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1. 发明授权

US07940858B2 Apparatus and method for calibration in a communication system 有权
标题翻译：通信系统中的校准装置和方法
公开(公告)号：US07940858B2
公开(公告)日：2011-05-10
申请号：US11635475
申请日：2006-12-07
申请人： Yong-Su Lee , Youn-Ok Park , Young-Jo Bang , Kyung-Yeol Sohn , Jae-Gun Jung
发明人： Yong-Su Lee , Youn-Ok Park , Young-Jo Bang , Kyung-Yeol Sohn , Jae-Gun Jung
IPC分类号： H04L27/00 , H04B7/06
CPC分类号： H01Q1/246 , H01Q3/267 , H04B17/14 , H04L27/2626
摘要： In a calibration apparatus in a communication system, a modulation unit calculates a reference signal by modulating a downlink signal, and a digital Intermediate Frequency (IF) unit converts the reference signal to an intermediate frequency signal. An up-converter converts the intermediate frequency signal to a Radio Frequency (RF) signal, and a down-converter generates a received signal for each of the paths from the RF signal to be transmitted through each path. A calibrator calculates a correction value for each path and a delay value by using the reference signal and the received signal for each path.
摘要翻译：在通信系统中的校准装置中，调制单元通过调制下行链路信号来计算参考信号，并且数字中频（IF）单元将参考信号转换为中频信号。上变频器将中频信号转换成射频（RF）信号，下变频器从RF信号中产生每个路径的接收信号，以通过每个路径传输。校准器通过使用参考信号和每个路径的接收信号来计算每个路径的校正值和延迟值。

2. 发明授权

US07746966B2 Method for automatic gain control before initial synchronization in OFDM system and apparatus thereof 有权
标题翻译： OFDM系统中的初始同步之前的自动增益控制方法及其装置
公开(公告)号：US07746966B2
公开(公告)日：2010-06-29
申请号：US11791442
申请日：2005-06-24
申请人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Young-Jo Bang
发明人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Young-Jo Bang
IPC分类号： H04L27/08
CPC分类号： H03G3/3078 , H04L27/2647 , H04L27/2662
摘要： The present invention relates to a method for automatic gain control (AGC) before an initial synchronization of a mobile station modem in OFDM system, and an apparatus thereof. The AGC apparatus includes: an initial synchronization inspector that verifies whether an initial synchronization for an input block sample (k) signal has been performed; a frame divider that divides a frame into predetermined intervals B(k) for the input block sample(k) signal in the case that the initial synchronization has not been performed; a reference value inspector that compares a difference value Pref−Pcalc, between a predetermined reference value Pref and sample data average energy Pcalc, with a predetermined value; a count controller that increases or decreases the count when the difference value Pref−Pcalc compared by the reference value inspector is greater or less than the predetermined value; a count inspector that inspects whether the count is greater or less than 0 when the input block sample (k) reaches a maximum value MAX; and a gain controller which increases or decreases the gain, level by level, according to the count inspection result of the count inspector.
摘要翻译：本发明涉及OFDM系统中的移动台调制解调器的初始同步之前的自动增益控制（AGC）的方法及其装置。 AGC装置包括：初始同步检查器，其验证是否已经执行了输入块样本（k）信号的初始同步; 在没有执行初始同步的情况下，对于输入块样本（k）信号将帧划分成预定间隔B（k）的帧分割器; 参考值检查器，将预定参考值Pref和采样数据平均能量Pcalc之间的差值Pref-Pcalc与预定值进行比较; 当由参考值检查器比较的差值Pref-Pcalc大于或小于预定值时增加或减少计数的计数控制器; 当输入块样本（k）达到最大值MAX时，检查计数是否大于或小于0的计数检查器; 以及根据计数检查员的计数检查结果逐级增加或减少增益的增益控制器。

