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21. 发明授权

US08705645B2 MIMO transmitter and method for transmitting OFDM symbols 有权
标题翻译： MIMO发射机和发射OFDM符号的方法
公开(公告)号：US08705645B2
公开(公告)日：2014-04-22
申请号：US13489595
申请日：2012-06-06
申请人： John S. Sadowsky , Minnie Ho , Sumeet Sandhu , Alexander A. Maltsev , Eric A. Jacobsen , Ali S. Sadri
发明人： John S. Sadowsky , Minnie Ho , Sumeet Sandhu , Alexander A. Maltsev , Eric A. Jacobsen , Ali S. Sadri
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04W16/28 , H04B7/0408 , H04L27/2602 , H04W74/02
摘要： An orthogonal-frequency division multiplexed (OFDM) transmitter is configured to transmit a data unit in accordance with a multiple-input multiple-output (MIMO) technique over a wideband channel comprising a 20 MHz channel and another channel using a plurality of spatially diverse antennas. The transmitter is further configured to include in the data unit, a parameter indicating a modulation and coding scheme and a parameter indicating number of spatial streams. Each of the spatial streams is encoded and beamformed for receipt by one or more different receiving stations.
摘要翻译：正交频分复用（OFDM）发射机被配置为根据多输入多输出（MIMO）技术在包括20MHz信道的宽带信道和使用多个空间多样的天线的另一信道上发送数据单元。发射机还被配置为在数据单元中包括指示调制和编码方案的参数以及指示空间流数量的参数。每个空间流被编码并且被波束形成以便由一个或多个不同的接收站接收。

22. 发明申请

US20120275539A1 OFDM TRANSMITTER WITH VARIABLE CODE BLOCK INTERLEAVER AND METHOD FOR OFDM COMMUNICATIONS WITH VARIABLE CODE BLOCK SIZES 审中-公开
标题翻译：具有可变码代码块的OFDM发射机和用于具有可变码区块的OFDM通信的方法
公开(公告)号：US20120275539A1
公开(公告)日：2012-11-01
申请号：US13544120
申请日：2012-07-09
申请人： Alexander A. Maltsev , Ali S. Sadri , Alexei V. Davydov
发明人： Alexander A. Maltsev , Ali S. Sadri , Alexei V. Davydov
IPC分类号： H04B7/06
CPC分类号： H04L1/0071 , H04L1/0042 , H04L27/2608 , H04L27/2628
摘要： A multi-antenna transmitter is configured for orthogonal frequency division multiplexed (OFDM) communications. The multi-antenna transmitter includes circuitry to receive an input bit sequence for code block segmentation including adding filler bits based on a selected code block size, a encoder to encode the bit sequence and an interleaver configurable to perform interleaving operations on blocks of bits of various code block sizes of the bit sequence. A controller is to select the code block size for the interleaver and OFDM transmitter circuitry to transmit OFDM symbols on subcarriers utilizing more than one antenna. The OFDM symbols are generated at least in part from the interleaved blocks.
摘要翻译：多天线发射机被配置用于正交频分复用（OFDM）通信。多天线发射机包括用于接收用于码块分段的输入比特序列的电路，包括基于选择的码块大小添加填充比特，对比特序列进行编码的编码器和可配置为对各种比特的块进行交织操作的交织器比特序列的码块大小。控制器是选择用于交织器和OFDM发射机电路的码块大小，以利用多于一个天线的子载波上的OFDM符号。至少部分地从交织块生成OFDM符号。

23. 发明授权

US08218674B2 OFDM transmitter with adaptive bit interleaver for adaptive bit loading and method for OFDM communications 有权
标题翻译：具有用于自适应比特加载的自适应比特交织器的OFDM发射机以及用于OFDM通信的方法
公开(公告)号：US08218674B2
公开(公告)日：2012-07-10
申请号：US12492466
申请日：2009-06-26
申请人： Alexander A. Maltsev , Ali S. Sadri , Alexei V. Davydov
发明人： Alexander A. Maltsev , Ali S. Sadri , Alexei V. Davydov
IPC分类号： H04L27/36
CPC分类号： H04L1/0071 , H04L1/0042 , H04L27/2608 , H04L27/2628
摘要： A multi-antenna transmitter includes an adaptive bit interleaver for orthogonal frequency division multiplexed (OFDM) communications. The adaptive bit interleaver permutes a variable number of coded bits per OFDM symbol (Ncbps). The variable number of coded bits is calculated based on individual subcarrier modulation assignments for orthogonal subcarriers. The interleaver matrix size may be based on the variable number of coded bits per OFDM symbol and the number of subchannels. The interleaver may add padding bits to the interleaver matrix to fill any remaining positions, and after performing an interleaving operation, the interleaver may prune the padding bits to provide a sequence of interleaved bits for subsequent modulation on the orthogonal subcarriers and transmission by more than one antenna. The transmitter may transmit the OFDM symbol in accordance with an IEEE 802.16 standard.
摘要翻译：多天线发射机包括用于正交频分复用（OFDM）通信的自适应比特交织器。自适应比特交织器将每个OFDM符号的可变数量的编码比特（Ncbps）置换。基于正交子载波的各个子载波调制分配来计算编码比特的可变数目。交织器矩阵大小可以基于每OFDM符号的可变数量的编码比特和子信道的数量。交织器可以向交织器矩阵添加填充比特以填充任何剩余的位置，并且在执行交织操作之后，交织器可以修剪填充比特以提供用于在正交子载波上进行后续调制的多个交织比特序列，并且多于一个天线。发射机可以根据IEEE 802.16标准发射OFDM符号。

