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    SPACE DIVISION MULTIPLE ACCESS CHANNELIZATION IN WIRELESS COMMUNICATION SYSTEMS
    31.
    发明申请
    SPACE DIVISION MULTIPLE ACCESS CHANNELIZATION IN WIRELESS COMMUNICATION SYSTEMS 审中-公开
    无线通信系统中的空间划分多址通信

    公开(公告)号：WO2008045980A2

    公开(公告)日：2008-04-17

    申请号：PCT/US2007/081013

    申请日：2007-10-10

    Applicant: QUALCOMM Incorporated ,  GOROKHOV, Alexei ,  KADOUS, Tamer

    Inventor： GOROKHOV, Alexei ,  KADOUS, Tamer

    IPC: H04W16/28 ,  H04W72/04 ,  H04W72/12

    CPC classification number: H04B7/0697 ,  H04L1/1685 ,  H04L2001/0093 ,  H04W16/28 ,  H04W72/12

    Abstract: Space division multiple access channelization is provided that includes scheduling transmission for two or more terminals and utilizing different code offsets that correspond to different sub-trees. The transmissions can be scheduled on overlapping frequency resources for overlapping time periods on different spatial resources. The pilot code offsets provide different pilot signatures so that the pilot transmissions do not overlap. The overlapping frequency resources can partially overlap or completely overlap.

    Abstract translation: 提供空分多址信道化，其包括调度两个或更多个终端的传输并利用对应于不同子树的不同码偏移。 可以在重叠的频率资源上针对不同空间资源上的重叠时间段来调度传输。 导频码偏移提供不同的导频签名，以便导频传输不重叠。 重叠的频率资源可能部分重叠或完全重叠。

    CQI AND RANK PREDICTION FOR LIST SPHERE DECODING AND ML MIMO RECEIVERS
    35.
    发明申请
    CQI AND RANK PREDICTION FOR LIST SPHERE DECODING AND ML MIMO RECEIVERS 审中-公开
    用于列表空间解码和ML MIMO接收机的CQI和RANK预测

    公开(公告)号：WO2006130866A2

    公开(公告)日：2006-12-07

    申请号：PCT/US2006/021583

    申请日：2006-06-01

    Applicant: QUALCOMM INCORPORATED ,  SAMPATH, Hemanth ,  KADOUS, Tamer

    Inventor： SAMPATH, Hemanth ,  KADOUS, Tamer

    CPC classification number: H04B7/12 ,  H04B1/1027 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/0656 ,  H04L1/0675 ,  H04L25/03242 ,  H04L2025/03426

    Abstract: Systems and methodologies are described that facilitate integrating a list-sphere decoding design in a multiple input-multiple output (MIMO wireless communication environment. According to various aspects, optimal rank selection and CQI computation for an optimal rank can be performed in conjunction with a non-linear receiver, such as a maximum life (ML) MMSE receiver, a non-linear receiver with a list-sphere decoder, and the like. Optimal rank selection can be performed using a maximum rank selection protocol, a channel capacity-based protocol, or any other suitable protocol that facilitates rank selection, and CQI information can be generated based in part on effective SNRs determined with regard to a selected optimal rank.

    Abstract translation: 描述了有助于将多个输入多输出（MIMO无线通信环境）中的列表球体解码设计进行集成的系统和方法，根据各个方面，最佳秩选择和最佳秩的CQI计算可以结合非 - 线性接收机，例如最大寿命（ML）MMSE接收机，具有列表球体解码器的非线性接收机等。最佳秩选择可以使用最大秩选择协议，基于信道容量的协议 或有助于等级选择的任何其它合适的协议，并且可以部分地基于针对所选择的最优等级确定的有效SNR来生成CQI信息。

    MITIGATING ACK/NACK ERRORS IN MIMO/SIC/HARQ
    37.
    发明申请
    MITIGATING ACK/NACK ERRORS IN MIMO/SIC/HARQ 审中-公开
    在MIMO / SIC / HARQ中减轻ACK / NACK错误

    公开(公告)号：WO2006023192A2

    公开(公告)日：2006-03-02

    申请号：PCT/US2005/025855

    申请日：2005-07-20

    Applicant: QUALCOMM INCORPORATED ,  KADOUS, Tamer

    Inventor： KADOUS, Tamer

    IPC: H04L1/18

    CPC classification number: H04L1/1829 ,  H04L1/1635 ,  H04L2001/125

    Abstract: Systems and methodologies are described that facilitate mitigating effects of mismatch errors related to incorrectly decoded acknowledgments indicative of successfully decoded data packets in a wireless network environment. Misinterpretation of a cumulative acknowledgment related to a number of successfully decoded data packets can be identified, and data packet transmission mismatch errors caused thereby can be evaluated to determine an optimal manner in which to decode and acknowledge remaining data packets to alleviate mismatch and restore synchronization between a transmitter of the data packets and a receiver thereof.

