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

WO2003015306A1 METHODS AND APPARATUS FOR SELECTIVE DEMODULATION AND DECODING OF COMMUNICATIONS SIGNALS 审中-公开
标题翻译：用于选择性解调和解码通信信号的方法和装置
公开(公告)号：WO2003015306A1
公开(公告)日：2003-02-20
申请号：PCT/US2002/024705
申请日：2002-08-06
申请人： ERICSSON INC. , DAHLMAN, Erik , WANG, Yi-Pin, Eric , DENT, Paul, Wilkinson , BOTTOMLEY, Gregory, Edward , KHAYRALLAH, Ali, S. , OSTBERG, Christer
发明人： DAHLMAN, Erik , WANG, Yi-Pin, Eric , DENT, Paul, Wilkinson , BOTTOMLEY, Gregory, Edward , KHAYRALLAH, Ali, S. , OSTBERG, Christer
IPC分类号： H04B1/707
CPC分类号： H04B1/7115 , H04B1/7075 , H04B1/709 , H04B1/712 , H04B2201/7071 , H04B2201/709727
摘要： A spread spectrum signal is processed by correlating the spread spectrum signal with a spreading sequence at a first plurality of correlation times to produce a first plurality of time-offset correlations. The first plurality of time-offset correlations is processed to produce a first symbol representation for a symbol. A first quality is determined for the first symbol representation. Responsive to the determined first quality, it is determined whether to further process the first symbol representation or to process a second symbol representation for the symbol generated from the spread spectrum signal. The first quality may be determined, for example, by decoding the first symbol representations to generate a decoding metric or error check indicator, such as a CRC result. The symbol representations may be generated and/or evaluated for quality in a serial fashion or a parallel fashion.
摘要翻译：通过在第一多个相关时间将扩展频谱信号与扩频序列相关来处理扩展频谱信号，以产生第一多个时间偏移相关。处理第一多个时间偏移相关以产生符号的第一符号表示。确定第一个符号表示的第一个质量。响应于确定的第一质量，确定是否进一步处理第一符号表示或处理从扩频信号产生的符号的第二符号表示。可以例如通过对第一符号表示进行解码以产生诸如CRC结果的解码度量或错误检查指示符来确定第一质量。符号表示可以以串行方式或并行方式生成和/或评估质量。

2. 发明申请

WO2005055457A1 METHOD AND APPARATUS FOR DS-CDMA INTERFERENCE SUPPRESSION USING CODE-SPECIFIC COMBINING 审中-公开
标题翻译：使用代码特定组合的DS-CDMA干扰抑制的方法和装置
公开(公告)号：WO2005055457A1
公开(公告)日：2005-06-16
申请号：PCT/US2004/038030
申请日：2004-11-12
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , FULGHAM, Tracy, L. , BOTTOMLEY, Gregory, Edward , WANG, Yi-Pin, Eric , KHAYRALLAH, Ali, S.
发明人： FULGHAM, Tracy, L. , BOTTOMLEY, Gregory, Edward , WANG, Yi-Pin, Eric , KHAYRALLAH, Ali, S.
IPC分类号： H04B1/707
CPC分类号： H04B1/7107 , H04B1/712 , H04B2201/709727 , H04J13/0048
摘要： Interference, such as inter-symbol interference, from a symbol of interest in a RAKE receiver (200) is reduced. The RAKE receiver comprises a plurality of RAKE fingers (220), a processor (230), and a combiner (232). The plurality of RAKE fingers despread symbols received over multiple paths of a multi-path channel. The processor determines cross-correlations between symbol waveforms from different symbols and multiple paths. The combiner combines the despread symbols using the cross-correlations to reduce interference from the symbol of interest.
摘要翻译：来自RAKE接收机（200）中感兴趣的符号的干扰（例如符号间干扰）被减少。 RAKE接收机包括多个RAKE指（220），处理器（230）和组合器（232）。多个RAKE手指解扩在多路径信道的多个路径上接收的符号。处理器确定来自不同符号和多个路径的符号波形之间的互相关。组合器使用互相关组合解扩符号，以减少来自感兴趣符号的干扰。

