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1. 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。

2. 发明申请

US20050147076A1 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：US20050147076A1
公开(公告)日：2005-07-07
申请号：US10750587
申请日：2003-12-29
申请人： John Sadowsky , Minnie Ho , Sumeet Sandhu , Alexander Maltsev , Eric Jacobsen , Ali Sadri
发明人： John Sadowsky , Minnie Ho , Sumeet Sandhu , Alexander Maltsev , Eric Jacobsen , Ali Sadri
IPC分类号： H04L1/06 , H04L27/26 , H04W16/28 , H04W74/02 , H04J1/00
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。

3. 发明授权

US07881390B2 Increased discrete point processing in an OFDM communication system 有权
标题翻译：在OFDM通信系统中增加离散点处理
公开(公告)号：US07881390B2
公开(公告)日：2011-02-01
申请号：US11291800
申请日：2005-11-30
申请人： John Sadowsky , Alexander A. Maltsev , Vadim S. Sergeyev , Alexei V. Davydov
发明人： John Sadowsky , Alexander A. Maltsev , Vadim S. Sergeyev , Alexei V. Davydov
IPC分类号： H04K1/10
CPC分类号： H04L27/2602 , H04L27/2607
摘要： Methods and apparatus provide increased symbol length with more subcarriers in a fixed-bandwidth system. The subcarriers spacing may be reduced to provide increased symbol length and enable higher throughput. In one implementation, a system compatible with the IEEE P802.11n proposal can use 128 subcarriers in 20 MHz operation to provide increased throughput in lower-bandwidth channel operation.
摘要翻译：方法和装置在固定带宽系统中提供具有更多子载波的增加的符号长度。可以减小子载波间隔以提供增加的符号长度并实现更高的吞吐量。在一个实现中，与IEEE P802.11n提议兼容的系统可以在20MHz操作中使用128个子载波来在较低带宽信道操作中提供增加的吞吐量。

4. 发明申请

US20050220199A1 OFDM system with per subcarrier phase rotation 有权
标题翻译：每个子载波相位旋转的OFDM系统
公开(公告)号：US20050220199A1
公开(公告)日：2005-10-06
申请号：US10815097
申请日：2004-03-31
申请人： John Sadowsky , Shmuel Levy , Sumeet Sandhu , Keith Holt
发明人： John Sadowsky , Shmuel Levy , Sumeet Sandhu , Keith Holt
IPC分类号： H04J99/00 , H04L1/06 , H04L27/26 , H04K1/10
CPC分类号： H04L27/2634 , H04L1/06 , H04L27/2602
摘要： Subcarrier phase rotation is implemented in an OFDM transmitting apparatus to overcome problems such as, for example, non-frequency selective multipath fading. In at least one embodiment, subcarrier phase rotation is practiced in an OFDM system implementing multiple input multiple output (MIMO) techniques.
摘要翻译：子载波相位旋转在OFDM发送装置中实现，以克服诸如非频率选择性多径衰落之类的问题。在至少一个实施例中，在实施多输入多输出（MIMO）技术的OFDM系统中实施副载波相位旋转。

5. 发明授权

US07333555B2 Device, system and method for wireless combined-signal communication 失效
标题翻译：无线组合信号通信的装置，系统和方法
公开(公告)号：US07333555B2
公开(公告)日：2008-02-19
申请号：US10812385
申请日：2004-03-30
申请人： Gal Basson , Jorge Myszne , Yuval Finkelstein , Shay Waxman , Assaf Kasher , John Sadowsky
发明人： Gal Basson , Jorge Myszne , Yuval Finkelstein , Shay Waxman , Assaf Kasher , John Sadowsky
IPC分类号： H04L27/00 , H04L23/00
CPC分类号： H04L1/0015 , H04L1/04
摘要： Briefly, some embodiments of the invention may provide devices, systems and methods for wireless combined-signal communication. For example, a method in accordance with an embodiment of the invention may include transmitting a combined signal over a combined channel by mapping a first block of said combined signal to be carried by a first sub-channel of said combined channel and mapping a second block, substantially identical to said first block, to be carried by a second sub-channel of said combined channel.
摘要翻译：简而言之，本发明的一些实施例可以提供用于无线组合信号通信的设备，系统和方法。例如，根据本发明的实施例的方法可以包括：通过映射要由所述组合信道的第一子信道承载的所述组合信号的第一块，并且映射第二块，通过组合信道来发送组合信号，与所述第一块基本相同，由所述组合信道的第二子信道承载。

