公开(公告)号：WO2005071898A1

公开(公告)日：2005-08-04

申请号：PCT/US2005/000736

申请日：2005-01-11

Applicant: INTEL CORPORATION ,  STEPHENS, Adrian ,  SADOWSKY, John

Inventor： STEPHENS, Adrian ,  SADOWSKY, John

IPC: H04L12/28

CPC classification number: H04L27/345 ,  H03M13/255 ,  H04L5/0007 ,  H04L5/0044 ,  H04L27/20 ,  H04L27/2602 ,  H04L27/2627 ,  H04L27/2649 ,  H04W84/12

Abstract: Methods and systems for communicating in a wireless network may distinguish different types of packet structures by modifying the phase of a modulation constellation, such as a binary phase shift keying (BPSK) constellation, in a signal field. Receiving devices may identify the type of packet structure associated with a transmission or whether the signal field is present by the phase of the modulation constellation used for mapping for the signal field. In one embodiment, the phase of the modulation constellation may be determined by examining the energy of the I and Q components after Fast Fourier Transform. Various specific embodiments and variations are also disclosed.

Abstract translation: 在无线网络中进行通信的方法和系统可以通过在信号域中修改诸如二进制相移键控（BPSK）星座的调制星座的相位来区分不同类型的分组结构。 接收设备可以识别与传输相关联的分组结构的类型，或者信号字段是否存在于用于信号字段的映射的调制星座的相位。 在一个实施例中，可以通过检查快速傅里叶变换后的I和Q分量的能量来确定调制星座的相位。 还公开了各种具体实施方案和变体。

公开(公告)号：WO2005067241A1

公开(公告)日：2005-07-21

申请号：PCT/US2004/043089

申请日：2004-12-24

Applicant: INTEL CORPORATION ,  SADOWSKY, John

Inventor： SADOWSKY, John

IPC: H04L25/06

CPC classification number: H04L25/03216 ,  H04L25/03222 ,  H04L25/03229 ,  H04L25/067 ,  H04L27/3488 ,  H04L27/38 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2005055505A3

公开(公告)日：2005-08-11

申请号：PCT/US2004037732

申请日：2004-11-10

Applicant: INTEL CORP ,  JACOBSEN ERIC ,  SADOWSKY JOHN

Inventor： JACOBSEN ERIC ,  SADOWSKY JOHN

IPC: H04L1/00 ,  H04L1/18 ,  H04L27/26

CPC classification number: H04L1/005 ,  H04L1/0041 ,  H04L1/0057 ,  H04L27/2602

Abstract: 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.

Abstract translation: 公开了具有窄解码延迟限制的块编码/解码信息无线网络的方法，设备和系统。 一种方法包括：识别要在分组码中发送的信息的长度，并且将要在分组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的量基于 考虑用于解码最后一个码字的可用解码时间的每个码字，所识别的长度并且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。 在某些实现中，低密度奇偶校验（LDPC）编码可以与OFDM结合使用以在高吞吐量WLAN中提供可靠的通信。

公开(公告)号：WO2005055505A2

公开(公告)日：2005-06-16

申请号：PCT/US2004/037732

申请日：2004-11-10

Applicant: INTEL CORPORATION ,  JACOBSEN, Eric ,  SADOWSKY, John

Inventor： JACOBSEN, Eric ,  SADOWSKY, John

IPC: H04L1/00

CPC classification number: H04L1/005 ,  H04L1/0041 ,  H04L1/0057 ,  H04L27/2602

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2006060780A1

公开(公告)日：2006-06-08

申请号：PCT/US2005/043956

申请日：2005-12-01

Applicant: INTEL CORPORATION ,  SADOWSKY, John ,  MALTSEV, Alexander ,  SERGEYEV, Vadim ,  DAVYDOV, Alexei

Inventor： SADOWSKY, John ,  MALTSEV, Alexander ,  SERGEYEV, Vadim ,  DAVYDOV, Alexei

IPC: H04L27/26

CPC classification number: H04L27/2602 ,  H04L27/2607

Abstract: 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 P802.1 In proposal can use 128 subcarriers in 40 MHz operation to provide increased throughput in lower-bandwidth channel operation.

Abstract translation: 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 P802.1In提案兼容的系统可以在40MHz操作中使用128个子载波，以在较低带宽信道操作中提供增加的吞吐量。

公开(公告)号：WO2006039058A1

公开(公告)日：2006-04-13

申请号：PCT/US2005/031473

申请日：2005-09-01

Applicant: INTEL CORPORATION ,  SADOWSKY, John

Inventor： SADOWSKY, John

IPC: H04B7/06

CPC classification number: H04B7/0634 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0636

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2006012018A1

公开(公告)日：2006-02-02

申请号：PCT/US2005/021162

申请日：2005-06-14

Applicant: INTEL CORPORATION ,  SADOWSKY, John, S. ,  WOODWARD, Ernest, E.