3. 发明申请

WO2002071629A2 METHODS AND SYSTEMS FOR SELECTIVE FREQUENCY HOPPING IN MULTIPLE MODE COMMUNICATION SYSTEMS 审中-公开
标题翻译：用于多模式通信系统中选择性跳频跳跃的方法和系统
公开(公告)号：WO2002071629A2
公开(公告)日：2002-09-12
申请号：PCT/US2002/003438
申请日：2002-02-06
申请人： ERICSSON INC , KHAYRALLAH, Ali, S. , BOTTOMLEY, Gregory, Edward
发明人： KHAYRALLAH, Ali, S. , BOTTOMLEY, Gregory, Edward
IPC分类号： H04B
CPC分类号： H04L1/0015 , H04B1/713 , H04B7/2621 , H04L1/0001 , H04L1/0003 , H04L1/0009
摘要： Methods and systems for selecting a frequency hopping mode for a communication in a communication system having a plurality of transmission schemes are provided. One of the plurality of transmission schemes to be used for the communication is determined. One of a plurality of candidate frequency hopping modes is selected as the frequency hopping mode for the communication based on the determined transmission scheme for the communication. Methods and systems for transmitting a communication packet in a communication system having a plurality of transmission schemes are also provided.
摘要翻译：提供了用于为具有多种传输方案的通信系统中的通信选择跳频模式的方法和系统。确定要用于通信的多个传输方案之一。基于所确定的通信传输方案，选择多个候选跳频模式中的一个作为通信的跳频模式。还提供了用于在具有多种传输方案的通信系统中传输通信分组的方法和系统。

4. 发明申请

WO2002051087A3 METHODS AND SYSTEMS FOR EXTRACTING A JOINT PROBABILITY FROM A MAP DECISION DEVICE AND PROCESSING A SIGNAL USING THE JOINT PROBABILITY INFORMATION 审中-公开
公开(公告)号：WO2002051087A3
公开(公告)日：2002-06-27
申请号：PCT/US2001/046036
申请日：2001-11-15
申请人： ERICSSON INC. , KHAYRALLAH, Ali, S. , BOTTOMLEY, Gregory, Edward
发明人： KHAYRALLAH, Ali, S. , BOTTOMLEY, Gregory, Edward
IPC分类号： H04L1/00
摘要： Methods and devices for extracting a joint probability from a MAP decision device are provided. Probability information associated with a first symbol and a second symbol is obtained from the MAP decision device. A joint probability of the first symbol and the second symbol is determined from the probability information associated with the first symbol and the second symbol. Methods and devices for processing a signal containing information associated with a plurality of transmitted bits using the generated joint probability information are also provided. The MAP decision device in various embodiments is a demodulator or a decoder.

