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11. 发明申请

US20090245405A1 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：用于根据IEEE 802.16通信标准发送一组顺序OFDM符号的MIMO发射机和方法
公开(公告)号：US20090245405A1
公开(公告)日：2009-10-01
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 , H04J11/00 , H04L5/14
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子载波具有相同的空间频率副载波调制分配。

12. 发明授权

US07280804B2 Channel adaptation using variable sounding signal rates 有权
标题翻译：使用可变探测信号频率的信道适配
公开(公告)号：US07280804B2
公开(公告)日：2007-10-09
申请号：US10769414
申请日：2004-01-30
申请人： Eric A. Jacobsen , Shahrnaz Azizi
发明人： Eric A. Jacobsen , Shahrnaz Azizi
IPC分类号： H04B17/00
CPC分类号： H04L1/20 , H04L1/0001 , H04L25/0216 , H04L25/0226 , H04L27/2613
摘要： Systems, devices and methods for updating link adaptations in multi-carrier modulated signals between an access point (AP) and a wireless local area network (WLAN) station (STA) include (are configured for) periodically transmitting a channel sounding signal from the AP. The STA receives each unsolicited channel sounding signal and evaluates the current channel conditions between the AP and STA. The AP adjusts a rate of transmission of the channel sounding signals in accordance with the channel coherence time so that the channel estimates performed by the STA will be valid within the time varying characteristics of the channel. Depending on the length of the coherence time for network environment, the channel sounding signals may be AP beacons, low overhead signal fragments with no payload, or a combination of both.
摘要翻译：用于更新在接入点（AP）和无线局域网（WLAN）站（STA）之间的多载波调制信号中的链路自适应的系统，设备和方法包括（被配置用于）周期性地从AP接收信道探测信号。 STA接收每个未经请求的信道探测信号，并评估AP和STA之间的当前信道状况。 AP根据信道相干时间调整信道探测信号的传输速率，使得由STA执行的信道估计将在信道的时变特性内有效。根据网络环境的相干时间的长度，信道探测信号可以是AP信标，没有有效负载的低开销信号片段或两者的组合。

13. 发明授权

US07263651B2 Method and apparatus for varying lengths of low density party check codewords 有权
标题翻译：用于改变低密度派对检查码字长度的方法和装置
公开(公告)号：US07263651B2
公开(公告)日：2007-08-28
申请号：US10815311
申请日：2004-03-31
申请人： Bo Xia , Eric A. Jacobsen
发明人： Bo Xia , Eric A. Jacobsen
IPC分类号： H03M13/13 , H03M13/35
CPC分类号： H04L1/0051 , H03M13/1114 , H03M13/1117 , H03M13/1128 , H03M13/3707 , H04L1/0057 , H04W84/12
摘要： A method and apparatus for encoding/decoding information using low density parity check (LDPC) codewords of varying lengths. In one implementation, an encoder/decoder uses a parity check matrix having a size that corresponds to a length of information for each codeword. In one example, the size of the parity check matrix may be retrieved from multiple stored matrices having different sizes. In other examples, a mother code matrix may be dynamically adjusted by puncturing parity bits and/or deleting information bits. Other inventive embodiments and adaptations are also disclosed.
摘要翻译：一种使用不同长度的低密度奇偶校验（LDPC）码字对信息进行编码/解码的方法和装置。在一个实现中，编码器/解码器使用具有对应于每个码字的信息长度的大小的奇偶校验矩阵。在一个示例中，可以从具有不同大小的多个存储的矩阵中检索奇偶校验矩阵的大小。在其他示例中，母码矩阵可以通过删截奇偶校验位和/或删除信息比特来动态地调整。还公开了其它发明实施例和适配。

14. 发明授权

US07230911B2 Sparse channel estimation for orthogonal frequency division multiplexed signals 有权
标题翻译：正交频分复用信号的稀疏信道估计
公开(公告)号：US07230911B2
公开(公告)日：2007-06-12
申请号：US09852376
申请日：2001-05-10
申请人： Eric A. Jacobsen
发明人： Eric A. Jacobsen
IPC分类号： H04J11/00
CPC分类号： H04L25/0234 , H04L27/2647
摘要： A computationally efficient channel estimation technique for use within an orthogonal frequency division multiplexing (OFDM) communication system determines coefficients of a channel transfer function by calculating the dot products of a pilot vector and a plurality of interpolation vectors. One dot product is preferably calculated for each subcarrier of interest within the system. The pilot vector is extracted from an OFDM symbol received from a communication channel. In a preferred approach, a number of interpolation vectors are precalculated and stored within a communication device for subsequent use during channel estimation and equalization operations. The technique is highly flexible and can be implemented using, for example, a variable user block size or a variable pilot vector size.
摘要翻译：在正交频分复用（OFDM）通信系统中使用的计算有效的信道估计技术通过计算导频矢量和多个插值向量的点积来确定信道传递函数的系数。对于系统内的感兴趣的每个子载波，优选地计算一个点积。从从通信信道接收的OFDM符号中提取导频向量。在优选的方法中，预先计算多个内插向量并将其存储在通信设备中，以便在信道估计和均衡操作期间随后使用。该技术是高度灵活的，并且可以使用例如可变用户块大小或可变导频矢量大小来实现。

