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    • 3. 发明申请
    • Configurable Multi-Format Transceiver System
    • 可配置的多格式收发器系统
    • US20130028600A1
    • 2013-01-31
    • US13560400
    • 2012-07-27
    • Jae Joon ChangYoungsik Hur
    • Jae Joon ChangYoungsik Hur
    • H04B1/44H04B10/24
    • H04B1/0064H04B1/006
    • A communication system includes a configurable transceiver that accommodates multi-band, multi-format signals by incorporating a duplex transceiver circuit, a simplex transceiver circuit and at least two switches. A first switch may be operated so as to configure the configurable transceiver to propagate duplex signals, such as for example, frequency division multiplexed (FDD) signals. The second switch may be operated so as to configure the simplex transceiver circuit to provide signal propagation of various types of signals in either a receive direction or a transmit direction. The various types of signals include time division multiplexed (TDD) signals.
    • 通信系统包括可配置收发器,其通过并入双工收发器电路,单工收发器电路和至少两个开关来适应多频带多格式信号。 可以操作第一开关以配置可配置收发器来传播双工信号,例如频分复用(FDD)信号。 第二开关可以被操作以便配置单工收发器电路以在接收方向或发送方向上提供各种类型的信号的信号传播。 各种类型的信号包括时分复用(TDD)信号。
    • 4. 发明申请
    • Hybrid Multi-Band Communication System
    • 混合多频带通信系统
    • US20130170840A1
    • 2013-07-04
    • US13560324
    • 2012-07-27
    • Jae Joon ChangYoungsik Hur
    • Jae Joon ChangYoungsik Hur
    • H04B10/2575
    • H04B10/2575H04B10/25754
    • A communication system includes a hybrid signal transmitter incorporating a signal routing circuit and a driver circuit. The signal routing circuit is configured to receive a first input signal and route the first input signal through a first signal path when the frequency bandwidth of the input signal is lower than a threshold frequency and through a second signal path when the frequency bandwidth exceeds the threshold frequency. The second signal path includes a frequency down-converter circuit. The driver circuit is configured to receive the routed input signal via the first signal path or the second signal path, and convert the routed input signal into an optical signal for coupling into an optical fiber.
    • 通信系统包括并入信号路由电路和驱动电路的混合信号发射机。 所述信号路由电路经配置以在所述输入信号的频率带宽低于阈值频率时通过第一信号路径接收所述第一输入信号,并且当频带宽度超过阈值时通过第二信号路径 频率。 第二信号路径包括降频转换器电路。 驱动器电路被配置为经由第一信号路径或第二信号路径接收路由的输入信号,并将路由的输入信号转换成用于耦合到光纤中的光信号。
    • 5. 发明授权
    • Systems, methods, and apparatuses for detecting digital television (DTV) communications signals
    • 用于检测数字电视(DTV)通信信号的系统,方法和装置
    • US08599970B2
    • 2013-12-03
    • US12945196
    • 2010-11-12
    • Andrew Joo KimSeungmok OhMatthew KuhnBob NayarYoungsik Hur
    • Andrew Joo KimSeungmok OhMatthew KuhnBob NayarYoungsik Hur
    • H04L27/06H04N5/44
    • H04N17/004
    • A received RF signal is down-converted to a baseband or low-IF digitized signal in order to search for a pilot signal that indicates a presence of a DTV signal such as an ATSC DTV signal. The pilot signal characteristically resides in a fixed frequency range for all valid DTV signals and is extracted by processing the baseband or low-IF signal in multiple stages. The first stage reduces signal information to that pertaining to the frequency band covering all valid pilot frequencies, thereby reducing the sampling rate and computational complexity of subsequent operations. A second stage operates on this reduced rate signal to focus on a series of particular pilot frequencies for interrogation. For each such candidate frequency, the cyclostationarity of the signal is measured and tested for statistical significance relative to the background energy to yield an effective test that is invariant with respect to background noise level.
    • 接收的RF信号被下变频为基带或低IF数字信号,以便搜索指示诸如ATSC DTV信号的DTV信号的存在的导频信号。 导频信号特征性地驻留在所有有效DTV信号的固定频率范围内,并且通过多级处理基带或低IF信号来提取。 第一级将信号信息减少到与覆盖所有有效导频的频带有关的信号,从而降低后续操作的采样率和计算复杂度。 第二阶段对该降低的速率信号进行操作,以集中于一系列特定的用于询问的导频。 对于每个这样的候选频率,测量和测试信号的相对于背景能量的统计学显着性的信号的周期平稳度,以产生相对于背景噪声水平不变的有效测试。
    • 6. 发明申请
    • SYSTEMS, METHODS, AND APPARATUSES FOR DETECTING DIGITAL TELEVISION (DTV) COMMUNICATIONS SIGNALS
    • 用于检测数字电视(DTV)通信信号的系统,方法和装置
    • US20110169965A1
    • 2011-07-14
    • US12945196
    • 2010-11-12
    • Andrew Joo KimSeungmok OhMatthew KuhnBob NayarYoungsik Hur
    • Andrew Joo KimSeungmok OhMatthew KuhnBob NayarYoungsik Hur
    • H04N17/00
    • H04N17/004
    • Embodiments of the invention may provide systems and methods for detecting the presence a DTV signal such as an ATSC DTV signal. The system and methods may be applied to a received RF signal that has been down-converted to a baseband or low-IF digitized signal. The systems and methods may detect a presence of a DTV signal by searching for its characteristic pilot signal, known to reside in a fixed frequency range for all valid DTV signals. This pilot signal may be extracted by processing the baseband or low-IF signal in multiple stages. The first stage may reduce the signal information to that pertaining to the frequency band covering all valid pilot frequencies and commensurately reduces the sampling rate, and hence computational complexity of subsequent operations. A second stage may then efficiently operate on this reduced rate signal to focus on a series of particular pilot frequencies for interrogation. For each such candidate frequency, the cyclostationarity of the signal may be measured and tested for statistical significance relative to the background energy to yield an effective test that is invariant with respect to the background noise level. In a simplified case, this can correspond to measuring the energy in a very tight candidate subband normalized against the energy from a larger subband. Furthermore, the energy in the candidate subband can be taken as the energy in a Fourier series coefficient.
