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21. 发明申请

US20090049358A1 Methods and systems for terminating an iterative decoding process of a forward error correction block 有权
标题翻译：用于终止前向纠错块的迭代解码过程的方法和系统
公开(公告)号：US20090049358A1
公开(公告)日：2009-02-19
申请号：US11893329
申请日：2007-08-15
申请人： Louay Jalloul , Sriram Mudulodu
发明人： Louay Jalloul , Sriram Mudulodu
IPC分类号： H03M13/05
CPC分类号： H03M13/2975
摘要： The invention provides methods and systems for terminating an iterative decoding process of a Forward Error Correction block (FEC). The iterative decoding process of the FEC block is terminated upon determining that the FEC block cannot be decoded successfully. A method comprises calculating a metric based on one or more Log Likelihood Ratios (LLRs) corresponding to a first number of iterations of the iterative decoding process of the FEC block. The method further comprises, formulating one or more stopping criteria for the iterative decoding process based on a variation pattern of the metric over a second predetermined number of iterations of the iterative decoding process. The second predetermined number of iterations is a subset of the first number of iterations. Moreover, the method comprises terminating the iterative decoding process of the FEC block based on the one or more stopping criteria.
摘要翻译：本发明提供了用于终止前向纠错块（FEC）的迭代解码过程的方法和系统。在确定FEC块不能被成功解码的情况下，终止FEC块的迭代解码处理。一种方法包括基于与FEC块的迭代解码处理的第一迭代次数相对应的一个或多个对数似然比（LLR）来计算度量。该方法还包括：基于迭代解码过程的第二预定迭代次数的度量的变化模式，为迭代解码过程制定一个或多个停止标准。第二预定次数的迭代是第一次迭代次数的子集。此外，该方法包括基于一个或多个停止标准终止FEC块的迭代解码处理。

22. 发明授权

US08654695B2 Link adaptation of a broadcast system 有权
标题翻译：链接适应广播系统
公开(公告)号：US08654695B2
公开(公告)日：2014-02-18
申请号：US12002208
申请日：2007-12-14
申请人： Louay Jalloul , Sriram Mudulodu , Djordje Tujkovic , Kamesh Medepalli
发明人： Louay Jalloul , Sriram Mudulodu , Djordje Tujkovic , Kamesh Medepalli
IPC分类号： H04H20/71
CPC分类号： H04L1/0019 , H04L1/0003 , H04L1/0026 , H04L1/0027 , H04L2001/0093
摘要： A method and apparatus of link adaptation of a broadcast system is disclosed. The method includes a base station adaptively determining a signal quality threshold. The base station broadcasts a signal, wherein the signal includes the signal quality threshold. A plurality of subscribers receives the signal, and measure a signal quality. Each of a subset of the plurality of subscribers transmits back to the base station an indicator of whether the received signal has a measured signal quality that is either above or below the signal quality threshold. A percentage of subscribers that receive the signal having a received signal quality above the signal quality threshold is estimated. A transmission modulation format and coding is selected based on the estimated percentage.
摘要翻译：公开了广播系统的链路自适应的方法和装置。该方法包括基站自适应地确定信号质量阈值。基站广播信号，其中信号包括信号质量阈值。多个用户接收信号，并测量信号质量。多个用户的子集中的每一个向基站发送接收信号是否具有高于或低于信号质量阈值的测量信号质量的指示符。估计接收信号质量高于信号质量阈值的信号的用户的百分比。基于估计的百分比来选择传输调制格式和编码。

23. 发明授权

US08437415B2 Estimating frequency offset at a subscriber station receiver 有权
公开(公告)号：US08437415B2
公开(公告)日：2013-05-07
申请号：US12900094
申请日：2010-10-07
申请人： Sriram Mudulodu , Louay Jalloul
发明人： Sriram Mudulodu , Louay Jalloul
IPC分类号： H04L27/28
CPC分类号： H04L27/2657 , H04L5/0007 , H04L5/005 , H04L27/2675
摘要： A method and system of estimating frequency offset at a subscriber station is disclosed. The method includes the subscriber station receiving a composite signal, in which the composite signal includes multi-carrier signals transmitted from a plurality of base stations. The subscriber station selects a subset of the plurality of base stations. The subscriber station selects at least one pair of multi-carrier symbols of the composite signal, wherein each of the at least one pair of multi-carrier symbols include a plurality of pilot sub-carriers. The subscriber station selects a subset of the plurality of pilot sub-carriers of the at least one pair of multi-carrier symbols based on transmit pilot symbols of the pilot sub-carriers of the multi-carrier signals transmitted by the subset of the plurality of base stations. The frequency offset is estimated based on a conjugate product between received symbols across at least one pair of multi-carrier symbols of each of the pilot sub-carriers of the selected subset of the plurality of pilot sub-carriers.