24. 发明授权

US07899125B2 Method, device, and apparatus for multi-stream multi-band transmission 有权
标题翻译：用于多流多波段传输的方法，设备和装置
公开(公告)号：US07899125B2
公开(公告)日：2011-03-01
申请号：US11812283
申请日：2007-06-18
申请人： Alexander A. Maltsev , Alexey E. Rubtsov , Ali S. Sadri , Andrey V. Pudeyev , Sergey Tiraspolsky , Alexey Davydov
发明人： Alexander A. Maltsev , Alexey E. Rubtsov , Ali S. Sadri , Andrey V. Pudeyev , Sergey Tiraspolsky , Alexey Davydov
IPC分类号： H04L27/28
CPC分类号： H04L27/2628
摘要： A transmitter may include a set of stream groups, each including two or more streams producing a set of orthogonal frequency division multiplexed (OFDM) stream-symbols and a coding unit interleaving the stream-symbols into an interleaved signal. An input bit multiplexer may route an input data signal to be divided among each of the streams. An inverse fast Fourier transform unit may operate on a combined signal formed from interleaving the interleaved signals from each stream group. Each stream may include for example a baseband signal processor producing the OFDM stream-symbols.
摘要翻译：发射机可以包括一组流组，每组包括产生一组正交频分复用（OFDM）流符号的两个或更多个流，以及将流符号交织到交织信号中的编码单元。输入位复用器可以路由要在每个流之间划分的输入数据信号。反相快速傅立叶变换单元可以对从每个流组交织的交错信号形成的组合信号进行操作。每个流可以包括例如产生OFDM流符号的基带信号处理器。

25. 发明授权

US07885346B2 MIMO transmitter and method for transmitting a group of sequential OFDM symbols in accordance with an IEEE 802.16 communication standard 有权
标题翻译： MIMO发射机和根据IEEE 802.16通信标准发送一组连续OFDM符号的方法
公开(公告)号：US07885346B2
公开(公告)日：2011-02-08
申请号：US12482689
申请日：2009-06-11
申请人： John S. Sadowsky , Minnie Ho , Sumeet Sandhu , Alexander A. Maltsev , Eric A. Jacobsen , Ali S Sadri
发明人： John S. Sadowsky , Minnie Ho , Sumeet Sandhu , Alexander A. Maltsev , Eric A. Jacobsen , Ali S Sadri
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04W16/28 , H04B7/0408 , H04L27/2602 , H04W74/02
摘要： A multiple-input-multiple output (MIMO) transmitter for transmitting a group of sequential orthogonal frequency division multiplexed (OFDM) symbols on a time-division duplexed (TDD) channel in accordance with an IEEE 802.16 standard using a plurality of antennas. The MIMO transmitter comprises a spatial-frequency parser to parse a block of bits into spatial-frequency blocks of a variable number of coded bits, and subcarrier modulators to individually modulate OFDM subcarriers with the spatial-frequency blocks in accordance with spatial-frequency subcarrier modulation assignments to generate groups of symbol-modulated subcarriers. The TDD channel comprises a plurality of the groups of the OFDM subcarriers, and the OFDM subcarriers within each group of subcarriers and within each group of sequential OFDM symbols have the same spatial-frequency subcarrier modulation assignments.
摘要翻译：一种多输入多输出（MIMO）发射机，用于使用多个天线根据IEEE 802.16标准在时分双工（TDD）信道上发送一组顺序正交频分复用（OFDM）符号。 MIMO发射机包括用于将比特块解析成可变数量的编码比特的空间频率块的空间频率解析器，以及根据空间频率副载波调制单独调制具有空间频率块的OFDM子载波的子载波调制器用于生成符号调制子载波组的分配。 TDD信道包括多个OFDM子载波组，并且每个子载波组内的OFDM子载波和每个顺序的OFDM符号组内的OFDM副载波具有相同的空间频率副载波调制分配。

