公开(公告)号：US20090190682A1

公开(公告)日：2009-07-30

申请号：US11571366

申请日：2005-06-27

申请人： Xuemei Ouyang ,  Pen Li ,  Monisha Ghosh

发明人： Xuemei Ouyang ,  Pen Li ,  Monisha Ghosh

IPC分类号： H04L23/02 ,  H04K1/10

CPC分类号： H04L1/06 ,  H04L25/03197

摘要： A system and method for a simplified Maximum Likelihood (ML) decoding (203) for MIMO systems is provided. The full ML decoding gives the lower bound of the decoding for CC coded MIMO systems. However, the computation cost is too high to be implemented in real system. Many alternative methods have been proposed for the decoding. Among them, weighted Zero Forcing (WZF) is one that can give affordable performance with reasonable computation complexity but there are several dB of performance gap for the WZF decoding and ML decoding. This present invention discloses a decoding system and method having improved performance over WZF decoding with affordable implementation complexity.

摘要翻译： 提供了一种用于MIMO系统的简化最大似然（ML）解码（203）的系统和方法。 完整的ML解码为CC编码的MIMO系统提供了解码的下限。 然而，计算成本太高，无法在实际系统中实现。 已经提出了用于解码的许多替代方法。 其中，加权零强制（WZF）是能够以合理的计算复杂度提供负担得起的性能，但对于WZF解码和ML解码，存在几dB的性能差距。 本发明公开了一种具有可靠实现复杂度的WZF解码性能提高的解码系统和方法。

公开(公告)号：US07724834B2

公开(公告)日：2010-05-25

申请号：US11571366

申请日：2005-06-27

申请人： Xuemei Ouyang ,  Pen Li ,  Monisha Ghosh

发明人： Xuemei Ouyang ,  Pen Li ,  Monisha Ghosh

IPC分类号： H04L5/12

CPC分类号： H04L1/06 ,  H04L25/03197

摘要： A system and method for a simplified Maximum Likelihood (ML) decoding (203) for MIMO systems is provided. The full ML decoding gives the lower bound of the decoding for CC coded MIMO systems. However, the computation cost is too high to be implemented in real system. Many alternative methods have been proposed for the decoding. Among them, weighted Zero Forcing (WZF) is one that can give affordable performance with reasonable computation complexity but there are several dB of performance gap for the WZF decoding and ML decoding. This present invention discloses a decoding system and method having improved performance over WZF decoding with affordable implementation complexity.

摘要翻译： 提供了一种用于MIMO系统的简化最大似然（ML）解码（203）的系统和方法。 完整的ML解码为CC编码的MIMO系统提供了解码的下限。 然而，计算成本太高，无法在实际系统中实现。 已经提出了用于解码的许多替代方法。 其中，加权零强制（WZF）是能够以合理的计算复杂度提供负担得起的性能，但对于WZF解码和ML解码，存在几dB的性能差距。 本发明公开了一种具有可靠实现复杂度的WZF解码性能提高的解码系统和方法。

公开(公告)号：US20090074091A1

公开(公告)日：2009-03-19

申请号：US11916513

申请日：2006-06-23

申请人： Monisha Ghosh ,  Pen Li

发明人： Monisha Ghosh ,  Pen Li

IPC分类号： H04L27/28

CPC分类号： H04L1/04 ,  H04L1/0071 ,  H04L1/0625 ,  H04L1/0668 ,  H04L27/2626

摘要： The present invention, generally speaking, provides interleavers and methods of interleaving that satisfy the need for backward compatibility while effectively addressing competing design objectives. In accordance with one aspect of the invention, data is transmitted using a number of transmit antennas greater than an expected number of receive antennas. At least one pair of transmit antennas is formed, and multiple second data streams are formed from a first data stream, successive bits in said first data stream being assigned to different ones of said second data streams. Block interleaving of multiple respective ones of said second data streams is individually performed. During successive transmission intervals, the pair of transmit antennas is used to transmit a pair of data symbols taken from different ones of said second data streams, followed by an equivalent transformed pair of data symbols.