3. 发明申请

US20080310318A1 Apparatus and Method For Monitoring Base Station Signal in Communication System Having Multiple Antennas 有权
标题翻译：用于监测具有多个天线的通信系统中的基站信号的装置和方法
公开(公告)号：US20080310318A1
公开(公告)日：2008-12-18
申请号：US12094897
申请日：2006-12-08
申请人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
发明人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
IPC分类号： H04L12/26
CPC分类号： H04W24/00 , H04B17/12 , H04W24/08 , H04W88/08
摘要： In a signal monitoring apparatus of a base station of a communication system having multiple antennas, a transmitting/receiving unit transmits a plurality of transmit signals by using the multiple antennas or processes a plurality of receive signals received through the multiple antennas. A radio frequency calibration unit calibrates the transmit signals transmitted through the multiple antennas, and processes at least one target transmit signal among the plurality of transmit signals so as to monitor the at least one target transmit signal. A signal monitoring unit receives at least one first signal or at least one second signal, and transmits the at least one first signal or the at least one second signal to user equipment. The at least one first signal is a signal processed from at least one target receive signal among the plurality of receive signals, and the at least one second signal is a signal processed from the at least one target transmit signal by controlling the radio frequency calibration unit.
摘要翻译：在具有多个天线的通信系统的基站的信号监视装置中，发送/接收单元通过使用多个天线发送多个发送信号，或处理通过多个天线接收的多个接收信号。射频校准单元校准通过多个天线发射的发射信号，并处理多个发射信号中的至少一个目标发射信号，以便监测至少一个目标发射信号。信号监测单元接收至少一个第一信号或至少一个第二信号，并将所述至少一个第一信号或至少一个第二信号发送给用户设备。所述至少一个第一信号是从所述多个接收信号中的至少一个目标接收信号处理的信号，并且所述至少一个第二信号是通过控制所述射频校准单元从所述至少一个目标发射信号处理的信号。

4. 发明授权

US08184606B2 Apparatus and method for monitoring base station signal in communication system having multiple antennas 有权
标题翻译：用于监测具有多个天线的通信系统中的基站信号的装置和方法
公开(公告)号：US08184606B2
公开(公告)日：2012-05-22
申请号：US12094897
申请日：2006-12-08
申请人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
发明人： Young-Jo Bang , Youn-Ok Park , Yong-Su Lee
IPC分类号： H04H20/67
CPC分类号： H04W24/00 , H04B17/12 , H04W24/08 , H04W88/08
摘要： In a signal monitoring apparatus of a base station of a communication system having multiple antennas, a transmitting/receiving unit transmits a plurality of transmit signals by using the multiple antennas or processes a plurality of receive signals received through the multiple antennas. A radio frequency calibration unit calibrates the transmit signals transmitted through the multiple antennas, and processes at least one target transmit signal among the plurality of transmit signals so as to monitor the at least one target transmit signal. A signal monitoring unit receives at least one first signal or at least one second signal, and transmits the at least one first signal or the at least one second signal to user equipment. The at least one first signal is a signal processed from at least one target receive signal among the plurality of receive signals, and the at least one second signal is a signal processed from the at least one target transmit signal by controlling the radio frequency calibration unit.
摘要翻译：在具有多个天线的通信系统的基站的信号监视装置中，发送/接收单元通过使用多个天线发送多个发送信号，或处理通过多个天线接收的多个接收信号。射频校准单元校准通过多个天线发射的发射信号，并处理多个发射信号中的至少一个目标发射信号，以便监测至少一个目标发射信号。信号监测单元接收至少一个第一信号或至少一个第二信号，并将所述至少一个第一信号或至少一个第二信号发送给用户设备。所述至少一个第一信号是从所述多个接收信号中的至少一个目标接收信号处理的信号，并且所述至少一个第二信号是通过控制所述射频校准单元从所述至少一个目标发射信号处理的信号。

