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1. 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。

2. 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。

3. 发明申请

WO2002069493A2 AUTOMATIC FREQUENCY CONTROL SYSTEMS AND METHODS FOR JOINT DEMODULATION 审中-公开
标题翻译：自动频率控制系统和联合解调方法
公开(公告)号：WO2002069493A2
公开(公告)日：2002-09-06
申请号：PCT/US2001/046721
申请日：2001-10-19
申请人： ERICSSON INC , MOLNAR, Karl, J. , HAFEEZ, Abdulrauf , ARSLAN, Huseyin
发明人： HAFEEZ, Abdulrauf , ARSLAN, Huseyin
IPC分类号： H03J7/04
CPC分类号： H03J7/04 , H04L25/0204 , H04L25/03331 , H04L25/03337
摘要： A joint demodulator is configured to generate an estimated first frequency or first frequency error for the first signal and an estimated second frequency or second frequency error for the second signal. A first long-term automatic frequency control is responsive to the estimated first frequency or first frequency error, wherein the joint demodulator is responsive to the first long-term automatic frequency control. A second long-term automatic frequency control is responsive to the estimated second frequency or second frequency error, wherein the joint demodulator is responsive to the second long-term automatic frequency control. First and second local automatic frequency controls also may be included in the joint demodulator, wherein the first long-term automatic frequency control is responsive to the first local automatic frequency control and the second-long-term automatic frequency control is responsive to the second local automatic frequency control. The first long-term automatic frequency control and the second long-term automatic frequency control can produce respective first and second frequency offset signals that are applied to the joint demodulator. Alternatively, a difference between the first and second frequency offsets is applied to the joint demodulator and the first frequency offset is applied to a downconverter that downconverts the jointly received first and second signals and provides the downconverted signals to the joint demodulator.
摘要翻译：联合解调器被配置为产生用于第一信号的估计的第一频率或第一频率误差以及用于第二信号的估计的第二频率或第二频率误差。第一长期自动频率控制响应于估计的第一频率或第一频率误差，其中联合解调器响应于第一长期自动频率控制。第二长期自动频率控制响应于估计的第二频率或第二频率误差，其中联合解调器响应于第二长期自动频率控制。第一和第二局部自动频率控制也可以包括在联合解调器中，其中第一长期自动频率控制响应于第一局部自动频率控制，而第二长期自动频率控制响应于第二局部自动频率控制自动频率控制。第一长期自动频率控制和第二长期自动频率控制可以产生施加到联合解调器的相应的第一和第二频偏信号。或者，将第一和第二频率偏移之间的差施加到联合解调器，并且第一频率偏移被施加到下变频器，其下变频共同接收的第一和第二信号，并将下变频信号提供给联合解调器。

4. 发明申请

WO2004014031A1 APPARATUS AND METHODS FOR SUPPRESSION OF INTERFERENCE 审中-公开
标题翻译：用于抑制干扰的装置和方法
公开(公告)号：WO2004014031A1
公开(公告)日：2004-02-12
申请号：PCT/US2003/021451
申请日：2003-07-09
申请人： ERICSSON INC. , ARSLAN, Huseyin , RAMESH, Rajaram
发明人： ARSLAN, Huseyin , RAMESH, Rajaram
IPC分类号： H04L25/03
CPC分类号： H04B1/123 , H04L25/03178 , H04L27/0012
摘要： Information is recovered from a composite signal including first and second component signals modulated according to respective first and second modulations, for example, 8-PSK and GMSK. The composite signal is processed based on predetermined characteristics of the first and second modulations, for example, signal rotations, to generate a channel model for the first component signal and a whitening filter for the second component signal. The composite signal is filtered according to the whitening filter to generate a filtered signal. A symbol hypothesis for a symbol of the first component signal is evaluated using a metric with respect to the filtered signal that is a function of the whitening filter and the channel model, for example, in a multidimensional Viterbi symbol estimation algorithm. The invention may be embodied as methods, apparatus and computer program products.
摘要翻译：从包括根据相应的第一和第二调制调制的第一和第二分量信号的复合信号恢复信息，例如8-PSK和GMSK。基于第一和第二调制的预定特性（例如，信号旋转）来处理复合信号，以产生用于第一分量信号的信道模型和用于第二分量信号的白化滤波器。根据白化滤波器对复合信号进行滤波以产生滤波信号。使用关于作为白化滤波器和信道模型的函数的滤波信号的度量来评估第一分量信号的符号的符号假设，例如，在多维维特比符号估计算法中。本发明可以体现为方法，装置和计算机程序产品。

5. 发明申请

WO2002023787A3 METHOD AND APPARATUS FOR SOFT INFORMATION GENERATION IN JOINT DEMODULATION OF CO-CHANNEL SIGNALS 审中-公开
公开(公告)号：WO2002023787A3
公开(公告)日：2002-03-21
申请号：PCT/US2001/023922
申请日：2001-09-10
申请人： ERICSSON, INC. , ARSLAN, Huseyin , MOLNAR, Karl, James
发明人： ARSLAN, Huseyin , MOLNAR, Karl, James
IPC分类号： H04L25/03
摘要： A method and apparatus generated soft values from a co-channel differentially encoded received signals. The soft values are generated by determining jointly detected symbols and corresponding joint metrics. A first potential nondetected metric sum is determined by flipping the current desired coherent detected symbol and keeping the interfered coherent detected symbol as is. A second potential nondetected metric sum is determined by flipping the previous desired coherent detected symbol and keeping the interfered coherent detected symbol as is. A minimum between the difference of the detected jont metrics and the two nondetected joint metrics is found. The soft values are then established based on the minimum difference metric.