摘要翻译： 本发明一般地提供交织器和交织方法，其满足对向兼容性的需要，同时有效地解决竞争设计目标。 根据本发明的一个方面，使用大于预期数量的接收天线的多个发射天线来发送数据。 形成至少一对发射天线，并且从第一数据流形成多个第二数据流，所述第一数据流中的连续位被分配给不同的所述第二数据流。 分别执行多个相应的所述第二数据流的块交织。 在连续的传输间隔期间，该对发射天线用于发送从不同的所述第二数据流中取出的一对数据符号，随后是等效的变换数据符号对。

公开(公告)号：US08050349B2

公开(公告)日：2011-11-01

申请号：US11913662

申请日：2006-05-03

申请人： Monisha Ghosh ,  Pen Li

发明人： Monisha Ghosh ,  Pen Li

IPC分类号： H04L1/02 ,  H04L27/28

CPC分类号： H04L1/0668 ,  H04L1/0071 ,  H04L1/0625 ,  H04L27/2602

摘要： The present invention, generally speaking, provides interleavers and methods of interleaving that satisfy the need for backward compatibility while effectively addressing competing design objectives. In accordance with one aspect of the invention, data is transmitted using a number of transmit antennas greater than an expected number of receive antennas. At least one pair of transmit antennas (ant′—1, ant′_N) is formed, and multiple second data streams (610a, 610u) are formed from a first data stream, successive bits in said first data stream being assigned to different ones of said second data streams. Block interleaving of multiple respective ones of said second data streams is individually performed (611a, 611u). During successive transmission intervals (617), the pair of transmit antennas is used to transmit a pair of data symbols taken from different ones of said second data streams, followed by an equivalent transformed pair of data symbols.

摘要翻译： 本发明一般地提供交织器和交织方法，其满足对向兼容性的需要，同时有效地解决竞争设计目标。 根据本发明的一个方面，使用大于预期数量的接收天线的多个发射天线来发送数据。 形成至少一对发射天线（ant'-1，ant'_N），并且从第一数据流形成多个第二数据流（610a，610u），所述第一数据流中的连续比特被分配给不同的 的所述第二数据流。 单独执行多个相应的所述第二数据流的块交织（611a，611u）。 在连续发送间隔（617）期间，使用一对发射天线来发送从不同的所述第二数据流中取出的一对数据符号，随后是等效的变换数据符号对。

公开(公告)号：US20090041137A1

公开(公告)日：2009-02-12

申请号：US11913662

申请日：2006-05-03

申请人： Monisha Ghosh ,  Pen Li

发明人： Monisha Ghosh ,  Pen Li

IPC分类号： H04J11/00 ,  H04L27/28

CPC分类号： H04L1/0668 ,  H04L1/0071 ,  H04L1/0625 ,  H04L27/2602

摘要： The present invention, generally speaking, provides interleavers and methods of interleaving that satisfy the need for backward compatibility while effectively addressing competing design objectives. In accordance with one aspect of the invention, data is transmitted using a number of transmit antennas greater than an expected number of receive antennas. At least one pair of transmit antennas (ant′_1, ant′_) is formed, and multiple second data streams (610a, 610u) are formed from a first data stream, successive bits in said first data stream being assigned to different ones of said second data streams. Block interleaving of multiple respective ones of said second data streams is individually performed (611a, 611u). During successive transmission intervals (617), the pair of transmit antennas is used to transmit a pair of data symbols taken from different ones of said second data streams, followed by an equivalent transformed pair of data symbols.

摘要翻译： 本发明一般地提供交织器和交织方法，其满足对向兼容性的需要，同时有效地解决竞争设计目标。 根据本发明的一个方面，使用大于预期数量的接收天线的多个发射天线来发送数据。 形成至少一对发射天线（ant'_1，ant'_），并且从第一数据流形成多个第二数据流（610a，610u），所述第一数据流中的连续比特被分配给 说第二个数据流。 单独执行多个相应的所述第二数据流的块交织（611a，611u）。 在连续发送间隔（617）期间，使用一对发射天线来发送从不同的所述第二数据流中取出的一对数据符号，随后是等效的变换数据符号对。

