有相位和幅度误差补偿器的LC QUADRATURE振荡器

    公开(公告)号：US20090079509A1

    公开(公告)日：2009-03-26

    申请号：US11859523

    申请日：2007-09-21

    申请人： Sangjin Byun ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    发明人： Sangjin Byun ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    IPC分类号： H03B5/18 ,  H03K3/03

    CPC分类号： H03B27/00 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B2200/0078

    摘要： Embodiments of the invention may provide for an LC quadrature oscillator that includes two LC oscillators that are cross-coupled with each other to generate I/Q clock signals and a phase and amplitude mismatch compensator. The phase and amplitude mismatch detector may include an amplitude mismatch detectors a transconductor, and a capacitor for compensating for both phase and amplitude mismatches between I/Q clock signals generated in the LC quadrature oscillator.

    摘要翻译： 本发明的实施例可以提供一种LC正交振荡器，其包括彼此交叉耦合以产生I / Q时钟信​​号的两个LC振荡器以及相位和幅度失配补偿器。 相位和幅度失配检测器可以包括跨导体的幅度失配检测器和用于补偿在LC正交振荡器中产生的I / Q时钟信​​号之间的相位和幅度失配的电容器。

    FRACTIONAL RESOLUTION INTEGER-N FREQUENCY SYNTHESIZER
    6.
    发明申请
    FRACTIONAL RESOLUTION INTEGER-N FREQUENCY SYNTHESIZER 审中-公开
    分数分解整数N频率合成器

    公开(公告)号：US20100073052A1

    公开(公告)日：2010-03-25

    申请号：US12563790

    申请日：2009-09-21

    申请人： Jaehyouk Choi ,  Jongmin Park ,  Kyutae Lim ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    发明人： Jaehyouk Choi ,  Jongmin Park ,  Kyutae Lim ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    IPC分类号： H03L7/08

    CPC分类号： H03L7/185 ,  H03L7/0891 ,  H03L2207/10

    摘要： Embodiments of the invention may provide for a frequency synthesizer capable to generate an output signal in which the frequency is a fractional portion of the reference frequency without a fractional divider. Based on mathematical relationship (“relatively prime”) between the reference frequency and other injection frequencies mixed with the output signal of a voltage controlled oscillator, the synthesizer is able to generate signals evenly spaced in the frequency domain like Fractional-N PLLs. The synthesizer may include an Integer-N PLL, a SSB mixer, frequency dividers, and frequency multipliers. A Integer-N PLL may include a Phase and Frequency Detector, a Charge Pump, a Loop Filter and a Dual Modulus Divider. By not requiring a fractional divider, the frequency synthesizer is able to avoid adopting any compensation circuits such as Sigma-Delta modulator to suppress fractional spurs. Therefore, the chip area, power consumption and complexity will be reduced considerably.

    摘要翻译： 本发明的实施例可以提供能够产生输出信号的频率合成器，其中频率是参考频率的小数部分而没有分数分频器。 基于与压控振荡器的输出信号混合的参考频率和其他注入频率之间的数学关系（“相对主要”），合成器能够在频域中产生均匀间隔的信号，如分数N PLL。 合成器可以包括整数N PLL，SSB混频器，分频器和频率乘法器。 整数N PLL可以包括相位和频率检测器，电荷泵，环路滤波器和双模数分频器。 通过不需要分数分频器，频率合成器能够避免采用诸如Sigma-Delta调制器之类的任何补偿电路来抑制分数杂散。 因此，芯片面积，功耗和复杂度将大大降低。

    Systems, methods, and apparatuses for a long delay generation technique for spectrum-sensing of cognitive radios
    7.
    发明授权
    Systems, methods, and apparatuses for a long delay generation technique for spectrum-sensing of cognitive radios 失效
    用于认知无线电频谱感知的长延迟生成技术的系统，方法和装置

    公开(公告)号：US07528751B2

    公开(公告)日：2009-05-05

    申请号：US11778557

    申请日：2007-07-16

    申请人： Jongmin Park ,  Taejoong Song ,  Kyutae Lim ,  Chang-Ho Lee ,  Jeongsuk Lee ,  Kihong Kim ,  Seongsoo Lee ,  Haksun Kim ,  Joy Laskar