24. 发明授权

US08160188B2 Method and system for communication in a wireless orthogonal frequency division multiplexing (OFDM) communication system 有权
标题翻译：无线正交频分复用（OFDM）通信系统中的通信方法和系统
公开(公告)号：US08160188B2
公开(公告)日：2012-04-17
申请号：US12317162
申请日：2008-12-18
申请人： Sriram Mudulodu , Louay Jalloul
发明人： Sriram Mudulodu , Louay Jalloul
IPC分类号： H04B7/10
CPC分类号： H04L27/2626 , H04L5/0023 , H04L27/2647
摘要： Method and system for wireless communication in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is disclosed. The method involves receiving a plurality of receive-signals over a first set of antennas. Further, one or more of the plurality of receive-signals are cyclically delayed to generate one or more cyclically delayed receive-signal. Subsequently, one or more of the plurality of receive-signals are combined with one or more of the cyclically delayed receive-signals. In other words, the method involves performing receive Cyclic Delay Diversity (CDD).
摘要翻译：公开了正交频分复用（OFDM）通信系统中无线通信的方法和系统。该方法涉及通过第一组天线接收多个接收信号。此外，多个接收信号中的一个或多个被循环地延迟以产生一个或多个循环延迟的接收信号。随后，多个接收信号中的一个或多个与一个或多个循环延迟的接收信号组合。换句话说，该方法涉及执行接收循环延迟分集（CDD）。

25. 发明申请

US20110019778A1 Estimating Frequency Offset at a Subscriber Station Receiver 有权
标题翻译：用户站接收机估计频偏
公开(公告)号：US20110019778A1
公开(公告)日：2011-01-27
申请号：US12900094
申请日：2010-10-07
申请人： Sriram Mudulodu , Louay Jalloul
发明人： Sriram Mudulodu , Louay Jalloul
IPC分类号： H04L27/06
CPC分类号： H04L27/2657 , H04L5/0007 , H04L5/005 , H04L27/2675
摘要： A method and system of estimating frequency offset at a subscriber station is disclosed. The method includes the subscriber station receiving a composite signal, in which the composite signal includes multi-carrier signals transmitted from a plurality of base stations. The subscriber station selects a subset of the plurality of base stations. The subscriber station selects at least one pair of multi-carrier symbols of the composite signal, wherein each of the at least one pair of multi-carrier symbols include a plurality of pilot sub-carriers. The subscriber station selects a subset of the plurality of pilot sub-carriers of the at least one pair of multi-carrier symbols based on transmit pilot symbols of the pilot sub-carriers of the multi-carrier signals transmitted by the subset of the plurality of base stations. The frequency offset is estimated based on a conjugate product between received symbols across at least one pair of multi-carrier symbols of each of the pilot sub-carriers of the selected subset of the plurality of pilot sub-carriers.
摘要翻译：公开了一种估计用户台频偏的方法和系统。该方法包括用户站接收复合信号，其中复合信号包括从多个基站发送的多载波信号。用户站选择多个基站的子集。用户站选择复合信号的至少一对多载波符号，其中至少一对多载波符号中的每一个包括多个导频子载波。用户站基于由多个子载波子集的子集发送的多载波信号的导频子载波的发射导频符号来选择至少一对多载波码元的多个导频子载波的子集基站基于多个导频子载波的所选子集的每个导频子载波的至少一对多载波符号之间的接收符号之间的共轭乘积来估计频率偏移。