    • 本发明的实施例可以提供用于检测诸如ATSC DTV信号之类的DTV信号的存在的系统和方法。 系统和方法可以应用于已经被下变频到基带或低IF数字化信号的接收的RF信号。 系统和方法可以通过搜索其特征导频信号来检测DTV信号的存在,已知其驻留在所有有效DTV信号的固定频率范围内。 可以通过多级处理基带或低IF信号来提取该导频信号。 第一级可以将信号信息减少到覆盖所有有效导频的频带,并相应地降低采样速率,从而降低后续操作的计算复杂度。 然后,第二级可以有效地对该降低的速率信号进行操作,以集中在一系列特定的导频上进行询问。 对于每个这样的候选频率,信号的周期平稳性可以相对于背景能量被测量和测试统计学显着性,以产生相对于背景噪声电平不变的有效测试。 在简化的情况下,这可以对应于在相对于较大子带的能量标准化的非常紧密的候选子带中测量能量。 此外,可以将候选子带中的能量作为傅里叶级数系数​​的能量。
    • 9. 发明授权
    • Systems, methods, and apparatuses for reducing interference at the front-end of a communications receiving device
    • 用于减少通信接收设备前端干扰的系统,方法和设备
    • US08565681B2
    • 2013-10-22
    • US12731859
    • 2010-03-25
    • Andrew Joo KimYunseo ParkSeongmo YimYoungsik Hur
    • Andrew Joo KimYunseo ParkSeongmo YimYoungsik Hur
    • H04B1/00H04B1/44
    • H04B1/525
    • Embodiments of the invention may provide for reducing interference in the front-end of a communications receiver. The cancellation circuitry may be utilized in conjunction with a preliminary rejection filter for improved rejection of out-of-band interference from other radio services or circuitry. The cancellation circuit may be placed in parallel with the preliminary rejection filter and may enhance suppression at the interference frequency by matching the gain and phase of the preliminary rejection filter prior to subtracting the matched signal from the preliminary rejection filter output. The cancellation circuit need not necessary know beforehand the characteristics of the preliminary rejection filter, the interference source, or the coupling mechanism, as it may adapt to unknown or varying interferers by adapting the matching gain and phase values based on the output of the preliminary rejection filter at tap points occurring both before and after application of the cancellation signal.
    • 本发明的实施例可以提供减少通信接收机前端的干扰。 消除电路可以与预备拒绝滤波器一起使用,以改善对来自其他无线电业务或电路的带外干扰的抑制。 取消电路可以与预排斥滤波器并联放置,并且可以在从预备阻滤波器输出中减去匹配信号之前匹配预滤波滤波器的增益和相位来增强干扰频率下的抑制。 消除电路不需要事先知道预备扼流滤波器,干扰源或耦合机构的特性,因为它可以通过基于初步抑制的输出来适配匹配增益和相位值来适应未知或变化的干扰源 在应用消除信号之前和之后发生的抽头点处的滤波器。
    • 10. 发明申请
    • Wireless Power Transfer System and Methods
    • 无线电力传输系统与方法
    • US20120280650A1
    • 2012-11-08
    • US13357879
    • 2012-01-25
    • Dukhyun KimYun Ho LeeYoungsik Hur
    • Dukhyun KimYun Ho LeeYoungsik Hur
    • H02J7/00
    • H02J7/025H02J17/00H02J50/05H02J50/10H02J50/40H02J50/80
    • Systems and methods pertaining to wireless power transfer are disclosed. In one implementation, a system includes a wireless charger that is used to charge at least one wirelessly chargeable device. The wireless charger includes a master communication system and at least one wireless power charge transmitter, while the wirelessly chargeable device includes a slave wireless communication system configured at least in part, for communicating with the master wireless communication system in order to execute a wireless power charging operation. The wirelessly chargeable device further includes a wireless power charge receiver configured to receive a wireless power charge from the wireless power charge transmitter contained in the wireless charger.
    • 公开了与无线功率传输相关的系统和方法。 在一个实施方式中,系统包括用于对至少一个无线充电装置充电的无线充电器。 无线充电器包括主通信系统和至少一个无线电力充电发射机,而无线充电装置包括至少部分配置的从无线通信系统,用于与主无线通信系统进行通信,以执行无线充电 操作。 无线充电装置还包括被配置为从无线充电器中包含的无线电力充电发射器接收无线电力电荷的无线电力充电接收器。