    发明人： Jongmin Park ,  Taejoong Song ,  Kyutae Lim ,  Chang-Ho Lee ,  Jeongsuk Lee ,  Kihong Kim ,  Seongsoo Lee ,  Haksun Kim ,  Joy Laskar

    IPC分类号： H03M1/00

    CPC分类号： H04B17/382

    摘要： Embodiments of the invention may provide for a long delay generator for the spectrum sensing of cognitive radio systems. The long delay generator may include an Analog-to-Digital Converter (ADC), memory element, and Digital-to-Analog Converter (DAC). The memory element may utilize shift register bank or Random-Access Memory (RAM) cells. The long delay generator may provide for a selectable delay by digitizing the received signal, delaying the received signal in the digital domain, and reconstructing the delayed signal as an analog. The analog delayed signal may then be compared or otherwise correlated with the original input signal using an analog auto-correlation technique to determine whether a meaningful signal type has been identified or otherwise detected.

    摘要翻译： 本发明的实施例可以提供用于认知无线电系统的频谱感测的长延迟发生器。 长延迟发生器可以包括模数转换器（ADC），存储器元件和数模转换器（DAC）。 存储器元件可以利用移位寄存器组或随机存取存储器（RAM）单元。 长延迟发生器可以通过数字化接收的信号，延迟数字域中的接收信号，并将延迟的信号重建为模拟来提供可选择的延迟。 然后可以使用模拟自相关技术将模拟延迟信号与原始输入信号进行比较或相关，以确定是否已识别或以其他方式检测到有意义的信号类型。

    Systems and methods for determining Sensing Thresholds of a Multi-Resolution Spectrum Sensing (MRSS) technique for Cognitive Radio (CR) Systems
    8.
    发明申请
    Systems and methods for determining Sensing Thresholds of a Multi-Resolution Spectrum Sensing (MRSS) technique for Cognitive Radio (CR) Systems 有权
    用于确定用于认知无线电（CR）系统的多分辨率频谱感测（MRSS）技术的感测阈值的系统和方法

    公开(公告)号：US20080214130A1

    公开(公告)日：2008-09-04

    申请号：US12034570

    申请日：2008-02-20

    申请人： Jongmin Park ,  Kyutae Lim ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    发明人： Jongmin Park ,  Kyutae Lim ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    IPC分类号： H04B1/18

    CPC分类号： H04W8/005 ,  H04W16/14 ,  H04W16/22

    摘要： Systems and methods may be provided for threshold determinations for spectrum sensing. The systems and methods may include receiving a false alarm rate, where the false alarm rate is associated with false occupancy identifications of a spectrum segment, determining a noise floor as a function of a noise figure and characteristics of a multi-resolution spectrum sensing (MRSS) window, and calculating a sensing threshold based at least in part upon the false alarm rate and the noise floor. The systems and methods may also include determining whether a portion of an RF spectrum is occupied based at least in part on the calculated sensing threshold.

    摘要翻译： 可以提供用于频谱感测的阈值确定的系统和方法。 系统和方法可以包括接收误报率，其中误报率与频谱段的假占用标识相关联，确定作为噪声系数和多分辨率频谱感测特性（MRSS）的函数的本底噪声 ）窗口，并且至少部分地基于所述误报率和所述本底噪声来计算感测阈值。 系统和方法还可以包括至少部分地基于所计算的感测阈值来确定RF频谱的一部分是否被占用。

    ADAPTIVE COMBINER ERROR CALIBRATION ALGORITHMS IN ALL-DIGITAL OUTPHASING TRANSMITTER
    9.
    发明申请
    ADAPTIVE COMBINER ERROR CALIBRATION ALGORITHMS IN ALL-DIGITAL OUTPHASING TRANSMITTER 审中-公开
    全数字输出发生器中的自适应组合器错误校准算法

    公开(公告)号：US20100074367A1

    公开(公告)日：2010-03-25

    申请号：US12561890

    申请日：2009-09-17

    申请人： Kwan-Woo Kim ,  Kyutae Lim ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    发明人： Kwan-Woo Kim ,  Kyutae Lim ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    IPC分类号： H04L25/03 ,  H04L27/12

