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1. 发明申请

WO2006076697A3 SELECTING MCS IN A MIMO SYSTEM 审中-公开
公开(公告)号：WO2006076697A3
公开(公告)日：2006-07-20
申请号：PCT/US2006/001452
申请日：2006-01-12
申请人： ATHEROS COMMUNICATIONS, INC. , YE, Huanchun , CHOI, Won-Joon , ZHANG, Ning , GILBERT, Jeffrey, M.
发明人： YE, Huanchun , CHOI, Won-Joon , ZHANG, Ning , GILBERT, Jeffrey, M.
IPC分类号： H04B7/02
摘要： An accurate total error rate performance can be measured using a computed error vector magnitude (EVM) per stream. Using this EVM, the receiver or the transmitter can advantageously generate an optimized modulation and coding scheme (MCS) that corresponds to a specific number of streams, modulation and coding rate for the transmitter. For example, the receiver can compute an SNR from the EVM and then use an SNR vs. MCS table to determine the optimized MCS. In contrast, the transmitter can receive an EVM-to-RSSI mapping and an EVM- to-MCS mapping from the receiver. These mappings and an EVM can facilitate selecting the optimized MCS.

2. 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。

3. 发明申请

WO2005036848A1 APPARATUS AND METHOD TO COMBINE HIGH DATA RATE WIDEBAND PACKETIZED SIGNALS IN A MULTIPLE ANTENNA RECEIVER 审中-公开
标题翻译：在多个天线接收机中组合高数据速率宽带信号封装信号的装置和方法
公开(公告)号：WO2005036848A1
公开(公告)日：2005-04-21
申请号：PCT/US2004/033144
申请日：2004-10-06
申请人： ATHEROS COMMUNICATIONS, INC. , TEHRANI, Ardavan, M. , CHOI, Won-Joon , GILBERT, Jeffrey, M. , WANG, Yi Hsiu
发明人： TEHRANI, Ardavan, M. , CHOI, Won-Joon , GILBERT, Jeffrey, M. , WANG, Yi Hsiu
IPC分类号： H04L27/26
CPC分类号： H04L27/2657 , H04B7/0845 , H04B7/0848 , H04L27/2663 , H04L27/2665 , H04L27/2675
摘要： The present invention provides an apparatus and method of multiple antenna receiver combining of high data rate wideband packetized wireless communication signals, where the apparatus includes M receive antennas, receiving M high data rate wideband packetized wireless communication signals, where each of the signals includes N frequency bins. The apparatus, in an exemplary embodiment, includes (1) a joint timing recovery units that perform joint coarse signal timing estimation, joint frequency offset estimation, and joint fine timing estimation on each of the signals, (2) M Fast Fourier Transform units (FFTs) that each convert the digital data for each of the M signals into frequency domain information for each of the N received frequencies and that output Q pilots for each of the signals, where Q is a positive integer, and (3) a combiner that weights and combines the outputs of the M FFTs for each of the N received frequencies.
摘要翻译：本发明提供了一种多天线接收机组合的高数据率宽带分组化无线通信信号的装置和方法，其中该装置包括M个接收天线，接收M个高数据速率宽带分组化无线通信信号，其中每个信号包括N个频率箱。在一个示例性实施例中，该装置包括（1）关于每个信号执行联合粗略信号定时估计，联合频率偏移估计和联合精细定时估计的联合定时恢复单元，（2）M个快速傅里叶变换单元 FFT），其将每个M个信号的数字数据转换为N个接收频率中的每一个的频域信息，并且为每个信号输出Q个导频，其中Q是正整数，以及（3）组合器，对N个接收频率中的每一个进行加权并组合M FFT的输出。

4. 发明申请

WO2005029749A2 SPUR MITIGATION TECHNIQUES 审中-公开
标题翻译： SPUR减缓技术
公开(公告)号：WO2005029749A2
公开(公告)日：2005-03-31
申请号：PCT/US2004/030315
申请日：2004-09-15
申请人： ATHEROS COMMUNICATIONS, INC. , CHOI, Won-Joon , GILBERT, Jeffrey, M. , WANG, Yi-Hsiu , ZHANG, Xiaoru
发明人： CHOI, Won-Joon , GILBERT, Jeffrey, M. , WANG, Yi-Hsiu , ZHANG, Xiaoru
IPC分类号： H04L
CPC分类号： H04L25/0232 , H04L1/0045 , H04L27/2647
摘要： Spurs cause significant problems with signal detecting, amplifier gain adjustment, and signal decoding. Various techniques can be used to mitigate the effects of spurs on a received signal. Generally, these techniques work by either canceling or ignoring the spurs. For example, a pilot mask can be used to ignore pilot information in one or more sub-channels. A Viterbi mask can determine the weighting given to bits in a sub-channel based on spur and data rate information. Channel interpolation can compute a pseudo channel estimate for a sub-channel known to have a spur location can be computed by interpolating the channel estimates of adjacent good sub-channels. Filtering of the received signal using a low-pass filter, a growing box filter, or a low-pass filter with self-correlation can be used to cancel a spur.
摘要翻译：马刺在信号检测，放大器增益调整和信号解码方面造成重大问题。可以使用各种技术来减轻杂散对接收信号的影响。一般来说，这些技术通过取消或忽略杂散来工作。例如，可以使用导频掩码来忽略一个或多个子信道中的导频信息。维特比掩码可以基于支线和数据速率信息来确定子信道中的比特的加权。信道内插可以计算已知具有支路位置的子信道的伪信道估计，可以通过内插相邻的良好子信道的信道估计来计算。使用低通滤波器，增长盒滤波器或具有自相关的低通滤波器对接收信号进行滤波可以用于取消杂散。

5. 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.

6. 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。

7. 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。

8. 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。

9. 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。

10. 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。

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