5. 发明申请

WO2011128805A1 CHANNEL ESTIMATION FOR EQUALIZER USING SERIAL LOCALIZATION WITH INDECISION 审中-公开
标题翻译：使用串行本地化的均衡器的通道估计
公开(公告)号：WO2011128805A1
公开(公告)日：2011-10-20
申请号：PCT/IB2011/051444
申请日：2011-04-05
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KHAYRALLAH, Ali, S. , PARK, Chester , WANG, Yi-Pin, Eric
发明人： KHAYRALLAH, Ali, S. , PARK, Chester , WANG, Yi-Pin, Eric
IPC分类号： H04L27/38 , H04L27/34
CPC分类号： H04L27/38 , H04L25/0242 , H04L25/03229 , H04L27/3416 , H04L2025/03388 , H04L2025/03414
摘要： A multi-stage equalizer implementing a low complexity sequence estimation technique referred to as serial localization with indecision (SLI). The multi-stage equalizer includes a plurality of stages including one or more preliminary stages and a final stage. Each stage includes a demodulator that simultaneously equalizes and demodulates an input signal to generate an intermediate sequence estimate comprising a sequence of intermediate symbol estimates. The preliminary stages further include a signal generator to generate the input signal to the next stage. The signal generator includes a modulator to re -modulate the intermediate symbol estimates generated in the same stage and a combiner to subtract the re -modulated symbols from the input signal to generate a residual signal for input to the next stage. The signal generator is not needed in the final stage. A combiner adds the intermediate sequence estimates produced in each stage to produce the final sequence estimate. The combiner may be implemented as a single combiner or as multiple combiners to generate cumulative intermediate symbols estimates at each stage. These intermediate symbol estimates can be used as affective pilot symbols to improve channel estimation for later stages.
摘要翻译：实现低复杂度序列估计技术的多级均衡器被称为具有不确定性的串行定位（SLI）。多级均衡器包括多个级，包括一个或多个初级和最后级。每个级包括解调器，其同时均衡和解调输入信号以产生包括中间符号估计序列的中间序列估计。初级阶段还包括一个信号发生器，用于产生到下一级的输入信号。信号发生器包括用于重新调制在同一级产生的中间符号估计的调制器和组合器，以从输入信号中减去重新调制的符号，以产生用于输入到下一级的残余信号。在最后阶段不需要信号发生器。组合器将在每个阶段产生的中间序列估计值加上以产生最终序列估计。组合器可以被实现为单个组合器或多个组合器，以在每个阶段产生累积中间符号估计。这些中间符号估计可以用作情感导频符号，以改进后期阶段的信道估计。

6. 发明申请

WO2003030478A1 METHOD AND APPARATUS FOR CANCELLING CO-CHANNEL INTERFERENCE IN A RECEIVING SYSTEM USING SPATIO-TEMPORAL WHITENING 审中-公开
标题翻译：在采用空白白昼的接收系统中消除共通道干扰的方法和装置
公开(公告)号：WO2003030478A1
公开(公告)日：2003-04-10
申请号：PCT/US2002/025848
申请日：2002-08-14
申请人： ERICSSON, INC. , ARSLAN, Huseyin , KHAYRALLAH, Ali, S.
发明人： ARSLAN, Huseyin , KHAYRALLAH, Ali, S.
IPC分类号： H04L25/03
CPC分类号： H04L25/03006 , H04L25/03267 , H04L25/03993 , H04L2025/03426 , H04W56/001 , H04W92/10
摘要： Methods and apparatus for canceling co-channel interference in a receiving system using spatio-temporal whitening. In some embodiments, a spatio-temporal interference canceling method, and apparatus for carrying out the method are provided which effectively cancel co-channel interference despite fre-quency offset between the desired signal and the interferer in a TDMA type sys-tem. Real and imaginary component values of the total received signal are used for virtual diversity branches, and a vector-valued auto regressive model (402, 1302) is used to characterize the interference. In other embodiments, spatio-temporal interference whitening (1603, 1703) is used to improve timing estimates used for synchronization. The two uses of spatio-temporal whitening can be com-bined in one receiver. The invention is typically implemented in one or more pro-grammed digital signal processors or application specific integrated circuits (ASICS), embodied in a receiving system.
摘要翻译：用于消除接收系统中使用时空增白的同信道干扰的方法和装置。在一些实施例中，提供了一种用于执行该方法的时空干扰消除方法和装置，其有效地抵消了TDMA类型系统中所需信号与干扰源之间的频率偏移的同信道干扰。总接收信号的实分量值和虚分量值用于虚拟分集分支，并且使用向量值自回归模型（402,1302）来表征干扰。在其他实施例中，使用空间 - 时间干扰白化（1603,1703）来改善用于同步的定时估计。时空美白的两种用途可以在一个接收器中进行组合。本发明通常在一个或多个编程的数字信号处理器或专用集成电路（ASICS）中实现，体现在接收系统中。

