专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2007082280A2 OFDMA DEVICE AND METHOD OF CORRECTING FREQUENCY OFFSET IN OFDMA SIGNALS 审中-公开
标题翻译： OFDMA设备和在OFDMA信号中校正频率偏移的方法
公开(公告)号：WO2007082280A2
公开(公告)日：2007-07-19
申请号：PCT/US2007/060414
申请日：2007-01-11
申请人： AMICUS WIRELESS TECHNOLOGY LTD. , ZENG, Chaohuang , CHOI, Won-Joon , YANG, Jingnong
发明人： ZENG, Chaohuang , CHOI, Won-Joon , YANG, Jingnong
IPC分类号： H04K1/10
CPC分类号： H04L27/266 , H04L5/023 , H04L27/2659 , H04L27/2662 , H04L27/2675
摘要： An Orthogonal Frequency Division Multiple Access (OFDMA) device and method of correcting frequency offset in OFDMA signals computes an estimated frequency offset, which is used for mixing an incoming OFDMA signal with a frequency offset-compensated mixer signal and for digitally correcting sampling errors in the signal.
摘要翻译：正交频分多址（OFDMA）设备和OFDMA信号中的频偏校正方法计算估计的频偏，其用于混合输入OFDMA信号与频偏补偿混频器信号，并用于数字校正采样误差信号。

2. 发明申请

WO2007082286A2 DEVICE AND METHOD FOR PERFORMING CHANNEL ESTIMATION FOR OFDM-BASED SIGNALS WITH VARIABLE PILOT SUBCARRIER SPACING 审中-公开
标题翻译：用于基于OFDM的信号进行信道估计的设备和方法，其具有可变引导子载波间隔
公开(公告)号：WO2007082286A2
公开(公告)日：2007-07-19
申请号：PCT/US2007/060421
申请日：2007-01-11
申请人： AMICUS WIRELESS TECHNOLOGY LTD. , SONG, Kee-bong , ZENG, Chaohuang , CHOI, Won-Joon
发明人： SONG, Kee-bong , ZENG, Chaohuang , CHOI, Won-Joon
IPC分类号： H04J11/00
CPC分类号： H04W24/00 , H04L5/0007 , H04L5/0048 , H04L25/0226 , H04L25/0232 , H04W48/08
摘要： A device and method for performing channel estimation for an OFDM- based wireless communication system modifies pilot subcarrier spacing to use a set of interpolation coefficients associated with a different pilot subcarrier spacing.
摘要翻译：用于对基于OFDM的无线通信系统执行信道估计的装置和方法修改导频子载波间隔以使用与不同导频子载波间隔相关联的一组内插系数。

3. 发明申请

WO2008148078A3 OFDM-BASED DEVICE AND METHOD FOR PERFORMING SYNCHRONIZATION IN THE PRESENCE OF INTERFERENCE SIGNALS 审中-公开
公开(公告)号：WO2008148078A3
公开(公告)日：2008-12-04
申请号：PCT/US2008/064839
申请日：2008-05-27
申请人： AMICUS WIRELESS TECHNOLOGY LTD. , YANG, Jingnong , CHOI, Won-Joon
发明人： YANG, Jingnong , CHOI, Won-Joon
IPC分类号： H04B1/00
摘要： An OFDM-based device and method for performing synchronization utilizes a time-domain preamble of an incoming OFDM-based signal to compute an estimated fine frequency offset. The computation of the estimated fine frequency offset involves multiplying values of the time-domain preamble with conjugates of corresponding values of a selected base station time-domain preamble, averaging the resulting multiplied values in predefined segments and self-correlating the resulting averaged values to derive a self-correlation value, which is used to compute the estimated fine frequency offset.

4. 发明申请

WO2008148082A1 SOFT-BIT DE-MAPPING DEVICE AND METHOD OF GENERATING SOFT BITS FOR DECODING 审中-公开
标题翻译：软位置去映像器件及其生成软件位置解码方法
公开(公告)号：WO2008148082A1
公开(公告)日：2008-12-04
申请号：PCT/US2008/064848
申请日：2008-05-27
申请人： AMICUS WIRELESS TECHNOLOGY LTD. , GHO, Gwang-Hyun , SONG, Kee-Bong , CHOI, Won-Joon
发明人： GHO, Gwang-Hyun , SONG, Kee-Bong , CHOI, Won-Joon
IPC分类号： G06F11/00
CPC分类号： H04L1/0045 , H04L1/0052 , H04L5/0007 , H04L25/067 , H04L27/2647 , H04L27/38 , H04L2025/03401 , H04L2025/03414 , H04L2025/0342
摘要： A soft-bit de-mapping device and method of generating soft bits for decoding quantizes a log-likelihood ratio (LLR) value for a received value using functions bits and channel parameter bits to generate the soft bits. The function bits are generated by quantizing an LLR function for the received value, which includes modifying an original curve of the LLR function to a modified curve such that a segment of the original curve with the lowest slope is protected in the modified curve for a fixed equal quantization step size. The channel parameter bits are generated by quantizing a channel parameter for the received value to generate channel.
摘要翻译：产生软比特的软位解映射设备和方法用于使用功能位和信道参数比特量化接收值的对数似然比（LLR）值，以产生软比特。功能位通过量化接收值的LLR函数而产生，其包括将LLR函数的原始曲线修改为修改曲线，使得具有最低斜率的原始曲线的段在修改曲线中被保护用于固定的等量化步长。通过对接收到的值的信道参数进行量化以产生信道来生成信道参数位。

