公开(公告)号：US07584406B2

公开(公告)日：2009-09-01

申请号：US11313906

申请日：2005-12-20

申请人： Huaning Niu ,  Chiu Ngo

发明人： Huaning Niu ,  Chiu Ngo

IPC分类号： H03M13/03

CPC分类号： H03M13/1102 ,  H03M13/31 ,  H03M13/618 ,  H03M13/6362

摘要： An improved LDPC encoding with concatenation rule and code size with packet lengths specified in octets is provided. The LDPC block size is selected to be an integer number of OFDM tones. The concatenation rule is an improvement of the shortening and puncturing scheme for low data rate. The improvement is two fold. First, the code length is selected based on the number of transmitted information bits in octets (HTLENGTH). Second, it is determined whether one extra OFDM symbol padding should be added based on the number of shortening bits in the last codeword and the available padding bits in the last OFDM symbol.

摘要翻译： 提供了具有以字节指定的分组长度的级联规则和码大小的改进的LDPC编码。 LDPC块大小被选择为整数个OFDM音调。 连接规则是低数据速率缩短和打孔方案的改进。 改善是两倍。 首先，基于八位字节（HTLENGTH）中发送的信息位的数量来选择代码长度。 第二，确定是否应该基于最后一个码字中的缩短比特数和最后一个OFDM符号中的可用填充比特来添加一个额外的OFDM符号填充。

公开(公告)号：US20090092039A1

公开(公告)日：2009-04-09

申请号：US11906741

申请日：2007-10-03

申请人： Huaning Niu ,  Chiu Ngo

发明人： Huaning Niu ,  Chiu Ngo

IPC分类号： H04J11/00

CPC分类号： H04L27/2613 ,  H04N21/2383 ,  H04N21/4122 ,  H04N21/43615 ,  H04N21/43637 ,  H04N21/4382 ,  H04W28/06

摘要： A method and system for wireless transmission of information is provided. Such wireless transmission of information involves constructing a payload unit for data, appending a preamble to the payload unit, wherein the preamble comprises a PHY preamble including a MAC header for the payload unit, and transmitting at least the preamble of the payload unit over a wireless channel.

摘要翻译： 提供了一种无线传输信息的方法和系统。 信息的这种无线传输涉及为数据构建有效载荷单元，向有效负载单元附加前导码，其中前导码包括PHY前同步码，其包括用于有效载荷单元的MAC报头，以及至少通过无线传输有效负载单元的前导码 渠道。

公开(公告)号：US20090086638A1

公开(公告)日：2009-04-02

申请号：US11906193

申请日：2007-10-01

申请人： Huaning Niu ,  Chiu Ngo

发明人： Huaning Niu ,  Chiu Ngo

IPC分类号： H04L12/26

CPC分类号： H04L1/1867 ,  H03M13/1102 ,  H04L1/0084 ,  H04L1/1819 ,  H04L43/0823

摘要： A method and system for wireless data communication is provided, which involves constructing a data payload containing data, partitioning the data payload into fragments, performing LDPC encoding on each fragment, and transmitting the data payload including encoded fragments over a wireless channel.

摘要翻译： 提供了一种用于无线数据通信的方法和系统，其包括构建包含数据的数据有效载荷，将数据有效载荷分割成片段，对每个片段执行LDPC编码，以及通过无线信道发送包括编码片段的数据有效载荷。

公开(公告)号：US20060222095A1

公开(公告)日：2006-10-05

申请号：US11100239

申请日：2005-04-05

申请人： Huaning Niu ,  Chiu Ngo

发明人： Huaning Niu ,  Chiu Ngo

IPC分类号： H04K1/10

CPC分类号： H04L27/2662 ,  H04L27/2657 ,  H04L27/2675

摘要： A symbol detector for an OFDM receiver determines the correlation of corresponding samples of at least two received preamble symbol samples, one of the samples delayed a predetermined duration with respect to the other; determines a timing metric based on the correlation results; detects multiple peaks in the timing metric; indicates a symbol detection based on the multiple peaks detected in the timing metric; and gets a refined CFO estimation using averaging the phase information across these multiple peaks.