7. 发明申请

WO2002082833A1 SHORT-TERM AND LONG-TERM CHANNEL CHARACTERISTICS 审中-公开
标题翻译：短期和长期通道特性
公开(公告)号：WO2002082833A1
公开(公告)日：2002-10-17
申请号：PCT/US2002/008072
申请日：2002-03-18
申请人： ERICSSON, INC. , ARSLAN, Huseyin , MOLNAR, Karl, J. , BOTTOMLEY, Gregory, E. , KHAYRALLAH, Ali, S.
发明人： ARSLAN, Huseyin , MOLNAR, Karl, J. , BOTTOMLEY, Gregory, E. , KHAYRALLAH, Ali, S.
IPC分类号： H04Q7/00
CPC分类号： H04L1/20
摘要： A communications system and method for compensating for an interferer signal in a received signal comprising a radio processor for filtering the received signal (310), and a demodulator (320) coupled to the radio processor for demodulating the filtered received signal. A channel quality estimator (330) coupled to the demodulator determines a channel characteristic based on instantaneous noise values of the received signal, for controlling the demodulation of the received signal to compensate for the interferer signal responsive to the channel characteristic. Further, where the channel characteristic is a first channel characteristic, the channel quality estimator determines a second channel characteristic based on instantaneous noise values of the received signal and controls demodulation of the received signal to compensate for the interferer signal responsive to the first and the second channel characteristics.
摘要翻译：一种用于补偿接收信号中的干扰信号的通信系统和方法，包括用于对接收信号进行滤波的无线电处理器（310），以及耦合到无线电处理器的用于解调滤波的接收信号的解调器（320）。耦合到解调器的信道质量估计器（330）基于接收信号的瞬时噪声值来确定信道特性，用于响应于信道特性来控制接收信号的解调以补偿干扰信号。此外，在信道特性是第一信道特性的情况下，信道质量估计器基于接收信号的瞬时噪声值来确定第二信道特性，并且控制接收信号的解调以补偿响应于第一和第二信号的干扰信号通道特性。

8. 发明申请

WO2010073096A1 FEEDFORWARD RECEIVER AND METHOD FOR REDUCING INTER-SYMBOL INTERFERENCE BY USING COUPLING BETWEEN BITS OR SYMBOLS 审中-公开
标题翻译：前馈接收器和通过使用位置或符号之间的耦合来减少同步间干扰的方法
公开(公告)号：WO2010073096A1
公开(公告)日：2010-07-01
申请号：PCT/IB2009/007842
申请日：2009-12-21
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KHAYRALLAH, Ali, S.
发明人： KHAYRALLAH, Ali, S.
IPC分类号： H04L25/03
CPC分类号： H04L25/03286 , H04L1/0048 , H04L1/005 , H04L25/03318
摘要： A feedforward receiver and method are described herein that address inter-symbol interference in received symbols by using an enhanced equalizer to generate joint soft values (joint information of a previous modem bit x' and a modem bit x) and an enhanced decoder which uses the joint soft values and side information (bias about the previous modem bit x') to output a more reliable information bit x.
摘要翻译：本文描述了一种前馈接收器和方法，其通过使用增强均衡器来产生联合软值（先前的调制解调器位x'和调制解调器位x的联合信息）和增强解码器来解决接收到的符号中的符号间干扰，联合软值和侧信息（关于先前的调制解调器位x'的偏置）以输出更可靠的信息位x。