公开(公告)号：US20080049654A1

公开(公告)日：2008-02-28

申请号：US11569039

申请日：2005-05-12

申请人： Begonya Otal ,  Joerg Habetha ,  Francesc Dalmases ,  Pen Li ,  Monisha Ghosh ,  Parag Garg

发明人： Begonya Otal ,  Joerg Habetha ,  Francesc Dalmases ,  Pen Li ,  Monisha Ghosh ,  Parag Garg

IPC分类号： H04L12/28 ,  H04L29/06

CPC分类号： H04W28/06 ,  H04W48/08 ,  H04W52/0216 ,  H04W52/0219 ,  H04W64/00 ,  H04W84/12 ,  Y02D70/142

摘要： Method, frame definitions (300 400 500 700 800 1000 1200 1300 1400) and system for transmission of an aggregation of packets which includes a plurality of Medium Access Control (MAC) Protocol Data Units (MPDUs) or PLCP (Physical Layer Convergence Protocol) Protocol Data Units (PPDUs) intended for one or several receivers and transmitted at one or several different Physical (PHY) rates. In some aspects of the invention, a pre-amble, rsp. mid-amble (415.i 515.i 715.i 815.i 1015.i 1215.i 1315.i) is transmitted in-between each or between multiples of MPDUs or PPDUs allowing receiver devices to go into sleep mode and wake-up during the aggregate or packet burst. Furthermore, information is transmitted at the beginning of the aggregate/packet burst, which allows devices to deduce the position of MPDUs/PPDUs or multiples of MPDUs/PPDUs in the aggregate. MPDUs or PPDUs are grouped in order to enable efficient sleep times of the receiving devices. The receiving devices decode the information at the beginning of the aggregate/burst, fall into sleep-mode and wake up shortly before their packets have to be received.

摘要翻译： 方法，帧定义（300 400 500 700 800 1000 1200 1300 1400）以及用于传输分组聚合的系统，包括多个介质访问控制（MAC）协议数据单元（MPDU）或PLCP（物理层会聚协议）协议 数据单元（PPDU），用于一个或多个接收器，并以一个或多个不同的物理（PHY）速率传输。 在本发明的一些方面，一种前缀，rsp。 中间码（415. i 515. i 715. i 815. i 1015. i 1215. i 1315. i）在MPDU或PPDU之间的每个或多个之间传输，允许接收机设备进入睡眠模式， 在聚合或分组突发期间。 此外，在聚合/分组突发的开始处发送信息，这允许设备在聚合中推断出MPDU / PPDU的位置或MPDU / PPDU的倍数。 MPDU或PPDU被分组以便实现接收设备的有效睡眠时间。 接收设备在聚合/突发的开始处对信息进行解码，在分组必须被接收之前不久就会进入休眠模式并唤醒。

公开(公告)号：US07949067B2

公开(公告)日：2011-05-24

申请号：US11916513

申请日：2006-06-23

申请人： Monisha Ghosh ,  Pen Li

发明人： Monisha Ghosh ,  Pen Li

IPC分类号： H04L27/00

CPC分类号： H04L1/04 ,  H04L1/0071 ,  H04L1/0625 ,  H04L1/0668 ,  H04L27/2626

摘要： The present invention, generally speaking, provides interleavers and methods of interleaving that satisfy the need for backward compatibility while effectively addressing competing design objectives. In accordance with one aspect of the invention, data is transmitted using a number of transmit antennas greater than an expected number of receive antennas. At least one pair of transmit antennas is formed (ant1, ant_N), and multiple second data streams (311, 312) are formed from a first data stream, successive bits in said first data stream being assigned to different ones of said second data streams. Block interleaving (313, 314) of multiple respective ones of said second data streams is individually performed. During successive transmission intervals, the pair of transmit antennas is used to transmit a pair of data symbols taken from different ones of said second data streams, followed by an equivalent transformed pair of data symbols.