5. 发明申请

US20080056394A1 Method for Automatic Gain Control Before Initial Synchronization in Ofdm System and Apparatus Thereof 有权
标题翻译： Ofdm系统初始同步之前的自动增益控制方法及其设备
公开(公告)号：US20080056394A1
公开(公告)日：2008-03-06
申请号：US11791442
申请日：2005-06-24
申请人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Young-Jo Bang
发明人： Yong-Su Lee , Youn-Ok Park , Jun-Woo Kim , Young-Jo Bang
IPC分类号： H04L27/08 , H04L27/28
CPC分类号： H03G3/3078 , H04L27/2647 , H04L27/2662
摘要： The present invention relates to a method for automatic gain control (AGC) before an initial synchronization of a mobile station modem in OFDM system, and an apparatus thereof The AGC apparatus includes: an initial synchronization inspector that verifies whether an initial synchronization for an input block sample (k) signal has been performed; a frame divider that divides a frame into predetermined intervals B(k) for the input block sample(k) signal in the case that the initial synchronization has not been performed; a reference value inspector that compares a difference value Pref−Pcalc, between a predetermined reference value Pref and sample data average energy Pcalc, with a predetermined value; a count controller that increases or decreases the count when the difference value Pref−Pcalc compared by the reference value inspector is greater or less than the predetermined value; a count inspector that inspects whether the count is greater or less than 0 when the input block sample (k) reaches a maximum value MAX; and a gain controller which increases or decreases the gain, level by level, according to the count inspection result of the count inspector.
摘要翻译：本发明涉及OFDM系统中的移动台调制解调器的初始同步之前的自动增益控制（AGC）的方法及其装置。AGC装置包括：初始同步检查器，其验证输入块的初始同步样本（k）信号已被执行; 在没有执行初始同步的情况下，对于输入块样本（k）信号将帧划分成预定间隔B（k）的帧分割器; 参考值检查器，将预定参考值Pref和采样数据平均能量Pcalc之间的差值Pref-Pcalc与预定值进行比较; 当由参考值检查器比较的差值Pref-Pcalc大于或小于预定值时增加或减少计数的计数控制器; 当输入块样本（k）达到最大值MAX时，检查计数是否大于或小于0的计数检查器; 以及根据计数检查员的计数检查结果，逐级增加或减少增益的增益控制器。

6. 发明授权

US08040980B2 Log likelihood ratio calculation method, transmit signal detection method, and receiver 有权
标题翻译：对数似然比计算方法，发射信号检测方法和接收机
公开(公告)号：US08040980B2
公开(公告)日：2011-10-18
申请号：US12142600
申请日：2008-06-19
申请人： Seung Jae Bahng , Chang Wahn Yu , Young Jo Bang , Dae Ho Kim , Young Ha Lee , Youn-Ok Park
发明人： Seung Jae Bahng , Chang Wahn Yu , Young Jo Bang , Dae Ho Kim , Young Ha Lee , Youn-Ok Park
IPC分类号： H04L27/06 , H03K9/00 , H04L27/00
CPC分类号： H04L25/03318 , H04L25/0204 , H04L25/0246 , H04L25/067
摘要： The present invention relates to a log-likelihood ratio calculation method, a transmitting signal detection method, and a receiver. The present invention estimates a channel on the basis of the received signal and rearranges a plurality of layers. Further, at the time of rearrangement of the layers, a symbol of a layer having the lowest reliability is considered for every constellation dot, and the successive interference for the remaining layers is removed corresponding to the constellation dots of the layer having the lowest reliability to set the transmitting symbol candidate vector. Furthermore, a log-likelihood ratio for every bit of the plurality of layers is calculated using the transmitting symbol candidate vector to decode the channel.
摘要翻译：本发明涉及对数似然比计算方法，发送信号检测方法和接收机。本发明基于接收到的信号来估计信道并重排多个层。此外，在层的重排时，对于每个星座点考虑具有最低可靠性的层的符号，并且对应于具有最低可靠性的层的星座点去除对剩余层的连续干扰，设置发送符号候选向量。此外，使用发送符号候选向量计算多个层中的每一比特的对数似然比，以解码该信道。