Inventor： SADOWSKY, John, S. ,  WOODWARD, Ernest, E.

IPC: H04L12/28

CPC classification number: H04W88/10 ,  H04W48/18 ,  H04W88/06

Abstract: Methods and systems for communicating in a wireless network include usage based switching between two or more different types of air interfaces. In example implementations, a first air interface for wireless wide area networks (VWUAN) may be used for low bandwidth data transfers and a second interface for wireless local area networks (WLAN) or wireless metropolitan area networks (WMAN) may be used for higher bandwidth data transfers. Various specific embodiments and variations are also disclosed.

Abstract translation: 用于在无线网络中通信的方法和系统包括在两种或多种不同类型的空中接口之间的基于用途的切换。 在示例实现中，用于无线广域网（VWAN）的第一空中接口可用于低带宽数据传输，并且用于无线局域网（WLAN）或无线城域网（WMAN）的第二接口可用于较高带宽 数据传输。 还公开了各种具体实施方案和变体。

公开(公告)号：WO2005099211A1

公开(公告)日：2005-10-20

申请号：PCT/US2005/010175

申请日：2005-03-25

Applicant: INTEL CORPORATION ,  SADOWSKY, John ,  LEVY, Shmuel ,  SANDHU, Sumeet ,  HOLT, Keith

Inventor： SADOWSKY, John ,  LEVY, Shmuel ,  SANDHU, Sumeet ,  HOLT, Keith

IPC: H04L27/26

CPC classification number: H04L27/2634 ,  H04L1/06 ,  H04L27/2602

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2005071910A1

公开(公告)日：2005-08-04

申请号：PCT/US2005/001032

申请日：2005-01-12

Applicant: INTEL CORPORATION ,  MALTSEV, Alexander, A. ,  SADRI, Ali, S. ,  SERGEYEV, Vadim, S. ,  STEPHENS, Adrian, P. ,  SADOWSKY, John, S.

Inventor： MALTSEV, Alexander, A. ,  SADRI, Ali, S. ,  SERGEYEV, Vadim, S. ,  STEPHENS, Adrian, P. ,  SADOWSKY, John, S.

IPC: H04L27/26

CPC classification number: H04L12/56 ,  H04B7/0413 ,  H04L25/0204 ,  H04L27/26

Abstract: A frame structure for communicating over a high-throughput communication channel includes a channelization field as part of a current data unit to indicate a frequency and space configuration of subsequent portions of the current data unit.

Abstract translation: 用于通过高吞吐量通信信道进行通信的帧结构包括作为当前数据单元的一部分的信道化字段，以指示当前数据单元的后续部分的频率和空间配置。

公开(公告)号：WO0229977A3

公开(公告)日：2002-06-13

申请号：PCT/US0130355

申请日：2001-09-26

Applicant: INTEL CORP ,  SADOWSKY JOHN

Inventor： SADOWSKY JOHN

IPC: G06F11/10 ,  G06F9/38 ,  H03M13/25 ,  H03M13/29 ,  H03M13/39 ,  H03M13/41 ,  H04L1/00

CPC classification number: H03M13/3922 ,  H03M13/2957 ,  H03M13/3905 ,  H03M13/3927 ,  H03M13/3961 ,  H03M13/41 ,  H03M13/4107 ,  H03M13/6502 ,  H03M13/6569

Abstract: A system and method for decoding a channel bit stream efficiently performs trellis-based operations. The system includes a butterfly coprocessor and a digital signal processor. For trellis-based encoders, the system decodes a channel bit stream by performing operations in parallel in the butterfly coprocessor, at the direction of the digital signal processor. The operations are used in implementing the MAP algorithm, the Viterbi algorithm, and other soft- or hard-output encoding algorithms. The DSP may perform memory management and algorithmic scheduling on behalf of the butterfly coprocessor. The butterfly coprocessor may perform parallel butterfly operations for increased throughput. The system maintains flexibility, for use in a number of possible decoding environments.

Abstract translation: 用于解码信道比特流的系统和方法有效地执行基于网格的操作。 该系统包括一个蝶形协处理器和一个数字信号处理器。 对于基于网格的编码器，系统通过在蝶形协处理器中并行执行操作，在数字信号处理器的指导下解码通道比特流。 这些操作用于实现MAP算法，维特比算法和其他软或硬输出编码算法。 DSP可以代表蝶形协处理器执行存储器管理和算法调度。 蝶形协处理器可以执行并行蝶形运算以提高吞吐量。 该系统保持灵活性，可用于多种可能的解码环境。