15. 发明授权

US08396147B2 MIMO transmitter for transmitting a group of sequential OFDM symbols using a plurality of antennas 有权
标题翻译： MIMO发射机，用于使用多个天线发送一组顺序OFDM符号
公开(公告)号：US08396147B2
公开(公告)日：2013-03-12
申请号：US12757117
申请日：2010-04-09
申请人： John S. Sadowsky , Minnie Ho , Eric A. Jacobsen , Alexander A. Maltsev , Ali S. Sadri , Sumeet Sandhu
发明人： John S. Sadowsky , Minnie Ho , Eric A. Jacobsen , Alexander A. Maltsev , Ali S. Sadri , Sumeet Sandhu
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04W16/28 , H04B7/0408 , H04L27/2602 , H04W74/02
摘要： A MIMO transmitter and method for transmitting a group of sequential OFDM symbols on a downlink channel using a plurality of antennas is disclosed herein. Groups of OFDM subcarriers are individually modulated in accordance with spatial-frequency subcarrier modulation assignments to generate groups of symbol-modulated subcarriers, corresponding symbol-modulated subcarriers are combined for transmission on each of a plurality of spatial channels, and beamforming is performed on the combined symbol-modulated subcarriers for transmission over the spatial channels. The 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. The spatial-frequency subcarrier modulation assignments for each group are determined based on feedback by a receiver, which is determined from spatial channel characteristics of the spatial channels.
摘要翻译：这里公开了一种用于使用多个天线在下行链路信道上发送一组顺序OFDM符号的MIMO发射器和方法。根据空间 - 频率副载波调制分配对OFDM子载波组进行单独调制，以生成符号调制子载波组，将多个空间信道中的每一个组合对应的符号调制副载波进行传输，并对组合用于在空间信道上传输的符号调制副载波。信道包括多个OFDM子载波组和每个子载波组内的OFDM子载波，并且在每组顺序OFDM符号内具有相同的空间频率副载波调制分配。基于由空间信道的空间信道特性确定的接收机的反馈来确定每个组的空间频率副载波调制分配。

16. 发明申请

US20100098181A1 METHOD AND MOBILE COMMUNICATION STATION FOR COMMUNICATING OFDM SYMBOLS USING TWO OR MORE ANTENNAS 有权
标题翻译：使用两个或多个天线来通信OFDM符号的方法和移动通信站
公开(公告)号：US20100098181A1
公开(公告)日：2010-04-22
申请号：US12643389
申请日：2009-12-21
申请人： Eric A. Jacobsen , Adrian P. Stephens
发明人： Eric A. Jacobsen , Adrian P. Stephens
IPC分类号： H04L27/28
CPC分类号： H04W16/28 , H04B7/0408 , H04L27/2602 , H04W74/02
摘要： A method and mobile communication station for communicating orthogonal frequency division multiplexed (OFDM) symbols uses two or more antennas. The antenna parameters are set for beamforming, a transmit power level is initially set, and subcarrier modulation assignments are selected after the antenna parameters and the transmit power level are set to achieve a quality-of-service level for a particular application and data type of a service flow. The transmit power level may also be set based on a desired cell size.
摘要翻译：用于传送正交频分复用（OFDM）符号的方法和移动通信站使用两个或更多个天线。天线参数被设置用于波束形成，初始设置发射功率电平，并且在天线参数和发射功率电平被设置为实现特定应用的服务质量水平和数据类型之后选择副载波调制分配一个服务流程。也可以基于期望的小区大小来设置发射功率水平。