7. 发明授权

US08098777B2 Signal detection method and receiving apparatus in MIMO system 有权
标题翻译： MIMO系统中的信号检测方法和接收装置
公开(公告)号：US08098777B2
公开(公告)日：2012-01-17
申请号：US11930047
申请日：2007-10-30
申请人： Seung-Jae Bahng , Young-Jo Bang , Youn-Ok Park
发明人： Seung-Jae Bahng , Young-Jo Bang , Youn-Ok Park
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
CPC分类号： H04B7/0413 , H04L1/0656 , H04L25/0204 , H04L25/0246
摘要： The present invention relates to a signal detection method and a receiving apparatus in a multiple input multiple output (MIMO) system. More particularly, the present invention relates to a signal detection device in a MIMO system using a spatial multiplexing (SM) method. In the signal detection method, a channel is estimated and layers are rearranged according to a predetermined layer arrangement rule. QR-decomposition is performed by using a rearranged system model, all constellation points in a symbol of a layer having the lowest reliability are considered, and symbols are detected by using a sequential interference elimination method.
摘要翻译：本发明涉及多输入多输出（MIMO）系统中的信号检测方法和接收装置。更具体地，本发明涉及使用空间复用（SM）方法的MIMO系统中的信号检测装置。在信号检测方法中，估计信道并根据预定层布置规则重新布置层。通过使用重排系统模型进行QR分解，考虑具有最低可靠性的层的符号中的所有星座点，并且通过使用顺序干扰消除方法来检测符号。

8. 发明授权

US08054909B2 Method of selecting candidate vector and method of detecting transmission symbol 有权
标题翻译：选择候选矢量的方法和检测传输符号的方法
公开(公告)号：US08054909B2
公开(公告)日：2011-11-08
申请号：US12141539
申请日：2008-06-18
申请人： Seung Jae Bahng , Jae Kwon Kim , Hoon Heo , Hyun Myung Wu , Youn-Ok Park , Young Jo Bang , Hyeong Sook Park , Hoon Lee , Young Ha Lee , Jung Pil Choi
发明人： Seung Jae Bahng , Jae Kwon Kim , Hoon Heo , Hyun Myung Wu , Youn-Ok Park , Young Jo Bang , Hyeong Sook Park , Hoon Lee , Young Ha Lee , Jung Pil Choi
IPC分类号： H04L27/00 , G06Q30/00
CPC分类号： H04L25/067 , H04L25/03203 , H04L2025/03426
摘要： The present invention relates to a method of detecting a candidate vector and a method of detecting a transmission symbol using the same. According to an embodiment of the present invention, in a multiple input multiple output (MIMO) system using spatial multiplexing (SM), a receiver selects candidate vectors corresponding to a layer located at a last row among a plurality of rearranged layers, and sequentially ranks constellation dots of a next layer for each of the selected candidate vectors. Then, a plurality of arbitrary constellation dots are selected from the ranked constellation dots, accumulated costs of the arbitrary constellation dots are calculated, and a candidate vector is selected in correspondence with a constellation dot having a minimal accumulated cost. Then, a new arbitrary constellation dot is selected in place of the constellation dot selected as the candidate vector, an accumulated cost of the selected arbitrary constellation dot is compared with accumulated costs of the other arbitrary constellation dots, and another candidate vector is selected.
摘要翻译：本发明涉及检测候选向量的方法和使用其的发送符号的检测方法。根据本发明的实施例，在使用空间复用（SM）的多输入多输出（MIMO）系统中，接收机选择与多个重排层中位于最后一行的层相对应的候选向量，并且顺次排列每个所选候选向量的下一层的星座点。然后，从分级星座点中选择多个任意星座点，计算任意星座点的累积成本，并且与具有最小累积成本的星座点对应地选择候选矢量。然后，代替选择为候选矢量的星座点，选择新的任意星座点，将所选择的任意星座点的累积成本与其他任意星座点的累积成本进行比较，并选择另一候选矢量。