公开(公告)号：US20060098760A1

公开(公告)日：2006-05-11

申请号：US10984248

申请日：2004-11-08

申请人： Jun Shen ,  Chiu Ngo ,  Huaning Niu

发明人： Jun Shen ,  Chiu Ngo ,  Huaning Niu

IPC分类号： H04L27/04

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0671 ,  H04B7/0697 ,  H04B7/0891 ,  H04L25/0224

摘要： A method of transmission in a wireless communication system having a transmitter and a receiver. In the transmitter: signals are encoded using a space-domain precoder for spatial multiplexing, time-domain variable delay is introduced at each signal communication path for time diversity, and the signal are transmitted to the receiver. In the receiver the signal transmissions from the transmitter are decoded using a space-domain decoder, wherein time diversity and spatial multiplexing are combined, to increase communication robustness and spectral efficiency.

公开(公告)号：US07707479B2

公开(公告)日：2010-04-27

申请号：US11300211

申请日：2005-12-13

申请人： Huaning Niu ,  Chiu Ngo

发明人： Huaning Niu ,  Chiu Ngo

IPC分类号： H03M13/00

CPC分类号： H03M13/116 ,  H03M13/1185 ,  H03M13/618 ,  H03M13/6393

摘要： A method of generating structured irregular LDPC codes for a wireless network such as a wireless local area network (WLAN) system, allowing systematic generation of improved code ensembles using density evolution, and providing essentially the best tradeoff between decoding threshold and decoding complexity. Such an LDPC code has a higher diversity order for MIMO systems, with better built-in interleaving capability. Further, the code dimension can be tailored to 802.11n system parameters such as the number of sub-carriers and delay. The code also provides an improved girth control scheme, provides flexible length with different expanding factors, and supports simple encoding and shortening for multiple rates.

摘要翻译： 一种用于诸如无线局域网（WLAN）系统的无线网络的结构化不规则LDPC码的方法，允许使用密度演进来系统地生成改进的码集合，并且在解码阈值和解码复杂度之间基本上提供最佳权衡。 这样的LDPC码对于MIMO系统具有更高的分集顺序，具有更好的内置交错能力。 此外，代码维度可以针对802.11n系统参数进行调整，例如子载波的数量和延迟。 该代码还提供了改进的周长控制方案，提供了具有不同扩展因素的灵活长度，并且支持多种速率的简单编码和缩短。

公开(公告)号：US20090077611A1

公开(公告)日：2009-03-19

申请号：US12024898

申请日：2008-02-01

申请人： Harkirat Singh ,  Xiangping Qin ,  Huai-Rong Shao ,  Chiu Ngo ,  Huaning Niu

发明人： Harkirat Singh ,  Xiangping Qin ,  Huai-Rong Shao ,  Chiu Ngo ,  Huaning Niu

IPC分类号： H04N7/173 ,  H04N11/02

CPC分类号： H04N21/4402 ,  H04N19/895 ,  H04N21/43637 ,  H04N21/44227

摘要： A system and method for wireless communication of uncompressed video data are disclosed. One embodiment of a method of wireless communication for video data includes concealing corrupted portions of video data. The method includes receiving a plurality of video packets transmitted over a wireless channel. Each of the video packets includes a plurality of data blocks, and the data blocks in the plurality of video packets together form video data representing at least part of a video frame. Each of the data blocks is encoded with an error correction code (ECC). The method also includes determining whether any of the plurality of data blocks in the video packets has been corrupted while being transmitted over the wireless channel; and replacing a corrupted data block with an uncorrupted data block selected from the plurality of data blocks in the plurality of video packets. The corrupted data block includes a first displayable element on the video frame and the uncorrupted data block includes a second displayable element on the video frame. The uncorrupted data block is selected at least partially based on proximity between the first and second displayable elements on the video frame.

