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    Apparatus and method for measuring received signal strength indicator, and recording medium storing program embodying the same method
    1.
    发明授权
    Apparatus and method for measuring received signal strength indicator, and recording medium storing program embodying the same method 失效
    用于测量接收信号强度指示器的装置和方法，以及体现相同方法的记录介质存储程序

    公开(公告)号：US07738544B2

    公开(公告)日：2010-06-15

    申请号：US10588101

    申请日：2004-06-23

    申请人： Choong-Il Yeh ,  Hyoung-Soo Lim ,  Dong-Sung Kwon

    发明人： Choong-Il Yeh ,  Hyoung-Soo Lim ,  Dong-Sung Kwon

    IPC分类号： H04B3/46

    CPC分类号： H04B17/318 ,  H04B17/26

    摘要： An apparatus for estimating a RSSI of a signal transmitted/received in a wireless network, the apparatus including an ADC quantizing one of I-branch and Q-branch signals, extracted from the signal, into a digital signal; an absolute value calculating unit calculating an absolute value of the digital signal quantized by the ADC and outputting a result; an accumulate unit accumulating an output of the absolute calculating unit for a given time period and outputting a result; a square unit squaring an output of the accumulate unit and outputting a result; and a multiply unit multiplying an output of the square unit by a given value and outputting a result, the given value being determined based on the number of input bits, an input clip level, and input resistance of the ADC when the probability density functions at input and output signals of the ADC are approximately Gaussian with zero mean.

    摘要翻译： 一种用于估计在无线网络中发送/接收的信号的RSSI的装置，所述装置包括将从所述信号提取的I分支和Q分支信号中的一者量化为数字信号的ADC; 绝对值计算单元，计算由ADC量化的数字信号的绝对值并输出结果; 累积单元，累积绝对计算单元的输出给定时间并输出结果; 平方单元对累加单元的输出进行平方并输出结果; 以及乘法单元将平方单元的输出乘以给定值并输出结果，当概率密度作用在ADC上时，给定值基于输入比特数，输入剪辑电平和ADC的输入电阻来确定 ADC的输入和输出信号近似为高斯，零均值。

    Apparatus and Method for Measuring Received Signal Strength Indicator, and Recording Medium Storing Program Embodying the Same Method
    2.
    发明申请
    Apparatus and Method for Measuring Received Signal Strength Indicator, and Recording Medium Storing Program Embodying the Same Method 失效
    用于测量接收信号强度指示器的装置和方法以及实现相同方法的记录介质存储程序

    公开(公告)号：US20070274377A1

    公开(公告)日：2007-11-29

    申请号：US10588101

    申请日：2004-06-23

    申请人： Choong-Il Yeh ,  Hyoung-Soo Lim ,  Dong-Sung Kwon

    发明人： Choong-Il Yeh ,  Hyoung-Soo Lim ,  Dong-Sung Kwon

    IPC分类号： H04B17/00

    CPC分类号： H04B17/318 ,  H04B17/26

    摘要： An apparatus for estimating a RSSI of a signal transmitted/received in a wireless network, the apparatus including an ADC quantizing one of I-branch and Q-branch signals, extracted from the signal, into a digital signal; an absolute value calculating unit calculating an absolute value of the digital signal quantized by the ADC and outputting a result; an accumulate unit accumulating an output of the absolute calculating unit for a given time period and outputting a result; a square unit squaring an output of the accumulate unit and outputting a result; and a multiply unit multiplying an output of the square unit by a given value and outputting a result, the given value being determined based on the number of input bits, an input clip level, and input resistance of the ADC when the probability density functions at input and output signals of the ADC are approximately Gaussian with zero mean.

    摘要翻译： 一种用于估计在无线网络中发送/接收的信号的RSSI的装置，所述装置包括将从所述信号提取的I分支和Q分支信号中的一者量化为数字信号的ADC; 绝对值计算单元，计算由ADC量化的数字信号的绝对值并输出结果; 累积单元，累积绝对计算单元的输出给定时间并输出结果; 平方单元对积累单元的输出进行平方并输出结果; 以及乘法单元将平方单元的输出乘以给定值并输出结果，当概率密度作用在ADC上时，给定值基于输入比特数，输入剪辑电平和ADC的输入电阻来确定 ADC的输入和输出信号近似为高斯，零均值。

    Method for Allocating Data and Pilots, and Transmitting Method and Device and Receiving Method and Device Using the Same in Orthogonal Frequency Division Multiple Access System
    4.
    发明申请
    Method for Allocating Data and Pilots, and Transmitting Method and Device and Receiving Method and Device Using the Same in Orthogonal Frequency Division Multiple Access System 有权
    分配数据和导频的方法，以及正交频分多址系统的发送方法及装置及其接收方法及装置