6. 发明申请

US20050220206A1 Device, system and method for wireless combined-signal communication 失效
标题翻译：无线组合信号通信的装置，系统和方法
公开(公告)号：US20050220206A1
公开(公告)日：2005-10-06
申请号：US10812385
申请日：2004-03-30
申请人： Gal Basson , Jorge Myszne , Yuval Finkelstein , Shai Waxman , Assaf Kasher , John Sadowsky
发明人： Gal Basson , Jorge Myszne , Yuval Finkelstein , Shai Waxman , Assaf Kasher , John Sadowsky
IPC分类号： H04L1/04 , H04L1/02
CPC分类号： H04L1/0015 , H04L1/04
摘要： Briefly, some embodiments of the invention may provide devices, systems and methods for wireless combined-signal communication. For example, a method in accordance with an embodiment of the invention may include transmitting a combined signal over a combined channel by mapping a first block of said combined signal to be carried by a first sub-channel of said combined channel and mapping a second block, substantially identical to said first block, to be carried by a second sub-channel of said combined channel.
摘要翻译：简而言之，本发明的一些实施例可以提供用于无线组合信号通信的设备，系统和方法。例如，根据本发明的实施例的方法可以包括：通过映射要由所述组合信道的第一子信道承载的所述组合信号的第一块，并且映射第二块，通过组合信道来发送组合信号，与所述第一块基本相同，由所述组合信道的第二子信道承载。

7. 发明申请

US20050111345A1 Forward error correction coding in communication networks 失效
标题翻译：通信网络中的前向纠错编码
公开(公告)号：US20050111345A1
公开(公告)日：2005-05-26
申请号：US10723133
申请日：2003-11-25
申请人： Eric Jacobsen , John Sadowsky
发明人： Eric Jacobsen , John Sadowsky
IPC分类号： H04L1/00 , H04L1/18 , H04L27/26 , H04J11/00
CPC分类号： H04L1/005 , H04L1/0041 , H04L1/0057 , H04L27/2602
摘要： Methods, apparatus and systems are disclosed for block encoding/decoding information wireless networks having narrow decoding latency restrictions. A method includes identifying a length of information to be sent in a block code and encoding the information to be sent in the block code into one or more codewords, where the number of codewords and the amount of information encoded within each codeword is adjusted based on the identified length and to achieve a similar codeword error probability for each codeword considering available decoding time for decoding a last codeword is less than available decoding time for decoding a first codeword. In certain implementations low density parity check (LDPC) encoding may be used in combination with OFDM to provide reliable communications in a high throughput WLAN.
摘要翻译：公开了用于具有窄解码延迟限制的块编码/解码信息无线网络的方法，装置和系统。一种方法包括识别要在块码中发送的信息的长度，并将要在块码中发送的信息编码成一个或多个码字，其中码字的数量和在每个码字内编码的信息量基于考虑用于解码最后一个码字的可用解码时间，识别的长度并且为每个码字实现类似的码字错误概率小于用于解码第一码字的可用解码时间。在某些实施方式中，低密度奇偶校验（LDPC）编码可以与OFDM组合使用以在高吞吐量WLAN中提供可靠的通信。

