公开(公告)号：US09537543B2

公开(公告)日：2017-01-03

申请号：US13976423

申请日：2011-12-20

申请人： Yang-Seok Choi

发明人： Yang-Seok Choi

IPC分类号： H04B7/015 ,  H04B3/23 ,  H04L5/14 ,  H04B1/525

CPC分类号： H04B7/015 ,  H04B1/525 ,  H04B3/23 ,  H04L5/14

摘要： An apparatus may include an antenna and a transceiver coupled to the antenna, the transceiver including a receiver operative to receive a radio-frequency (RF) signal and a transmitter operative to transmit a RF signal. The apparatus may also include an RF echo cancellation module coupled to the receiver and the transmitter, the RF echo cancellation module operative to generate an analog echo cancellation signal for the received RF signal based on a delayed version of the transmit RF signal. Other embodiments are disclosed and claimed.

摘要翻译： 一种装置可以包括耦合到天线的天线和收发器，所述收发器包括可接收射频（RF）信号的接收器和用于发射RF信号的发射器。 该装置还可以包括耦合到接收器和发射器的RF回波消除模块，RF回波消除模块可用于基于发射RF信号的延迟版本为所接收的RF信号生成模拟回波消除信号。 公开和要求保护其他实施例。

公开(公告)号：US08725102B2

公开(公告)日：2014-05-13

申请号：US12912399

申请日：2010-10-26

申请人： Jack Harriman Winters ,  Yang-Seok Choi ,  Byoung-Jo J. Kim ,  Andreas Molisch ,  Moe Z. Win ,  Hui Lo

发明人： Jack Harriman Winters ,  Yang-Seok Choi ,  Byoung-Jo J. Kim ,  Andreas Molisch ,  Moe Z. Win ,  Hui Lo

IPC分类号： H04B1/06 ,  H04B7/00

CPC分类号： H04B7/0822 ,  H04B1/1027 ,  H04B7/0413 ,  H04B7/046 ,  H04B7/0814 ,  H04B7/0854 ,  H04B7/0874 ,  H04J11/0063 ,  H04L5/0023

摘要： A method of performing receive antenna selection is presented. The method executes a determination operation for a set of receive antennas, determines a maximum result of the determination operation for two of the antennas, eliminates one of the two antennas from the set of antennas, and repeats the determination and elimination process until only a predetermined number of antennas remain in the set. The signals from these remaining antennas are then processed. The present invention reduces receiver complexity and cost.

摘要翻译： 提出了一种执行接收天线选择的方法。 该方法执行一组接收天线的确定操作，确定两个天线的确定操作的最大结果，从该组天线中消除两个天线中的一个天线，并重复确定和消除处理，直到只有预定的 天线数保留在该组中。 然后处理来自这些剩余天线的信号。 本发明降低了接收机的复杂性和成本。

公开(公告)号：US08477690B2

公开(公告)日：2013-07-02

申请号：US12844435

申请日：2010-07-27

申请人： Alexey Khoryaev ,  Alexander Maltsev ,  Kamran Etemad ,  Roman O. Maslennikov ,  Mikhail A. Shilov ,  Yang-Seok Choi ,  Andrey Chervyakov

发明人： Alexey Khoryaev ,  Alexander Maltsev ,  Kamran Etemad ,  Roman O. Maslennikov ,  Mikhail A. Shilov ,  Yang-Seok Choi ,  Andrey Chervyakov

IPC分类号： H04W4/00 ,  H04W24/00

CPC分类号： G01S5/10 ,  G01S5/0215 ,  G01S5/14 ,  H04W64/00

摘要： Briefly, in accordance with one or more embodiments, a mobile station receives a location beacon transmitted from multiple base stations based on a transmission plan for a predefined downlink location based services zone in the superframes of a signal frame structure. The transmission plan includes spreading transmissions of the location beacon that are unique to respective base stations. The mobile station identifies the base stations based on the respective location beacons and the transmission plan. The mobile station identifies a present location based on the location beacons and the identities of the base stations that from which the location beacons were received.

摘要翻译： 简而言之，根据一个或多个实施例，移动站基于在信号帧结构的超帧中基于预定义的基于下行链路位置的服务区域的传输规划，接收从多个基站发送的位置信标。 传输方案包括对各个基站唯一的扩展位置信标的传输。 移动台基于相应的位置信标和传输计划来识别基站。 移动台基于位置信标和从其接收到位置信标的基站的身份来识别当前位置。

公开(公告)号：US08195242B2

公开(公告)日：2012-06-05

申请号：US13085335

申请日：2011-04-12

申请人： Vahid Tarokh ,  Yang-Seok Choi ,  Siavash Alamouti

发明人： Vahid Tarokh ,  Yang-Seok Choi ,  Siavash Alamouti

IPC分类号： H04B1/00

CPC分类号： H01Q3/26 ,  H01Q1/246 ,  H04B7/0617 ,  H04W52/42

摘要： Improved methods and apparatuses are provided to address a potential “hidden beam problem” in wireless communication systems employing smart antennas. The improved methods and apparatuses utilize complementary beamforming (CBF) techniques, such as, for example, Subspace Complementary Beamforming (SCBF), Complementary Superposition Beamforming (CSBF) and/or Single Beam Complementary Beamforming (SBCBF) techniques.