6. 发明申请

WO2005050937A1 METHODS AND APPARATUS FOR PRE-FILTERING A SIGNAL TO INCREASE SIGNAL-TO-NOISE RATIO AND DECORRELATE NOISE 审中-公开
标题翻译：用于预先过滤信号以增加信号噪声和装饰噪声的方法和装置
公开(公告)号：WO2005050937A1
公开(公告)日：2005-06-02
申请号：PCT/US2004/038412
申请日：2004-11-16
申请人： TELEFONAKTIEBOLAGET L.M. ERICSSON (PUBL) , HAFEEZ, Abdulrauf , ARSLAN, Huseyin , HUI, Dennis , RAMESH, Rajaram
发明人： HAFEEZ, Abdulrauf , ARSLAN, Huseyin , HUI, Dennis , RAMESH, Rajaram
IPC分类号： H04L25/03
CPC分类号： H04L25/03133 , H04L2025/03605
摘要： To receive a signal from a multiple-input-multiple-output (MIMO) communication channel, initial channel taps are generated based on an impulse response estimate of the MIMO communication channel. The received signal is pre-filtered (350) using the initial channel taps to generate output channel taps and a corresponding output signal having an increased signal-to-noise ratio (SNR) and uncorrelated noise. The SNR is based on a ratio of the energy in a first subset of the output channel taps to the energy in a second subset of the output channel taps.
摘要翻译：为了从多输入多输出（MIMO）通信信道接收信号，基于MIMO通信信道的脉冲响应估计来生成初始信道抽头。使用初始信道抽头对接收到的信号进行预滤波（350），以产生输出信道抽头和具有增加的信噪比（SNR）和不相关噪声的相应输出信号。 SNR基于输出信道抽头的第一子集中的能量与输出信道抽头的第二子集中的能量的比率。

7. 发明申请

WO2003073630A1 SIGNAL RECEIVER DEVICES AND METHODS 审中-公开
标题翻译：信号接收设备和方法
公开(公告)号：WO2003073630A1
公开(公告)日：2003-09-04
申请号：PCT/SE2002/001050
申请日：2002-05-31
申请人： TELEFONAKTIEBOLAGET LM ERICSSON , OLSSON, Magnus , ARSLAN, Huseyin
发明人： OLSSON, Magnus , ARSLAN, Huseyin
IPC分类号： H04B1/10
CPC分类号： H04L1/0021 , H04B1/1027 , H04L1/0003 , H04L1/20 , H04L25/03993
摘要： In the present disclosure, a method/apparatus is provided that detects the impairment in the received signal (12) and employs the structure in the receiver (10) that is designed for that purpose. Preferably, the method/apparatus detects the interferer modulation and employs the structure in the receiver (10) that is designed for that purpose. The detection is preferably performed using a quality measure (16), e.g., the residual errors after channel estimation or SNR (signa-to-noise-ratio) estimates after channel estimation. The present invention involves preferably hypothesis tests, threshold schemes, or schemes where the threshold is adapted according to one of the measures. The operations in the receiver is preferably that is selects between a powerful interference rejection method and a conventional receiver or that is selects between a powerful interference rejection method and a less powerful interference rejection method, or a combination thereof.
摘要翻译：在本公开中，提供了一种检测接收信号（12）中的损害并采用为此目的设计的接收器（10）中的结构的方法/装置。优选地，该方法/装置检测干扰源调制，并采用为此设计的接收机（10）中的结构。优选地，使用质量测量（16）来执行检测，例如在信道估计之后的信道估计之后的残差或信道估计后的SNR（信噪比）估计。本发明优选地涉及假设测试，阈值方案或其中阈值根据其中一个度量来适应的方案。接收机中的操作优选地是在强大的干扰抑制方法和常规接收机之间进行选择，或者在强大的干扰抑制方法和较不强大的干扰抑制方法或其组合之间进行选择。