17. 发明授权

US07665008B2 Method and apparatus for implementing a low density parity check code in a wireless system 失效
标题翻译：在无线系统中实现低密度奇偶校验码的方法和装置
公开(公告)号：US07665008B2
公开(公告)日：2010-02-16
申请号：US10815133
申请日：2004-03-31
申请人： Bo Xia , Eric A. Jacobsen
发明人： Bo Xia , Eric A. Jacobsen
IPC分类号： H03M13/00
CPC分类号： H04L1/0057 , H03M13/036 , H03M13/118 , H03M13/1194 , H03M13/6516 , H04L1/0041
摘要： A low density parity check (LDPC) code is used within a wireless apparatus to perform forward error correction (FEC) coding. In at least embodiment of the invention, a (2000, 1600) bit-length LDPC code is used.
摘要翻译：在无线装置内使用低密度奇偶校验（LDPC）码来执行前向纠错（FEC）编码。在本发明的至少实施例中，使用（2000,1600）比特长度LDPC码。

18. 发明授权

US07395495B2 Method and apparatus for decoding forward error correction codes 有权
标题翻译：用于解码前向纠错码的方法和装置
公开(公告)号：US07395495B2
公开(公告)日：2008-07-01
申请号：US10798643
申请日：2004-03-10
申请人： Eric A. Jacobsen
发明人： Eric A. Jacobsen
IPC分类号： G06F11/00 , H03M13/00
CPC分类号： H04L1/0051 , H03M13/1114 , H03M13/1117 , H03M13/1128 , H03M13/3707 , H04L1/0057 , H04W84/12
摘要： A method for decoding information received at a network device may include a first decoding process which applies a first algorithm iteratively until a stopping criterion is reached and a second decoding process which may flip a logic state of one or more bits. In one implementation using low density parity check (LDPC) codewords, bits may be flipped after evaluating check nodes having the lowest metrics and/or assessing the parity relationships of bit nodes and/or edges associated with those check nodes. Devices and systems for decoding are also disclosed as well as various other embodiments.
摘要翻译：用于解码在网络设备处接收的信息的方法可以包括第一解码过程，其迭代地应用第一算法直到达到停止标准，并且可以翻转一个或多个比特的逻辑状态的第二解码过程。在使用低密度奇偶校验（LDPC）码字的一个实现中，可以在评估具有最低度量的校验节点和/或评估与这些校验节点相关联的比特节点和/或边缘的奇偶校验关系之后翻转比特。还公开了用于解码的设备和系统以及各种其它实施例。

19. 发明授权

US07352696B2 Method and apparatus to select an adaptation technique in a wireless network 有权
标题翻译：在无线网络中选择适应技术的方法和装置
公开(公告)号：US07352696B2
公开(公告)日：2008-04-01
申请号：US10637438
申请日：2003-08-08
申请人： Adrian P. Stephens , Duncan Kitchin , Eric A. Jacobsen , Keith Holt
发明人： Adrian P. Stephens , Duncan Kitchin , Eric A. Jacobsen , Keith Holt
IPC分类号： H04L1/00 , H04L12/28 , H04Q7/00
CPC分类号： H04L1/0019 , H04L1/0003 , H04L1/1671 , H04L5/1438 , H04L27/2608
摘要： An adaptation technique is selected for use in a wireless network based on estimated throughput. In at least one embodiment, throughput is estimated for a wireless channel for both prefix adaptation and postfix adaptation. An adaptation technique is then selected based on the estimates. In some embodiments, an adaptation validity duration is determined to gauge the potential effectiveness of adaptation information associated with a wireless channel.
摘要翻译：基于估计的吞吐量，选择适配技术用于无线网络。在至少一个实施例中，针对用于前缀适配和后缀自适应的无线信道估计吞吐量。然后基于估计选择适应技术。在一些实施例中，确定适应有效期限以测量与无线信道相关联的适配信息的潜在有效性。

20. 发明授权

US07197315B1 Method and apparatus to select a channel using performance metrics 有权
标题翻译：使用性能指标选择频道的方法和装置
公开(公告)号：US07197315B1
公开(公告)日：2007-03-27
申请号：US10637335
申请日：2003-08-08
申请人： Adrian P. Stephens , Eric A. Jacobsen
发明人： Adrian P. Stephens , Eric A. Jacobsen
IPC分类号： H04M7/20
CPC分类号： H04W36/22
摘要： A method and apparatus to select a channel of operation for a wireless network device may examine channels supported by the device to gather information regarding present use of the channels. A best channel may be determined for the wireless network device by identifying a channel that maximizes a predetermined performance metric.
摘要翻译：选择无线网络设备的操作信道的方法和装置可以检查由设备支持的信道以收集关于信道的当前使用的信息。可以通过识别最大化预定性能度量的信道来为无线网络设备确定最佳信道。

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