26. 发明授权

US07813437B2 Estimating frequency offset at a subscriber station receiver 有权
标题翻译：估计用户台接收机的频偏
公开(公告)号：US07813437B2
公开(公告)日：2010-10-12
申请号：US11900799
申请日：2007-09-13
申请人： Sriram Mudulodu , Louay Jalloul
发明人： Sriram Mudulodu , Louay Jalloul
IPC分类号： H04L27/28
CPC分类号： H04L27/2657 , H04L5/0007 , H04L5/005 , H04L27/2675
摘要： A method and system of estimating frequency offset at a subscriber station is disclosed. The method includes the subscriber station receiving a composite signal, in which the composite signal includes multi-carrier signals transmitted from a plurality of base stations. The subscriber station selects a subset of the plurality of base stations. The subscriber station selects at least one pair of multi-carrier symbols of the composite signal, wherein each of the at least one pair of multi-carrier symbols include a plurality of pilot sub-carriers. The subscriber station selects a subset of the plurality of pilot sub-carriers of the at least one pair of multi-carrier symbols based on transmit pilot symbols of the pilot sub-carriers of the multi-carrier signals transmitted by the subset of the plurality of base stations. The frequency offset is estimated based on a conjugate product between received symbols across at least one pair of multi-carrier symbols of each of the pilot sub-carriers of the selected subset of the plurality of pilot sub-carriers.
摘要翻译：公开了一种估计用户台频偏的方法和系统。该方法包括用户站接收复合信号，其中复合信号包括从多个基站发送的多载波信号。用户站选择多个基站的子集。用户站选择复合信号的至少一对多载波符号，其中至少一对多载波符号中的每一个包括多个导频子载波。用户站基于由多个子载波子集的子集发送的多载波信号的导频子载波的发射导频符号来选择至少一对多载波码元的多个导频子载波的子集基站基于多个导频子载波的所选子集的每个导频子载波的至少一对多载波符号之间的接收符号之间的共轭乘积来估计频率偏移。

27. 发明申请

US20090034558A1 Method and system for detecting a presence and a start of a zone in a frame 失效
标题翻译：用于检测帧中的区域的存在和开始的方法和系统
公开(公告)号：US20090034558A1
公开(公告)日：2009-02-05
申请号：US11888256
申请日：2007-07-31
申请人： Sriram Mudulodu , Louay Jalloul
发明人： Sriram Mudulodu , Louay Jalloul
IPC分类号： H04J3/06
CPC分类号： H04L27/2656 , H04L5/0007 , H04L5/0048 , H04L5/0092 , H04L25/0224 , H04L27/261 , H04L27/2662 , H04L27/2675 , H04W52/0216 , H04W52/0219 , Y02D70/146
摘要： The present invention provides methods and systems for detecting a start symbol of a second zone of a frame. One or more symbol indices corresponding to one or more symbols of the second zone of a frame are derived. One or more codes on pilot sub-carriers corresponding to the one or more symbol indices may also be derived. Based on the one or more symbol indices a set of possible start symbol indices is established. Thereafter, a frame is received comprising one or more of a preamble symbol, a first zone and the second zone. It is determined if the received frame comprises the second zone. If the second zone is present in the received frame, the start symbol index of the second zone of the received frame is determined based on the detection of one or more codes and the set of possible start symbol indices. The present invention further provides methods and systems for detecting a Nth symbol of a frame.
摘要翻译：本发明提供了用于检测帧的第二区的起始符号的方法和系统。导出与帧的第二区域的一个或多个符号相对应的一个或多个符号索引。也可以导出对应于一个或多个符号索引的导频子载波上的一个或多个码。基于一个或多个符号索引，建立一组可能的起始符号索引。此后，接收包括前导符号，第一区和第二区中的一个或多个的帧。确定接收帧是否包括第二区。如果接收到的帧中存在第二区域，则基于检测到一个或多个代码和可能的起始符号索引的集合来确定接收帧的第二区域的起始符号索引。本发明还提供了用于检测帧的第N个符号的方法和系统。

28. 发明申请

US20120201281A1 Method and System For Communication In A Wireless Orthogonal Frequency Division Multiplexing (OFDM) Communication System 有权
标题翻译：无线正交频分复用（OFDM）通信系统中的通信方法与系统
公开(公告)号：US20120201281A1
公开(公告)日：2012-08-09
申请号：US13448275
申请日：2012-04-16
申请人： Sriram MUDULODU , Louay Jalloul
发明人： Sriram MUDULODU , Louay Jalloul
IPC分类号： H04B1/38
CPC分类号： H04L27/2626 , H04L5/0023 , H04L27/2647
摘要： Method and system for wireless communication in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is disclosed. The method involves receiving a plurality of receive-signals over a first set of antennas. Further, one or more of the plurality of receive-signals are cyclically delayed to generate one or more cyclically delayed receive-signal. Subsequently, one or more of the plurality of receive-signals are combined with one or more of the cyclically delayed receive-signals. In other words, the method involves performing receive. Cyclic Delay Diversity (CDD).
摘要翻译：公开了正交频分复用（OFDM）通信系统中无线通信的方法和系统。该方法涉及通过第一组天线接收多个接收信号。此外，多个接收信号中的一个或多个被循环地延迟以产生一个或多个循环延迟的接收信号。随后，多个接收信号中的一个或多个与一个或多个循环延迟的接收信号组合。换句话说，该方法涉及执行接收。循环延迟多样性（CDD）。