    CPC分类号： H04L27/361 ,  H03F1/0294 ,  H03F1/3247 ,  H03F3/24 ,  H03F2200/207 ,  H03F2200/336 ,  H03F2200/375 ,  H03F2201/3233

    摘要： Systems and methods may include a signal component separator that receives a non-constant envelope input signal and at least one phase offset value, and generates first digital phase data and second digital phase data; at least one digital phase modulator that receives the first phase data and the second phase data and operates with a frequency synthesizer to generate a first component signal having a first constant envelope and a second component signal having a second constant envelope; at least one power amplifier that amplifies the first component signal and the second component signal; a non-isolated power combiner that combines the first amplified component signal and the second amplified component signal to generate an output signal having a non-constant envelope; and a mismatch compensator that monitors the output signal to determine the at least one phase offset value, where the at least one phase offset value is utilized by the signal component separator for phase adjustment.

    摘要翻译： 系统和方法可以包括接收非恒定包络输入信号和至少一个相位偏移值的信号分量分离器，并且产生第一数字相位数据和第二数字相位数据; 至少一个数字相位调制器，其接收第一相位数据和第二相位数据，并与频率合成器一起工作，以产生具有第一恒定包络线的第一分量信号和具有第二恒定包络线的第二分量信号; 至少一个放大第一分量信号和第二分量信号的功率放大器; 非隔离功率组合器，其组合所述第一放大分量信号和所述第二放大分量信号以产生具有非常数包络线的输出信号; 以及不匹配补偿器，其监视所述输出信号以确定所述至少一个相位偏移值，其中所述至少一个相位偏移值由所述信号分量分离器用于相位调整。

    SYSTEMS AND METHODS FOR A LEVEL-SHIFTING HIGH-EFFICIENCY LINC AMPLIFIER USING DYNAMIC POWER SUPPLY
    10.
    发明申请
    SYSTEMS AND METHODS FOR A LEVEL-SHIFTING HIGH-EFFICIENCY LINC AMPLIFIER USING DYNAMIC POWER SUPPLY 审中-公开
    使用动态电源的高效率LINC放大器的系统和方法

    公开(公告)号：US20100073084A1

    公开(公告)日：2010-03-25

    申请号：US12563710

    申请日：2009-09-21

    申请人： Joonhoi Hur ,  Kwan-Woo Kim ,  Kyutae Lim ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    发明人： Joonhoi Hur ,  Kwan-Woo Kim ,  Kyutae Lim ,  Chang-Ho Lee ,  Haksun Kim ,  Joy Laskar

    IPC分类号： H03F3/68

    CPC分类号： H03F1/0294 ,  H03F1/025 ,  H03F1/3241 ,  H03F3/191 ,  H03F3/24

    摘要： Systems and methods may be provided for a LINC system having a level-shifting LINC amplifier. The systems and methods may include a dynamic power supply that is adjustable to provide at least a first voltage supply level and a second voltage supply level higher than the first voltage supply level; a first power amplifier that amplifies a first component signal to generate a first amplified signal; a second power amplifier that amplifiers a second component signal to generate a second amplified signal, where the first component signal and the second component signal are components of an original signal, where the first component signal and the second component signal each have a constant envelope, and where the original signal has a non-constant envelope, and where the first and second power amplifiers are biased at the first voltage supply level or the second voltage supply level based upon an analysis of an amplitude of the original signal.

    摘要翻译： 可以为具有电平移位LINC放大器的LINC系统提供系统和方法。 系统和方法可以包括动态电源，其可调节以提供高于第一电压供应电平的至少第一电压供应电平和第二电压供应电平; 第一功率放大器，其放大第一分量信号以产生第一放大信号; 第二功率放大器，放大第二分量信号以产生第二放大信号，其中第一分量信号和第二分量信号是原始信号的分量，其中第一分量信号和第二分量信号各自具有恒定的包络线， 并且其中原始信号具有非恒定包络，并且其中基于原始信号的幅度的分析，第一和第二功率放大器被偏置在第一电压供应电平或第二电压供应电平。