摘要翻译： 本发明一般地提供交织器和交织方法，其满足对向兼容性的需要，同时有效地解决竞争设计目标。 根据本发明的一个方面，使用大于预期数量的接收天线的多个发射天线来发送数据。 形成至少一对发射天线（ant1，ant_N），并且从第一数据流形成多个第二数据流（311,312），所述第一数据流中的连续比特被分配给不同的所述第二数据流 。 分别执行多个相应的所述第二数据流的块交织（313,314）。 在连续的传输间隔期间，该对发射天线用于发送从不同的所述第二数据流中取出的一对数据符号，随后是等效的变换数据符号对。

公开(公告)号：US08081693B2

公开(公告)日：2011-12-20

申请号：US12281417

申请日：2007-02-24

申请人： Pen Li

发明人： Pen Li

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2607

摘要： A system, apparatus and methods are described that select a guard interval length (345) for a multi-path communications channel. In one embodiment, the guard interval length is selected based on a relationship between a selected coherence bandwidth (335) and a RMS delay (340) of the communication channel.

摘要翻译： 描述了为多径通信信道选择保护间隔长度（345）的系统，装置和方法。 在一个实施例中，基于所选择的相干带宽（335）和通信信道的RMS延迟（340）之间的关系来选择保护间隔长度。

公开(公告)号：US07573910B2

公开(公告)日：2009-08-11

申请号：US10569128

申请日：2004-08-25

申请人： Pen Li

发明人： Pen Li

IPC分类号： H04J3/16

CPC分类号： H04W28/06 ,  H04L12/66 ,  H04W28/18 ,  H04W48/16 ,  H04W80/00 ,  H04W84/12

摘要： A wireless communication device includes an input/output terminal. A memory is configured to store parameters relevant to a wireless communication protocol. A modem is coupled to the input/output terminal and the memory and configured to operate a wireless protocol over a wireless channel with other modems based at least in part on the parameters stored in the memory. A logic circuit is coupled to the modem and the memory and configured to receive information related to wireless channel conditions and update at least one parameter in the memory. In one aspect of the invention, the wireless protocol is 802.11. Advantages of the invention include the ability to achieve higher wireless communication throughput due to the dynamic setting of the communication parameters, for example, the fragmentation threshold.

摘要翻译： 无线通信装置包括输入/​​输出端子。 存储器被配置为存储与无线通信协议相关的参数。 调制解调器耦合到输入/输出终端和存储器，并且被配置为至少部分地基于存储在存储器中的参数，通过无线信道与其他调制解调器操作无线协议。 逻辑电路耦合到调制解调器和存储器并且被配置为接收与无线信道条件相关的信息并更新存储器中的至少一个参数。 在本发明的一个方面，无线协议是802.11。 本发明的优点包括由于通信参数的动态设置（例如分段阈值）而实现更高无线通信吞吐量的能力。

公开(公告)号：US08364832B2

公开(公告)日：2013-01-29

申请号：US10569016

申请日：2004-08-26

申请人： Pen Li

发明人： Pen Li

IPC分类号： G06F15/16

CPC分类号： H04W28/06 ,  H04L1/0083 ,  H04L47/10 ,  H04L2001/0098 ,  H04W84/12

摘要： A wireless communication device comprises an input terminal configured to communicate data with a processor. A segregation circuit (150) is coupled to the input terminal and configured to identify predetermined data and to separate more important data from less important data. A memory (112) is configured to store at least one parameter relevant to the wireless communication protocol. A modem (110) is coupled to segregation circuit and the memory (112) and is configured to communicate using a wireless protocol over a wireless channel, and includes a framer (152) configured to fragment the segregated data based at least in part on the at least one parameter stored in the memory. In one aspect of the invention, the wireless protocol is 802.11. Advantages of the invention include the ability to achieve high quality video communication over a wireless communication link with less chance of dropping important data.

摘要翻译： 无线通信设备包括被配置为与处理器通信数据的输入终端。 隔离电路（150）耦合到输入端子并且被配置为识别预定数据并且将更重要的数据与不太重要的数据分离。 存储器（112）被配置为存储与无线通信协议相关的至少一个参数。 调制解调器（110）耦合到分离电路和存储器（112），并且被配置为通过无线信道使用无线协议进行通信，并且包括成帧器（152），其被配置为至少部分地基于所述分离数据 存储在存储器中的至少一个参数。 在本发明的一个方面，无线协议是802.11。 本发明的优点包括通过无线通信链路实现高质量视频通信的能力，其中丢弃重要数据的可能性较小。