    公开(公告)号：US20070263743A1

    公开(公告)日：2007-11-15

    申请号：US10583593

    申请日：2004-07-22

    申请人： Yu-Ro Lee ,  Jonge-Ee Oh ,  Choong-Il Yeh ,  Hyoung-Soo Lim ,  Dong-Seung Kwon

    发明人： Yu-Ro Lee ,  Jonge-Ee Oh ,  Choong-Il Yeh ,  Hyoung-Soo Lim ,  Dong-Seung Kwon

    IPC分类号： H04B7/02

    CPC分类号： H04B7/12 ,  H04L5/0044 ,  H04L5/0048 ,  H04W72/00

    摘要： Disclosed is a method for allocating data and pilots, a transmitting method and device, a receiving method and device in an OFDMA system. A terminal partitions subcarrier groups and symbols from an uplink channel based on a basic pilot pattern generated by a specific reference, receives at least one subchannel based on the partitioned subcarrier groups and symbols, hops the subcarrier groups caused by the subchannel according to hopping patterns, allocates data, and differently positions the pilots per subcarrier group based on the basic pilot pattern. Accordingly, the probability of pilot collision between adjacent cells is reduced, and accuracy of channel estimation is increased through boosting the pilot subcarrier power.

    摘要翻译： 公开了一种在OFDMA系统中分配数据和导频的方法，发送方法和设备，接收方法和设备。 终端基于由特定基准产生的基本导频模式，从上行链路信道分割子载波组和符号，根据划分的子载波组和符号接收至少一个子信道，根据跳频图案跳过由子信道引起的子载波组， 分配数据，并且基于基本导频模式不同地定位每个子载波组的导频。 因此，相邻小区之间的导频冲突的概率降低，并且通过提升导频副载波功率来增加信道估计的精度。

    Method for Constructing Frame Preamble in Ofdm Wireless Communication System, and Method for Acquiring Frame Synchronization and Searching Cells Using Preamble
    7.
    发明申请
    Method for Constructing Frame Preamble in Ofdm Wireless Communication System, and Method for Acquiring Frame Synchronization and Searching Cells Using Preamble 审中-公开
    在OFDM无线通信系统中构造帧前缀的方法及使用前导码获取帧同步和搜索单元的方法

    公开(公告)号：US20080043858A1

    公开(公告)日：2008-02-21

    申请号：US10584716

    申请日：2004-10-27

    申请人： Hyoung-Soo Lim ,  Choong-Il Yeh ,  Yu-Ro Lee ,  Dong-Seung Kwon ,  Seung-Ku Hwang

    发明人： Hyoung-Soo Lim ,  Choong-Il Yeh ,  Yu-Ro Lee ,  Dong-Seung Kwon ,  Seung-Ku Hwang

    IPC分类号： H04K1/10

    CPC分类号： H04J11/00 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2675

    摘要： Disclosed are a method for constructing a frame preamble in an OFDM wireless communication system, and a method for acquiring frame synchronization and searching cells using the preamble. The preamble is arranged at the beginning of a frame and constructed of a pattern repeated an integer number of times, and a CP. The pattern has a length shorter than a single OFDM symbol interval. The length of the repetitive pattern is not limited to an integer number of times a single OFDM symbol interval. Frame synchronization can be acquired by observing cross-correlation of a received signal and reference patterns and detecting the moment when the absolute value of the cross-correlation exceeds a predetermined threshold. Otherwise, frame synchronization can be acquired by observing auto-correlation of the received signal using repeated patterns included in the received signal and detecting the moment when the absolute value of the auto-correlation becomes the maximum value.

    摘要翻译： 公开了一种在OFDM无线通信系统中构造帧前同步码的方法，以及用于使用前置码获取帧同步和搜索小区的方法。 前导码被布置在帧的开始处，并且由重复整数次的模式和CP构成。 该模式的长度短于单个OFDM符号间隔。 重复模式的长度不限于单个OFDM符号间隔的整数倍。 可以通过观察接收信号和参考模式的互相关，并且检测互相关绝对值超过预定阈值的时刻来获取帧同步。 否则，通过使用包含在接收信号中的重复模式来观察接收信号的自相关，并且检测自相关的绝对值成为最大值的时刻，可以获取帧同步。

    BEAMFORMING METHOD AND DEVICE
    8.
    发明申请
    BEAMFORMING METHOD AND DEVICE 审中-公开
    波纹形成方法和装置

    公开(公告)号：US20100103900A1

    公开(公告)日：2010-04-29

    申请号：US12518233

    申请日：2007-09-19

    申请人： Choong-Il Yeh ,  Dong-Seung Kwon ,  Jee-Hwan Ahn

    发明人： Choong-Il Yeh ,  Dong-Seung Kwon ,  Jee-Hwan Ahn

    IPC分类号： H04W4/00

    CPC分类号： H04B7/086 ,  H04B7/0695 ,  H04W74/00 ,  H04W88/08

    摘要： The present invention relates to a beamforming device in an orthogonal frequency division multiplexing access system, and a method thereof. In the method, a switched beamforming algorithm is applied to perform downlink beamforming, and an adaptive beamforming algorithm is applied to perform uplink receiving beamforming. In addition, a half wavelength array antenna is used to simultaneously allocate the same resource to two terminals separately positioned in two different spaces, so as to support spatial division multiple access (SDMA). In this case, since a base station uses channel status information at transmitter (CSIT) for transmitting beamforming and receiving beamforming, the SDMA may be supported without obtaining additional channel status information at receiver (CSIR) when realizing the uplink receiving beamforming.