9. 发明申请

WO2012127364A1 SIGNAL COMPRESSION FOR BACKHAUL COMMUNICATIONS USING LINEAR TRANSFORMATIONS 审中-公开
标题翻译：使用线性变换的反向通信的信号压缩
公开(公告)号：WO2012127364A1
公开(公告)日：2012-09-27
申请号：PCT/IB2012/051192
申请日：2012-03-14
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , HUI, Dennis , CHENG, Jung-Fu , GUEY, Jiann-Ching , KHAYRALLAH, Ali, S. , WONG, Shing-Wa
发明人： HUI, Dennis , CHENG, Jung-Fu , GUEY, Jiann-Ching , KHAYRALLAH, Ali, S. , WONG, Shing-Wa
IPC分类号： H04B7/02 , H03M7/30
CPC分类号： H04B7/024 , H03M7/3068 , H03M7/3082
摘要： A compression/decompression method for backhaul communication of a complex-valued radio signal between base stations and the network processing unit, such as a Central Processor of a Coordinated Multipoint (CoMP) system, significantly reduces backhaul bandwidth. The spatial and temporal correlations of the wireless IQ signal are exploited in order to remove redundancy and substantially reduce signal bandwidth. Feature component signals of significance are extracted through linear transformation to form the radio signal, and are individually quantized, possibly at different bit rates in accordance with their relative importance. The transformation can either be pre-determined or computed in real-time based on the spatial and temporal statistics of the radio signal. In the latter case, the transformation matrix or matrices are also sent over the backhaul in order to allow the radio signal to be reconstructed at the receiving end. Different methods of generating the transformation matrices are proposed.
摘要翻译：用于基站和诸如协调多点（CoMP）系统的中央处理器的网络处理单元之间的复数无线电信号的回程通信的压缩/解压缩方法显着地减少了回程带宽。利用无线IQ信号的空间和时间相关性来消除冗余并显着降低信号带宽。通过线性变换提取有意义的特征分量信号以形成无线电信号，并且可以根据其相对重要性以不同的比特率单独量化。可以基于无线电信号的空间和时间统计来实时地进行转换或者实时地进行转换。在后一种情况下，转换矩阵或矩阵也通过回程发送，以允许在接收端重建无线电信号。提出了生成转换矩阵的不同方法。

10. 发明申请

WO2005060119A1 METHOD FOR PATH SEARCHING AND VERIFICATION 审中-公开
标题翻译：路径搜索和验证方法
公开(公告)号：WO2005060119A1
公开(公告)日：2005-06-30
申请号：PCT/US2004/042494
申请日：2004-12-15
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , KHAYRALLAH, Ali, S. , COZZO, Carmela , BOTTOMLEY, Gregory, E.
发明人： KHAYRALLAH, Ali, S. , COZZO, Carmela , BOTTOMLEY, Gregory, E.
IPC分类号： H04B1/707
CPC分类号： H04B1/707 , H04B1/7117 , H04B2201/709727
摘要： The present application describes a new path search and verification method and apparatus for identifying and selecting one or more delays for a receiver. A front-end receiver receives a signal having one or more signal images, where each signal image has a corresponding signal delay. A tree generator builds a hierarchical delay tree from a plurality of delay nodes, each corresponding to one of the signal delays. A tree searcher searches through the delay tree to identify one or more surviving delay nodes, where each surviving delay node corresponds to a candidate delay for the receiver. The receiver may also include a state machine comprising a plurality of ordered states for providing candidate delays for the receiver. The state machine stores the candidate delays and shifts the candidate delays between states within the state machine based on the latest results from the tree searcher.
摘要翻译：本申请描述了用于识别和选择接收机的一个或多个延迟的新的路径搜索和验证方法和装置。前端接收器接收具有一个或多个信号图像的信号，其中每个信号图像具有对应的信号延迟。树生成器从多个延迟节点构建分层延迟树，每个延迟节点对应于一个信号延迟。树搜索器通过延迟树搜索以识别一个或多个幸存延迟节点，其中每个存活延迟节点对应于接收机的候选延迟。接收机还可以包括状态机，其包括用于为接收机提供候选延迟的多个有序状态。状态机根据树搜索器的最新结果存储候选延迟并在状态机内状态之间移动候选延迟。

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