9. 发明授权

US07899138B2 Method of detecting space-time code in mobile communication system with 4 Tx antenna 有权
标题翻译：用4个Tx天线检测移动通信系统中的时空码的方法
公开(公告)号：US07899138B2
公开(公告)日：2011-03-01
申请号：US11930013
申请日：2007-10-30
申请人： Young-Jo Bang , Chang-Wahn Yu , Seung-Jae Bahng , Dae-Ho Kim , Youn-Ok Park , Jee-Hwan Ahn , II Min Kim
发明人： Young-Jo Bang , Chang-Wahn Yu , Seung-Jae Bahng , Dae-Ho Kim , Youn-Ok Park , Jee-Hwan Ahn , II Min Kim
IPC分类号： H04L27/06 , H03D1/00
CPC分类号： H04L25/03242 , H04L1/0631
摘要： The present invention relates to a method of detecting a space-time code in a mobile communication system. When detecting a space-time code B for a plurality of transmitting antennas, an ML (maximum likelihood) metric, which is generally calculated by using a specific structure of a matrix B, is defined as a new ML metric by reducing a variable of the ML metric. Two dependent sphere decoding processes are performed and an intersection of the decoding results is calculated, and a signal is detected from the ML metric. Therefore, since detection of the space-time code B for the plurality of transmitting antennas is performed by using the newly defined ML metric, an amount of matrix calculated can be reduced, and a calculation amount can be reduced by performing the two dependent sphere decoding processes. Further, since a detection order of symbols is changed according to a channel situation, it is possible to improve the performance of the system.
摘要翻译：本发明涉及一种在移动通信系统中检测时空码的方法。当检测到多个发射天线的时空码B时，通常通过使用矩阵B的特定结构计算的ML（最大似然度）度量被定义为新的ML度量，通过减少 ML度量。执行两个相关球体解码处理，并且计算解码结果的交点，并且从ML度量检测信号。因此，由于通过使用新定义的ML度量来执行多个发送天线的空时码B的检测，所以可以减少计算出的矩阵的量，并且可以通过执行两个相关球体解码来减少计算量过程。此外，由于符号的检测顺序根据通道情况而改变，因此可以提高系统的性能。

10. 发明授权

US08275053B2 Apparatus and method of estimating channel based on channel delay spread in mobile communication system 有权
标题翻译：基于移动通信系统中的信道延迟扩展估计信道的装置和方法
公开(公告)号：US08275053B2
公开(公告)日：2012-09-25
申请号：US11931188
申请日：2007-10-31
申请人： Young-Jo Bang , Kyung-Yeol Sohn , Youn-Ok Park
发明人： Young-Jo Bang , Kyung-Yeol Sohn , Youn-Ok Park
IPC分类号： H04L27/28
CPC分类号： H04L25/0236 , H04L5/0007 , H04L5/0048 , H04L25/0222 , H04L27/261
摘要： The present invention relates to an apparatus and method of estimating a channel based on a channel delay spread in a mobile communication system. Pilot subcarriers are inserted between data subcarriers at predetermined intervals to estimate a channel at locations of the pilot subcarriers. An approximate channel delay spread value is estimated by using an autocorrelation value of a pilot signal. Then, a channel for data subcarriers between the pilot subcarriers is estimated by using a Wiener finite impulse response (FIR) filter that has a separate coefficient according to the estimated delay spread value. Accordingly, by changing the Wiener FIR filter coefficient according to the delay spread value of the channel, it is possible to estimate the channel so as to be adaptive for a change of the channel over time. Since the filter coefficients, which are calculated in advance, are used, it is possible to reduce the amount of calculation required when calculating the filter coefficients. As a result, an apparatus for estimating a channel can be easily achieved.
摘要翻译：本发明涉及一种基于移动通信系统中的信道延迟扩展来估计信道的装置和方法。导频子载波以预定间隔插入数据子载波之间，以估计导频子载波位置处的信道。通过使用导频信号的自相关值来估计近似信道延迟扩展值。然后，通过使用根据估计的延迟扩展值具有单独系数的维纳有限脉冲响应（FIR）滤波器来估计导频子载波之间的数据子载波的信道。因此，通过根据信道的延迟扩展值改变维纳FIR滤波器系数，可以估计信道，以适应随时间变化的信道。由于使用预先计算的滤波器系数，因此可以减少计算滤波器系数时所需的计算量。结果，可以容易地实现用于估计通道的装置。

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