8. 发明申请

US20080025430A1 SYMBOL DE-MAPPING METHODS IN MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEMS 有权
标题翻译：多输入多输出系统中的符号去映射方法
公开(公告)号：US20080025430A1
公开(公告)日：2008-01-31
申请号：US11844200
申请日：2007-08-23
申请人： John Sadowsky
发明人： John Sadowsky
IPC分类号： H04L1/02
CPC分类号： H04L25/03216 , H04L25/03222 , H04L25/03229 , H04L25/067 , H04L27/3488 , H04L27/38 , H04L2025/0342 , H04L2025/03426
摘要： In a multiple-input multiple-output (MIMO) system, multiple receive antennas produce a received signal vector, Y, which includes an element for each of the receive antennas. In an embodiment of a de-mapping method performed within a MIMO receiver, a quadrature phase shift keying (QPSK) search is performed within a search space that includes the full constellation of symbol points. Based on the results of the QPSK search, the search space is reduced to fewer than all of the quadrants, and the received signal vector data is scaled and transformed to the reduced search space. A lower-level QPSK search is performed, and the process is repeated until the modulation order is reduced to a QPSK constellation. Hard or soft decisions corresponding to the search results may then be passed to a decoder.
摘要翻译：在多输入多输出（MIMO）系统中，多个接收天线产生接收信号向量Y，其包括用于每个接收天线的元件。在MIMO接收机内执行解映射方法的实施例中，在包括符号点的全部星座的搜索空间内执行正交相移键控（QPSK）搜索。基于QPSK搜索的结果，搜索空间减少到比所有象限少，并且接收的信号向量数据被缩放并变换到缩小搜索空间。执行较低级的QPSK搜索，并且重复该处理，直到调制阶数减小到QPSK星座。然后可以将对应于搜索结果的硬判决或软判决传递给解码器。

9. 发明申请

US20060071807A1 Method and apparatus for performing sequential closed loop MIMO 有权
标题翻译：用于执行顺序闭环MIMO的方法和装置
公开(公告)号：US20060071807A1
公开(公告)日：2006-04-06
申请号：US10954582
申请日：2004-09-30
申请人： John Sadowsky
发明人： John Sadowsky
IPC分类号： G08C19/00
CPC分类号： H04B7/0634 , H04B7/0417 , H04B7/0617 , H04B7/0636
摘要： In a communication system using closed loop MIMO, beam forming information may be fed back from a receiver to a transmitter sequentially over a number of frames. The beam forming matrices that are fed back may be quantized.
摘要翻译：在使用闭环MIMO的通信系统中，波束形成信息可以在多个帧上顺序地从接收机反馈到发射机。反馈的波束形成矩阵可以被量化。

10. 发明授权

US5933082A Passive alarm system for blind and visually impaired individuals 失效
标题翻译：盲人和视障人士的被动报警系统
公开(公告)号：US5933082A
公开(公告)日：1999-08-03
申请号：US624671
申请日：1996-04-02
申请人： Joseph Lawrence Abita , John Sadowsky , Wolfger Schneider , Robert W. Massof
发明人： Joseph Lawrence Abita , John Sadowsky , Wolfger Schneider , Robert W. Massof
IPC分类号： G08B21/02 , G08B21/00
CPC分类号： G08B21/02
摘要： The device assists those who are visually handicapped and, in particular, warns blind or visually impaired travellers that they have entered a potentially dangerous area proximal to the edge of boarding platforms of the type typically found in public railway transit systems. An InfraRed Integrated Information System consists of an array of infrared transmitters and a portable detector/warning device to be held by the blind traveller. The transmitters create a beam of infrared light which bathes the section of the platform proximal to the platform edge. As the traveller moves into the region of the platform covered by the emission, the sensors in the warning device are activated and by audio, tactile or other stimuli alert the traveller of entry into the danger zone.
摘要翻译：该设备协助那些视力障碍者，特别是向盲人或视力障碍的旅客发出警告，他们进入靠近公共铁路运输系统中通常所见类型的登机台边缘的潜在危险区域。 InfraRed综合信息系统由一系列红外发射器和由盲人保持的便携式探测器/警告装置组成。发射器产生一束红外光，将平台的部分靠近平台边缘。随着旅行者移动到被排放物覆盖的平台的区域中，警告装置中的传感器被激活，并且通过音频，触觉或其他刺激来警告旅行者进入危险区域。

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