摘要翻译： 公开了一种用于无压缩视频数据的无线通信的系统和方法。 视频数据的无线通信方法的一个实施例包括隐藏视频数据的损坏部分。 该方法包括接收通过无线信道发送的多个视频分组。 每个视频分组包括多个数据块，并且多个视频分组中的数据块一起形成表示视频帧的至少一部分的视频数据。 每个数据块用纠错码（ECC）编码。 该方法还包括确定视频分组中的多个数据块中的任一个是否在通过无线信道发送时已被破坏; 以及用从所述多个视频分组中的所述多个数据块中选择的未破坏的数据块替换损坏的数据块。 损坏的数据块包括视频帧上的第一可显示元素，并且未损坏的数据块在视频帧上包括第二可显示元素。 至少部分地基于视频帧上的第一和第二可显示元件之间的接近度来选择未破坏的数据块。

公开(公告)号：US20080192774A1

公开(公告)日：2008-08-14

申请号：US11706457

申请日：2007-02-13

申请人： Harkirat Singh ,  Huaning Niu ,  Chiu Ngo

发明人： Harkirat Singh ,  Huaning Niu ,  Chiu Ngo

IPC分类号： H04J3/24

CPC分类号： H04L1/1614 ,  H04J3/1641 ,  H04L1/0072 ,  H04L1/1809 ,  H04L1/1867

摘要： A method and system for packet communication in a wireless system, implementing a process for aggregating multiple data units into a single aggregated frame, transported as payload in a carrier frame having a header, and separately protecting said header and payload with error recovery information for transmission over a wireless channel. The process further includes transmitting the carrier frame from a sender to a receiver over a wireless channel, using the error recovery information to detect if a data unit in the payload was received in error, and informing the sender to selectively retransmit a correct copy of the data unit received in error.

摘要翻译： 一种用于无线系统中的分组通信的方法和系统，实现用于将多个数据单元聚合成单个聚合帧的过程，在具有报头的载波帧中作为有效载荷传输，并且用传输的错误恢复信息单独保护所述报头和有效载荷 通过无线频道。 该过程进一步包括使用错误恢复信息来检测有效载荷中的数据单元是否被错误地接收到的，通过无线信道将载波帧从发送方发送到接收方，并且通知发送方有选择地重传正确的副本 收到错误的数据单元。

公开(公告)号：US20080101493A1

公开(公告)日：2008-05-01

申请号：US11588716

申请日：2006-10-27

申请人： Huaning Niu ,  Chiu Ngo

发明人： Huaning Niu ,  Chiu Ngo

IPC分类号： H04L1/02

CPC分类号： H04L1/0675 ,  H04L1/0643

摘要： A method and system for wireless communication over a wireless channel combines space-time coding with statistical transmit beamforming. As such, instantaneous channel state information is not required. In one implementation, statistical beamforming is performed by employing an optimal spreading matrix as a function of a transmit correlation matrix, without requiring instantaneous channel state information.

摘要翻译： 通过无线信道进行无线通信的方法和系统将时空编码与统计发射波束形成相结合。 因此，不需要瞬时信道状态信息。 在一个实现中，通过采用最佳扩展矩阵作为发射相关矩阵的函数来执行统计波束成形，而不需要瞬时信道状态信息。

公开(公告)号：US20070270173A1

公开(公告)日：2007-11-22

申请号：US11314928

申请日：2005-12-20

申请人： Huaning Niu ,  Jyh Horng ,  Chiu Ngo

发明人： Huaning Niu ,  Jyh Horng ,  Chiu Ngo

IPC分类号： H04B7/00

CPC分类号： H04W52/346 ,  H04B7/0413 ,  H04B7/0443 ,  H04B7/0617

摘要： A method and system for constant-power loading for asymmetric antenna configurations. The sounding packet, the sounding bit in HT-SIG field, and the HT-LTF field in the PLCP protocol data unit (PPDU) are used to determine the number of transmit antennas and the number of data streams, wherein if the number of transmission streams is the same as the number of data streams, then a first set of power loading level (fixed uneven power loading) is applied, otherwise a second set of power loading level is applied. Alternatively, one additional bit in the HT-SIG filed of PLCP protocol data unit (PPDU) signaling field is used to signal the set of power loading level used.

摘要翻译： 用于不对称天线配置的恒功率负载的方法和系统。 探测分组，HT-SIG领域的探测位和PLCP协议数据单元（PPDU）中的HT-LTF字段用于确定发射天线的数量和数据流的数量，其中如果传输次数 流与数据流的数量相同，则应用第一组功率负载水平（固定不均匀功率负载），否则应用第二组功率负载水平。 或者，使用PLCP协议数据单元（PPDU）信令字段的HT-SIG档案中的一个附加位来表示所使用的一组功率负载水平。