5. 发明申请

WO2008137845A1 SYSTEM AND METHOD FOR PERFORMING A HARQ OPERATION IN AN OFDM-BASED RECEIVER 审中-公开
标题翻译：用于在基于OFDM的接收机中执行HARQ操作的系统和方法
公开(公告)号：WO2008137845A1
公开(公告)日：2008-11-13
申请号：PCT/US2008/062657
申请日：2008-05-05
申请人： AMICUS WIRELESS TECHNOLOGY LTD. , GHO, Gwang-hyun , SONG, Kee-Bong , CHOI, Won-Joon
发明人： GHO, Gwang-hyun , SONG, Kee-Bong , CHOI, Won-Joon
IPC分类号： H04J11/00
CPC分类号： H04L25/067 , H04L1/1845 , H04L5/0007
摘要： A system and method for performing a HARQ operation in an OFDM- based receiver utilizes a linked list scheme for a HARQ buffer, which is used to store soft information for HARQ entities with decoding errors. The device and method also combine soft information of a particular HARQ entity with previous updated soft information of the particular HARQ entity using a combined scaling factor that depends on a current scaling factor and a previous combined scaling factor.
摘要翻译：用于在基于OFDM的接收机中执行HARQ操作的系统和方法利用用于HARQ缓冲器的链路列表方案，其用于存储具有解码错误的HARQ实体的软信息。所述设备和方法还使用取决于当前缩放因子和先前组合缩放因子的组合缩放因子将特定HARQ实体的软信息与特定HARQ实体的先前更新的软信息组合。

6. 发明申请

WO2008137856A1 CHANNEL ESTIMATION FOR OFDM-BASED WIRELESS COMMUNICATION SYSTEM USING SPARSELY SPACED PILOT SUBCARRIERS 审中-公开
标题翻译：基于OFDM的无线通信系统的信道估计使用SPARSELY SPACED PILOT SUBCARRIERS
公开(公告)号：WO2008137856A1
公开(公告)日：2008-11-13
申请号：PCT/US2008/062671
申请日：2008-05-05
申请人： AMICUS WIRELESS TECHNOLOGY LTD. , SONG, Kee-Bong , CHOI, Won-Joon
发明人： SONG, Kee-Bong , CHOI, Won-Joon
IPC分类号： H04Q7/00
CPC分类号： H04L25/0204 , H04L25/0232
摘要： A device and method for performing a channel estimation for an OFDM-based wireless communication system using sparsely spaced pilot subcarriers estimates missing pilot subcarriers in an interpolation window using pilot subcarriers that are outside of the interpolation window to produce estimated pilot subcarriers for the interpolation window. The pilot subcarriers in the interpolationwindow and the estimated pilot subcarrier are used to compute pilot channelestimates for the interpolation window, which are then used to derive data channel estimates for the interpolation window.
摘要翻译：使用稀疏间隔的导频子载波对基于OFDM的无线通信系统进行信道估计的装置和方法使用在内插窗口之外的导频子载波来估计内插窗口中的缺失导频子载波，以产生插值窗口的估计导频子载波。内插窗口中的导频子载波和估计的导频子载波用于计算插值窗口的导频信道估计，然后将其用于导出内插窗口的数据信道估计。

7. 发明申请

WO2008137852A1 TURBO DECODING A DOUBLE-BINARY CIRCULAR RECURSIVE SYSTEMATIC CONVOLUTIONAL ENCODED SIGNAL 审中-公开
标题翻译：涡轮解码双重二进制循环系统转换编码信号
公开(公告)号：WO2008137852A1
公开(公告)日：2008-11-13
申请号：PCT/US2008/062666
申请日：2008-05-05
申请人： AMICUS WIRELESS TECHNOLOGY LTD. , GHO, Gwang-Hyun , CHOI, Won-Joon
发明人： GHO, Gwang-Hyun , CHOI, Won-Joon
IPC分类号： G06F15/00
CPC分类号： H04L1/0041 , H04L1/005 , H04L1/0066
摘要： A Turbo decoder and method for decoding a double -binary circular recursive systematic convolutional (DBCRSC) encoded signal with unknown initial and final states executes iterations of forward and backward recursion on a payload block of the DBCRSC encoded signal and a padded block using an estimated forward state metric (FSM) and an estimated backward state metric (BSM), which are updated at one or more iterations.
摘要翻译：用于解码具有未知初始和最终状态的双二进制循环递归系统卷积（DBCRSC）编码信号的Turbo解码器和方法在DBCRSC编码信号的有效载荷块上执行正向和反向递归的迭代，并且使用估计的前向状态度量（FSM）和估计的向后状态度量（BSM），其在一个或多个迭代中被更新。