摘要翻译： 提供了改进的方法和装置来解决使用智能天线的无线通信系统中的潜在的“隐患问题”。 改进的方法和装置利用互补波束成形（CBF）技术，例如子空间互补波束成形（SCBF），互补叠加波束成形（CSBF）和/或单波束互补波束成形（SBCBF）技术。

公开(公告)号：US20100157906A1

公开(公告)日：2010-06-24

申请号：US12653816

申请日：2009-12-21

申请人： Xiangying Yang ,  Muthaiah Muthu Venkatachalam ,  Yang-Seok Choi

发明人： Xiangying Yang ,  Muthaiah Muthu Venkatachalam ,  Yang-Seok Choi

IPC分类号： H04W40/00 ,  H04J3/06 ,  H04J1/00

CPC分类号： H04W56/001 ,  H04W76/38 ,  H04W84/045

摘要： Techniques are disclosed that provide for femto base stations to become synchronized with other base stations in a wireless network. For instance, a macro base station may instruct a mobile station to engage in a synchronization operation that synchronizes one or more timings (e.g., OFDM timings) of a femto base station with one or more corresponding timings of the macro base station. This may involve the mobile station having timing references of the macro base station. Further, this may involve the mobile station performing scanning operations and/or handover ranging operations with the femto base station. The mobile device may determine timing offsets between the femto BS and the macro BS. These offsets may be sent to the macro base station or to the femto base station. Also, the femto base station may adopt timings employed by the mobile station. The macro base station or a femto base station may direct a femto base station to achieve synchronization either directly with timing adjustment offset, or with a list of already synchronized femto base station as synchronization reference.

摘要翻译： 公开了提供毫微微基站与无线网络中的其他基站同步的技术。 例如，宏基站可以指示移动台进行将毫微微基站的一个或多个定时（例如，OFDM定时）与宏基站的一个或多个对应定时同步的同步操作。 这可能涉及具有宏基站的定时参考的移动站。 此外，这可能涉及移动台与毫微微基站执行扫描操作和/或切换测距操作。 移动设备可以确定毫微微BS与宏BS之间的定时偏移。 这些偏移可以被发送到宏基站或毫微微基站。 此外，毫微微基站可以采用移动台采用的定时。 宏基站或毫微微基站可以指示毫微微基站直接与定时调整偏移或者与作为同步参考的已经同步的毫微微基站的列表实现同步。

公开(公告)号：US07720166B2

公开(公告)日：2010-05-18

申请号：US11392931

申请日：2006-03-30

申请人： Yuval Lomnitz ,  Yang-Seok Choi

发明人： Yuval Lomnitz ,  Yang-Seok Choi

IPC分类号： H04L23/02 ,  H04L5/12

CPC分类号： H04L25/03229 ,  H04L25/03318 ,  H04L25/03968

摘要： Embodiments of the present invention provide a method, apparatus and system of decoding spatially multiplexed signals. In some demonstrative embodiments the method may include, for example, determining one or more hypothetical values of a transmitted signal of a set of transmitted signals based on one or more respective sets of hypothetical values assigned to a subset of the set of transmitted signals. Other embodiments are described and claimed.

摘要翻译： 本发明的实施例提供对空间复用信号进行解码的方法，装置和系统。 在一些演示实施例中，该方法可以包括例如基于分配给该组发送信号的子集的一个或多个相应的假设值组来确定一组发送信号的发送信号的一个或多个假设值。 描述和要求保护其他实施例。

公开(公告)号：US5872818A

公开(公告)日：1999-02-16

申请号：US800129

申请日：1997-02-13

申请人： Yang-Seok Choi

发明人： Yang-Seok Choi

IPC分类号： H04L7/02 ,  H04L7/00

CPC分类号： H04L7/0029

摘要： A full digital symbol timing recovery apparatus which can recover a symbol timing from a received signal. In the apparatus, a fixed oscillator generates a frequency signal having a constant frequency. An analog-to-digital converter samples the received signal at the constant frequency supplied from the fixed oscillator and converts the analog signal into a digital signal. A matching matches and filters the digitized signal according to a load filter coefficient and adjusts a timing phase. A timing error detector detects a symbol timing error from the output of the matching filter. A subtracter subtracts a predetermined value from the output of the timing error detector and outputs the subtracted result. A numerically controlled oscillator generates a frequency signal which varies periodically according to the output of the subtracter. A read-only-memory in which a plurality of sets of the filter coefficients are prestored receives the output of the numerically controlled oscillator as an address value and loads a set of the filter coefficients corresponding to the address value into the matching filter. A controller generates a symbol clock using a sampling clock of the constant frequency output from the fixed oscillator and delays the symbol clock corresponding to the positions at which repeated data is generated according to the output of the numerically controlled oscillator and outputs the delayed result.

摘要翻译： 一种全数字符号定时恢复装置，其可以从接收到的信号中恢复符号定时。 在该装置中，固定振荡器产生具有恒定频率的频率信号。 模数转换器以固定振荡器提供的恒定频率对接收到的信号进行采样，并将模拟信号转换为数字信号。 匹配匹配并根据负载滤波器系数对数字化信号进行滤波，并调整定时相位。 定时误差检测器从匹配滤波器的输出检测符号定时误差。 减法器从定时误差检测器的输出中减去预定值并输出相减结果。 数控振荡器产生根据减法器的输出周期性变化的频率信号。 预先存储多组滤波器系数的只读存储器接收数字振荡器的输出作为地址值，并将与地址值对应的一组滤波器系数加载到匹配滤波器中。 控制器使用从固定振荡器输出的恒定频率的采样时钟产生符号时钟，并根据数控振荡器的输出延迟对应于产生重复数据的位置的符号时钟，并输出延迟结果。