26. 发明授权

US07738579B2 Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system 有权
标题翻译：多天线正交频分复用通信系统中自适应比特加载的系统和方法
公开(公告)号：US07738579B2
公开(公告)日：2010-06-15
申请号：US12118838
申请日：2008-05-12
申请人： John S. Sadowsky , Minnie Ho , Sumeet Sandhu , Alexander A. Maltsev , Eric A. Jacobsen , Ali S Sadri
发明人： John S. Sadowsky , Minnie Ho , Sumeet Sandhu , Alexander A. Maltsev , Eric A. Jacobsen , Ali S Sadri
IPC分类号： H04K1/10 , H04L27/18
CPC分类号： H04W16/28 , H04B7/0408 , H04L27/2602 , H04W74/02
摘要： In an orthogonal frequency division multiplexed (OFDM) system, a transmitter and/or receiver communicate separate data streams on non-orthogonal spatial channels. Each spatial channel may use the same set of OFDM subcarriers and may take advantage of the multipath characteristics of the spatial channel allowing the communication of additional data without an increase in frequency bandwidth. Space-frequency subcarrier modulation assignments may be dynamically assigned on a per subcarrier basis as well as a per spatial channel basis to help maximize the data-carrying capacity of the channel. In some embodiments, each of the spatial channels may be associated with one of a plurality of spatially diverse antennas. In other embodiments, beamforming may be performed to allow the transmission and/or reception of signals within the spatial channels.
摘要翻译：在正交频分复用（OFDM）系统中，发射机和/或接收机在非正交空间信道上传送单独的数据流。每个空间信道可以使用相同的OFDM子载波集合，并且可以利用空间信道的多径特性，允许附加数据的通信而不增加频带宽度。可以在每个子载波基础上以及每个空间信道基础上动态分配空频子载波调制分配，以帮助最大化信道的数据承载能力。在一些实施例中，每个空间信道可以与多个空间多样的天线中的一个相关联。在其他实施例中，可以执行波束成形以允许空间信道内的信号的发送和/或接收。

27. 发明授权

US07649861B2 Multiple antenna multicarrier communication system and method with reduced mobile-station processing 有权
标题翻译：多天线多载波通信系统和减少移动台处理的方法
公开(公告)号：US07649861B2
公开(公告)日：2010-01-19
申请号：US10999592
申请日：2004-11-30
申请人： Alexander A. Maltsev , Andrey V. Pudeyev , Ali S. Sadri , Sumeet Sandhu , Sergey A. Tiraspolsky , Alexei V. Davydov
发明人： Alexander A. Maltsev , Andrey V. Pudeyev , Ali S. Sadri , Sumeet Sandhu , Sergey A. Tiraspolsky , Alexei V. Davydov
IPC分类号： H04J11/00 , H04J1/00
CPC分类号： H04L1/0026 , H04B7/0417 , H04B7/0613 , H04B7/0626 , H04L1/06 , H04L25/0204 , H04L25/03343 , H04L27/2647 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802
摘要： In a multiple-input multiple-output (MIMO) multicarrier communication system, a mobile station sends a quantized time-domain representation of the channel transfer function to a base station for use by the base station in generating beamforming coefficients for use in subsequent transmissions to the mobile station. In some embodiments, the quantized time-domain representation of the channel transfer function may be generated from selected most significant rays of an initial estimated sampled channel impulse response. Other embodiments may be described and claimed.
摘要翻译：在多输入多输出（MIMO）多载波通信系统中，移动台向基站发送信道传递函数的量化时域表示，供基站用于生成波束形成系数以用于后续传输中移动台。在一些实施例中，信道传递函数的量化时域表示可以从初始估计采样信道脉冲响应的选定的最高有效射线产生。可以描述和要求保护其他实施例。