8. 发明申请

WO2010102126A1 A METHOD FOR ITERATIVE INTERFERENCE CANCELLATION FOR CO-CHANNEL MULTI-CARRIER AND NARROWBAND SYSTEMS 审中-公开
标题翻译：用于共通道多载波和窄带系统的迭代干扰消除的方法
公开(公告)号：WO2010102126A1
公开(公告)日：2010-09-10
申请号：PCT/US2010/026238
申请日：2010-03-04
申请人： NTT DOCOMO, INC. , SAHIN, Mustafa E. , GUVENC, Ismail , ARSLAN, Huseyin
发明人： SAHIN, Mustafa E. , GUVENC, Ismail , ARSLAN, Huseyin
IPC分类号： H04B1/10
CPC分类号： H04L27/2647 , H04J11/004 , H04J11/0066 , H04L5/0007 , H04L25/0204 , H04L25/0212 , H04L25/0224 , H04L25/03821
摘要： In a co-channel deployment of narrowband and multi-carrier technologies (e.g., a femtocell and a macrocell), a method provides cancelling of interference which treats the co-channel signals as desired signals and enhances each of them iteratively. At each iteration, each signal is demodulated and regenerated based on symbol decisions already made and a predetermined channel impulse response. To estimate the other (interfering) co-channel signal, the regenerated signal is subtracted from the aggregate signal. Simulations have shown that a method of the present invention can provide fundamental improvement in the performances of both interfering systems in as few as two iterations. The fundamental performance gain that can be obtained outweigh the required computational burden.
摘要翻译：在窄带和多载波技术（例如，毫微微小区和宏小区）的协同信道部署中，一种方法提供了将对等信道信号作为所需信号的干扰的取消，并且迭代地增强了每个信道。在每次迭代中，基于已经做出的符号决定和预定的信道脉冲响应来解调和再生每个信号。为了估计另一个（干扰）同信道信号，从聚合信号中减去再生信号。模拟已经表明，本发明的方法可以在两次迭代中提供两个干扰系统的性能的基本改进。可以获得的基本性能增益超过所需的计算负担。

9. 发明申请

WO2009111392A2 OFDMA-BASED CO-CHANNEL FEMTOCELL 审中-公开
标题翻译：基于OFDMA的CO信道FEMTOCELL
公开(公告)号：WO2009111392A2
公开(公告)日：2009-09-11
申请号：PCT/US2009/035716
申请日：2009-03-02
申请人： NTT DOCOMO, INC. , SAHIN, Mustafa Emin , ARSLAN, Huseyin , GUVENC, Ismail , JEONG, Moo Ryong
发明人： SAHIN, Mustafa Emin , ARSLAN, Huseyin , GUVENC, Ismail , JEONG, Moo Ryong
IPC分类号： H04W72/00
CPC分类号： H04W72/082 , H04L5/0007 , H04L5/0033 , H04L5/0037 , H04L5/0044 , H04L5/0062 , H04L5/0092 , H04W16/32 , H04W72/0426 , H04W84/045
摘要： A femtocell increases efficiency and coverage of a macrocellular network operating in a co-channel manner within the macrocell spectrum by selecting subcarriers for its mobile station using both the subcarrier allocation map received from the macrocell and a spectrum sensing operation. Interference is avoided by selecting only subcarriers not allocated by the macrocell and subcarriers allocated to users not nearby to the femtocell. Interference is eliminated from the received signals using co-channel interference avoidance techniques. Selection of subcarriers for femtocell use may take into consideration inter-carrier interference detected.
摘要翻译：毫微微小区通过使用从宏小区接收的副载波分配图和频谱感测操作来选择用于其移动台的子载波来增加在宏小区频谱内以同信道方式工作的宏蜂窝网络的效率和覆盖。通过仅选择未由宏小区分配的子载波和分配给不在毫微微小区附近的用户的子载波来避免干扰。使用同信道干扰避免技术从接收到的信号中消除干扰。毫微微小区使用的子载波的选择可以考虑检测到的载波间干扰。

10. 发明申请

WO2006029208A1 COVERT OFDM TRANSMISSION USING CYCLIC PREFIX 审中-公开
标题翻译：使用循环前缀的覆盖OFDM传输
公开(公告)号：WO2006029208A1
公开(公告)日：2006-03-16
申请号：PCT/US2005/031869
申请日：2005-09-06
申请人： UNIVERSITY OF SOUTH FLORIDA , YUCEK, Tevfik , ARSLAN, Huseyin
发明人： YUCEK, Tevfik , ARSLAN, Huseyin
IPC分类号： H04J11/00
CPC分类号： H04L27/2607 , H04J11/0063 , H04J13/0003 , H04K1/10 , H04L5/0007 , H04L5/0048 , H04L25/03866 , H04L27/2605 , H04L27/2613 , H04L27/2655
摘要： Methods for secure OFDM communications include changing the length of OFDM symbols in a pseudo-random fashion by appending a totally random signal to some of the OFDM symbols. An adaptive cyclic prefix is provided for covert and spectrally efficient communication. A developed PN based random data addition provides further security by removing the chance of combining synchronization information over several OFDM symbols.
摘要翻译：用于安全OFDM通信的方法包括通过将全随机信号附加到一些OFDM符号来以伪随机方式改变OFDM符号的长度。为隐蔽和频谱有效的通信提供了自适应循环前缀。开发的基于PN的随机数据附加通过消除在几个OFDM符号上组合同步信息的机会来提供进一步的安全性。

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