29. 发明授权

US08086928B2 Methods and systems for terminating an iterative decoding process of a forward error correction block 有权
标题翻译：用于终止前向纠错块的迭代解码过程的方法和系统
公开(公告)号：US08086928B2
公开(公告)日：2011-12-27
申请号：US11893329
申请日：2007-08-15
申请人： Louay Jalloul , Sriram Mudulodu
发明人： Louay Jalloul , Sriram Mudulodu
IPC分类号： H03M13/00
CPC分类号： H03M13/2975
摘要： The invention provides methods and systems for terminating an iterative decoding process of a Forward Error Correction block (FEC). The iterative decoding process of the FEC block is terminated upon determining that the FEC block cannot be decoded successfully. A method comprises calculating a metric based on one or more Log Likelihood Ratios (LLRs) corresponding to a first number of iterations of the iterative decoding process of the FEC block. The method further comprises, formulating one or more stopping criteria for the iterative decoding process based on a variation pattern of the metric over a second predetermined number of iterations of the iterative decoding process. The second predetermined number of iterations is a subset of the first number of iterations. Moreover, the method comprises terminating the iterative decoding process of the FEC block based on the one or more stopping criteria.
摘要翻译：本发明提供了用于终止前向纠错块（FEC）的迭代解码过程的方法和系统。在确定FEC块不能被成功解码的情况下，终止FEC块的迭代解码处理。一种方法包括基于与FEC块的迭代解码处理的第一迭代次数相对应的一个或多个对数似然比（LLR）来计算度量。该方法还包括：基于迭代解码过程的第二预定迭代次数的度量的变化模式，为迭代解码过程制定一个或多个停止标准。第二预定次数的迭代是第一次迭代次数的子集。此外，该方法包括基于一个或多个停止标准终止FEC块的迭代解码处理。

30. 发明申请

US20090141832A1 Method for estimating frequency offset at a subscriber station receiver in a multi-carrier system 有权
标题翻译：用于在多载波系统中估计用户台接收机处的频率偏移的方法
公开(公告)号：US20090141832A1
公开(公告)日：2009-06-04
申请号：US11998541
申请日：2007-11-30
申请人： Sriram Mudulodu , Louay Jalloul , Bertrand Hochwald
发明人： Sriram Mudulodu , Louay Jalloul , Bertrand Hochwald
IPC分类号： H04L27/22
CPC分类号： H04L27/2657 , H04L27/2675 , H04L2027/0046
摘要： A method and system of estimating frequency offset of a subscriber station is disclosed. The method includes the subscriber station receiving a composite signal, wherein the composite signal includes multi-carrier signals transmitted from a plurality of base stations. The subscriber station selects a subset of the plurality of base stations. The subscriber station selects at least one pair of multi-carrier symbols of the composite signal, wherein each of the at least one pair of multi-carrier symbols includes a plurality of pilot sub-carriers. The subscriber station selects at least one group of the plurality of pilot sub-carriers within the at least one pair of multi-carrier symbols based on transmit pilot symbols of the pilot sub-carriers of the multi-carrier signals transmitted by the subset of the plurality of base stations. The frequency offset is estimated based on a conjugate product between a linear combination of received symbols of a first multi-carrier symbol of a pair of multi-carrier symbols with a linear combination of received symbols of a second multi-carrier symbol of the pair of multi-carrier symbols on each of the pilot sub-carriers of the at least one group of the plurality of pilot sub-carriers.
摘要翻译：公开了一种估计用户台频偏的方法和系统。该方法包括用户站接收复合信号，其中复合信号包括从多个基站发射的多载波信号。用户站选择多个基站的子集。用户站选择复合信号的至少一对多载波符号，其中至少一对多载波符号中的每一个包括多个导频子载波。用户台基于由子载波的子集发送的多载波信号的导频子载波的发送导频符号来选择至少一个多载波符号对内的多个导频子载波中的至少一个组多个基站。基于一对多载波符号的第一多载波符号的接收符号的线性组合与一对多载波符号的第二多载波符号的接收符号的线性组合，估计频偏所述多个导频子载波中的至少一个组的每个导频子载波上的多载波符号。

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