28. 发明授权

US07649833B2 Multichannel orthogonal frequency division multiplexed receivers with antenna selection and maximum-ratio combining and associated methods 有权
标题翻译：多通道正交频分复用接收机，具有天线选择和最大比组合及相关方法
公开(公告)号：US07649833B2
公开(公告)日：2010-01-19
申请号：US10749903
申请日：2003-12-29
申请人： Ali S Sadri , Alexander A. Maltsev , Sergey E Sergeyev , Alexei V Dayydov , Vadim S Sergeyev
发明人： Ali S Sadri , Alexander A. Maltsev , Sergey E Sergeyev , Alexei V Dayydov , Vadim S Sergeyev
IPC分类号： H04J11/00
CPC分类号： H04W28/04 , H04B7/0857 , H04B7/0874 , H04L5/0023 , H04L27/2608 , H04L27/2647 , H04W24/00
摘要： A reconfigurable multichannel receiver may selectively operate in increased throughput modes and/or increased range modes. In some embodiments, the receiver may select two or more antennas from a plurality of spatially diverse antennas to receive more than one subchannel of a wideband orthogonal frequency division multiplexed (OFDM) channel. Maximum-ratio combining may be performed on corresponding symbol-modulated subcarriers from the two or more antennas, and a single OFDM symbol may be generated from contributions from the subchannels received by the two or more antennas. In other embodiments, more than one subchannel of a wideband OFDM channel may be received through a single antenna selected from a plurality of spatially diverse antennas. In other embodiments, a single subchannel may be received by a plurality of spatially diverse antennas and maximum-ratio combining may be performed on corresponding symbol-modulated subcarriers received by the antennas.
摘要翻译：可重新配置的多通道接收器可以选择性地以增加的吞吐量模式和/或增加的范围模式操作。在一些实施例中，接收机可以从多个空间多样的天线中选择两个或更多个天线，以接收宽带正交频分复用（OFDM）信道的多于一个子信道。可以对来自两个或更多个天线的相应的符号调制副载波执行最大比组合，并且可以从由两个或更多个天线接收的子信道的贡献生成单个OFDM符号。在其他实施例中，可以通过从多个空间多样的天线中选择的单个天线来接收多于一个的宽带OFDM信道的子信道。在其他实施例中，单个子信道可以由多个空间上不同的天线接收，并且可以对由天线接收的对应的符号调制子载波执行最大比合并。

29. 发明申请

US20090252257A1 MIMO TRANSMITTER AND METHOD FOR TRANSMITTING AN OFDM SYMBOL IN ACCORDANCE WITH AN IEEE 802.11 COMMUNICATION STANDARD OVER A PLURALITY OF SPATIAL CHANNELS 有权
标题翻译：用于根据IEEE 802.11通信标准在多个空间信道上发送OFDM符号的MIMO发射机和方法
公开(公告)号：US20090252257A1
公开(公告)日：2009-10-08
申请号：US12482671
申请日：2009-06-11
申请人： John Sadowsky , Minnie Ho , Sumeet Sandhu , Alexander A. Maltsev , Eric A. Jacobsen , Ali S. Sadri
发明人： John Sadowsky , Minnie Ho , Sumeet Sandhu , Alexander A. Maltsev , Eric A. Jacobsen , Ali S. Sadri
IPC分类号： H04K1/10 , H04L1/02 , H04L27/28
CPC分类号： H04W16/28 , H04B7/0408 , H04L27/2602 , H04W74/02
摘要： A multiple-input-multiple output (MIMO) transmitter for transmitting an orthogonal frequency division multiplexed (OFDM) symbol over a plurality of spatial channels using a plurality of antennas is described. The transmitter includes encoding circuitry to encode blocks of input bits in accordance with a variable encoding rate to generate blocks of encoded bits and a spatial-frequency parser to parse the blocks of encoded bits into spatial-frequency groups. The transmitter also includes subcarrier modulators to modulate each spatial-frequency group of encoded bits on one of the OFDM subcarriers to generate symbol-modulated subcarriers. Spatial-frequency groups having a greater number of encoded bits are modulated at higher-order modulation levels and spatial-frequency groups having a lesser number of encoded bits are modulated at lower-order modulation orders.
摘要翻译：描述了使用多个天线在多个空间信道上发送正交频分复用（OFDM）符号的多输入多输出（MIMO）发射机。发射机包括编码电路，用于根据可变编码速率对输入比特块进行编码以产生编码比特块和空间频率解析器，以将编码比特的块解析为空间频率组。发射机还包括子载波调制器，以调制OFDM子载波之一上的编码比特的每个空间频率组，以产生符号调制的副载波。具有更多数量的编码比特的空间频率组在高阶调制级别被调制，并且具有较少编码比特数的空间频率组以低阶调制阶调制。

30. 发明申请

US20090196232A1 METHOD AND APPARATUS TO EXCHANGE CHANNEL INFORMATION 有权
标题翻译：交换渠道信息的方法和设备
公开(公告)号：US20090196232A1
公开(公告)日：2009-08-06
申请号：US12397349
申请日：2009-03-04
申请人： Alexander A. Maltsev , Ali S. Sadri , Vadim S. Sergeyev , Sergey Tiraspolsky
发明人： Alexander A. Maltsev , Ali S. Sadri , Vadim S. Sergeyev , Sergey Tiraspolsky
IPC分类号： H04W40/00 , H04L27/28
CPC分类号： H04L1/0025 , H04L1/0003 , H04L1/0009 , H04L1/0028 , H04L1/16 , H04L5/0007 , H04L5/0046 , H04L5/006
摘要： A method and apparatus to exchange channel state information between two or more stations is provided, The channel state information may be used to adapt a power, a transmission rate and a modulation scheme of a transmitted signal. Other embodiments are described and claimed.
摘要翻译：提供了一种用于在两个或更多个站之间交换信道状态信息的方法和装置。信道状态信息可用于调整发射信号的功率，传输速率和调制方案。描述和要求保护其他实施例。

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