8. 发明申请

WO2008137837A1 AUTOMATIC GAIN CONTROL CIRCUIT FOR MIMO OFDM RECEIVER 审中-公开
标题翻译： MIMO OFDM接收机的自动增益控制电路
公开(公告)号：WO2008137837A1
公开(公告)日：2008-11-13
申请号：PCT/US2008/062645
申请日：2008-05-05
申请人： AMICUS WIRELESS TECHNOLOGY LTD. , ZHU, Mingrui , GHO, Gwang-Hyun , CHOI, Won-Joon
发明人： ZHU, Mingrui , GHO, Gwang-Hyun , CHOI, Won-Joon
IPC分类号： H04L27/08
CPC分类号： H04L27/2647 , H03G3/3078
摘要： An automatic gain control (AGC) circuit and method for performing AGC for an orthogonal frequency-division multiplexing (OFDM) receiver measures signal power of input digital signals that are derived from incoming data frames with preambles to produce gain change signals when the signal power differs from a reference target power level. The gain of an amplifier of the OFDM receiver is changed in response to the gain change signals until a preamble of the data frames is detected for the first time. The gain of the amplifier of the OFDM receiver is further changed in response to the gain change signals, after the preamble is detected, only during periods when the preambles of the data frames are being processed by the OFDM receiver such that the gain of the amplifier is not changed during periods when other portions of the data frames are being processed by the OFDM receiver.
摘要翻译：用于对正交频分复用（OFDM）接收机执行AGC的自动增益控制（AGC）电路和方法测量输入数字信号的信号功率，该输入数字信号从具有前同步码的输入数据帧导出，以在信号功率不同时产生增益改变信号从参考目标功率水平。 OFDM接收机的放大器的增益响应于增益变化信号而改变，直到第一次检测到数据帧的前导码为止。 OFDM接收机的放大器的增益在检测到前导码之后响应于增益改变信号进一步改变，仅在OFDM接收器正在处理数据帧的前导码的时段期间，使得放大器的增益在数据帧的其他部分正在被OFDM接收机处理的期间不改变。

9. 发明申请

WO2005046113A2 MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM AND METHOD 审中-公开
标题翻译：多输入多输出系统及方法
公开(公告)号：WO2005046113A2
公开(公告)日：2005-05-19
申请号：PCT/US2004/036886
申请日：2004-11-04
申请人： ATHEROS COMMUNICATIONS, INC. , SUN, Qinfang , CHOI, Won-Joon , GILBERT, Jeffrey M. , TEHRANI, Ardavan Maleki
发明人： SUN, Qinfang , CHOI, Won-Joon , GILBERT, Jeffrey M. , TEHRANI, Ardavan Maleki
IPC分类号： H04L
CPC分类号： H04B7/0421 , H04B7/0413 , H04B7/0613 , H04B7/0684 , H04L1/0041 , H04L1/0054 , H04L1/0061 , H04L1/06 , H04L1/0656 , H04L1/1819 , H04L1/1829 , H04L5/0048 , H04L25/0204 , H04L25/0226 , H04L27/0014 , H04L2025/03426
摘要： A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may "stomp" on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.
摘要翻译：多输入多输出（MIMO）系统可以同时在多个天线上进行发射并同时在多个天线上进行接收。不幸的是，由于遗留802.11a / g设备不能解码多个数据流，所以这样的传统设备可能在MIMO分组的传输完成之前通过发送在MIMO分组上“踩踏”。因此，本文提供MIMO系统和方法，以允许传统设备对MIMO分组的长度进行解码并且在该时间段内抑制发射。这些MIMO系统和方法被优化用于MIMO分组的有效传输。

10. 发明申请

WO2005036775A4 APPARATUS AND METHOD OF MULTIPLE ANTENNA TRANSMITTER BEAMFORMING OF HIGH DATA RATE WIDEBAND PACKETIZED WIRELESS COMMUNICATION SIGNALS 审中-公开
公开(公告)号：WO2005036775A4
公开(公告)日：2005-04-21
申请号：PCT/US2004/033081
申请日：2004-10-06
申请人： ATHEROS COMMUNICATIONS, INC. , CHOI, Won-Joon , TEHRANI, Ardavan, M. , GILBERT, Jeffrey, M. , NG, Samuel
发明人： CHOI, Won-Joon , TEHRANI, Ardavan, M. , GILBERT, Jeffrey, M. , NG, Samuel
IPC分类号： H04B7/06 , H04L27/26
摘要： The present invention provides an apparatus and method of multiple antenna transmitter beamforming of high data rate wideband packetized wireless communication signals, where each of the signals comprises N frequencies, where N is a positive integer. The apparatus, in an exemplary embodiment, includes (1) a transmit beamformer (220) that co-phases and weights the signals for each of the N frequencies across M antennas, thereby generating M co-phased and weighted frequency data and M Inverse Fast Fourier Transform units (IFFTs 230, 232) that convert the M co-phased and weighted frequency data into M digital outputs, and M transmit antennas (260, 262) transmitting the M co-phased and weighted signals, where M is an integer greater than or equal to 2.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式