    摘要翻译： 本发明涉及正交频分复用接入系统中的波束成形装置及其方法。 在该方法中，应用交换波束成形算法来执行下行波束成形，并且应用自适应波束成形算法来执行上行链路接收波束形成。 另外，使用半波长阵列天线来将相同的资源同时分配给分开定位在两个不同空间中的两个终端，以支持空分多址（SDMA）。 在这种情况下，由于基站在发射机（CSIT）处使用信道状态信息来发送波束成形和接收波束形成，所以在实现上行链路接收波束形成时，可以不在接收机（CSIR）下获得附加信道状态信息的情况下支持SDMA。

    Method for Maximal Ratio Combining of Spatially Filtered Signals and Apparatus Therefor
    9.
    发明申请
    Method for Maximal Ratio Combining of Spatially Filtered Signals and Apparatus Therefor 有权
    空间滤波信号最大比组合方法及其设备

    公开(公告)号：US20080214218A1

    公开(公告)日：2008-09-04

    申请号：US12088109

    申请日：2006-09-28

    申请人： Choong-Il Yeh ,  Jae-Joon Park ,  Chul-Sik Yoon

    发明人： Choong-Il Yeh ,  Jae-Joon Park ,  Chul-Sik Yoon

    IPC分类号： H04B7/00

    CPC分类号： H04B7/0857

    摘要： The present invention relates to a maximum ratio combining method of spatial-filtered received signals and an apparatus using the same. For this purpose the present invention provides a method for receiving signals by using a plurality of antennas that form a linear array antenna, multiplying a plurality of weight vectors by the received signals, summing the multiplication results for each weight vector, and combining the summing results by using maximum ratio combining. According to the present invention, signals are dividedly received by applying spatial filtering for a receiving direction of each signal and performance can be improved by combining the received signals by using maximum ratio combining. In addition, performance of an MRC-rake and a beam forming gain can be simultaneously acquired according to the present invention.

    摘要翻译： 本发明涉及空间滤波接收信号的最大比组合方法和使用其的装置。 为此，本发明提供一种通过使用形成线性阵列天线的多个天线来接收信号的方法，将多个加权矢量乘以接收信号，对每个加权矢量乘以相乘结果，并将求和结果 通过使用最大比率组合。 根据本发明，通过对每个信号的接收方向应用空间滤波来分割接收信号，并且可以通过使用最大比合并来组合接收信号来提高性能。 此外，根据本发明，可以同时获取MRC耙式和波束形成增益的性能。

    Method for Selecting Switched Beam Using Pilot Signal and System Thereof
    10.
    发明申请
    Method for Selecting Switched Beam Using Pilot Signal and System Thereof 有权
    使用导频信号及其系统选择开关波束的方法

    公开(公告)号：US20080095251A1

    公开(公告)日：2008-04-24

    申请号：US11722049

    申请日：2005-12-21

    申请人： Choong-Il Yeh ,  Young-Seog Song ,  In-Kyeong Choi ,  Dong-Seung Kwon

    发明人： Choong-Il Yeh ,  Young-Seog Song ,  In-Kyeong Choi ,  Dong-Seung Kwon

    IPC分类号： H04L27/28

    CPC分类号： H04B7/0695 ,  H04B7/0634

    摘要： The present invention relates to a system for selecting a switched beam for supplying a maximum received power to a subscriber station, and a method thereof. The number of switched beams used by a base station is limited, and a weight value vector for forming the switched beam is predefined. The subscriber station uses a pilot signal for discerning transmitting antennas to estimate channel values for the respective transmitting antennas, and uses the channel values and the predefined weight value vectors to determine a switched beam for supplying a maximum signal-to-noise ratio (SNR). The subscriber station notifies the base station of an identifier of a selected beam by using a feedback channel, and the base station uses the switched beam to transmit traffic data.

    摘要翻译： 本发明涉及一种用于选择向用户站提供最大接收功率的切换波束的系统及其方法。 基站使用的切换波束的数量是有限的，并且预定了用于形成切换波束的权重值向量。 用户站使用导频信号来识别发射天线以估计各个发射天线的信道值，并且使用信道值和预定权重值向量来确定用于提供最大信噪比（SNR）的切换波束， 。 用户台通过使用反馈信道向基站通知所选波束的标识符，并且基站使用切换波束来传输业务数据。