    Abstract translation: 描述了系统和方法，其有助于减轻与在无线网络环境中指示成功解码的数据分组的错误解码的确认有关的失配错误的影响。 可以识别与多个成功解码的数据分组相关的累积确认的误解，并且可以评估由此引起的数据分组传输失配错误，以确定解码和确认剩余数据分组以减轻失配并最终恢复之间的同步的最佳方式 数据分组的发射机及其接收机。

    CHANNEL ESTIMATION FOR AN OFDM COMMUNICATION SYSTEM WITH INACTIVE SUBBANDS
    38.
    发明申请
    CHANNEL ESTIMATION FOR AN OFDM COMMUNICATION SYSTEM WITH INACTIVE SUBBANDS 审中-公开
    具有无源子带的OFDM通信系统的信道估计

    公开(公告)号：WO2005064870A2

    公开(公告)日：2005-07-14

    申请号：PCT/US2004/043029

    申请日：2004-12-20

    Applicant: QUALCOMM INCORPORATED ,  MANTRAVADI, Ashok ,  KHANDEKAR, Aamod ,  TEAGUE, Edward Harrison ,  KADOUS, Tamer

    Inventor： MANTRAVADI, Ashok ,  KHANDEKAR, Aamod ,  TEAGUE, Edward Harrison ,  KADOUS, Tamer

    IPC: H04L25/02

    CPC classification number: H04L25/022 ,  H04L25/0218 ,  H04L25/0232

    Abstract: For channel estimation in a spectrally shaped wireless communication system, an initial frequency response estimate is obtained for a first set of P uniformly spaced subbands (1) based on pilot symbols received on a second set of subbands used for pilot transmission and (2) using extrapolation and/or interpolation, where P is a power of two. A channel impulse response estimate is obtained by performing a P-point IFFT on the initial frequency response estimate. A final frequency response estimate for N total subbands is derived by (1) setting low quality taps for the channel impulse response estimate to zero, (2) zero-padding the channel impulse response estimate to length N, and (3) performing an N-point FFT on the zero-padded channel impulse response estimate. The channel frequency/impulse response estimate may be filtered to obtain a higher quality channel estimate.

    Abstract translation: 对于频谱形状的无线通信系统中的信道估计，基于在所使用的第二组子带上接收到的导频符号，针对第一组P个均匀间隔的子带（1）获得初始频率响应估计 对于导频传输和（2）使用外推和/或插值，其中P是2的幂。 通过对初始频率响应估计执行P点IFFT来获得信道脉冲响应估计。 通过（1）将用于信道冲击响应估计的低质量抽头设置为零，（2）将信道冲击响应估计零填充到长度N，以及（3）执行N个子带的最终频率响应估计 零填充信道脉冲响应估计的点FFT。 信道频率/脉冲响应估计可以被过滤以获得更高质量的信道估计。

    INCREMENTAL REDUNDANCY TRANSMISSION FOR MULTIPLE PARALLEL CHANNELS IN A MIMO COMMUNICATION SYSTEM
    39.
    发明申请
    INCREMENTAL REDUNDANCY TRANSMISSION FOR MULTIPLE PARALLEL CHANNELS IN A MIMO COMMUNICATION SYSTEM 审中-公开

    公开(公告)号：WO2005027355A3

    公开(公告)日：2005-03-24

    申请号：PCT/US2004/026491

    申请日：2004-08-13

    Applicant: QUALCOMM INCORPORATED ,  KADOUS, Tamer

    Inventor： KADOUS, Tamer

    IPC: H04L12/56

    Abstract: For incremental redundancy transmission on multiple parallel channels in a MIMO system, a transmitter processes (e.g., encodes, partitions, interleaves, and modulates) each data packet for each parallel channel based on a rate selected for the parallel channel and obtains multiple symbol blocks for the packet. For each data packet, the transmitter transmits one symbol block at a time on its parallel channel until a receiver recovers the packet or all blocks have been transmitted. The receiver performs detection and obtains symbol blocks transmitted on the parallel channels. The receiver recovers the data packets transmitted on the parallel channels independently or in a designated order. The receiver processes (e.g., demodulates, deinterleaves, re-assembles, and decodes) all symbol blocks obtained for each data packet and provides a decoded packet. The receiver may estimate and cancel interference due to recovered data packets so that data packets recovered later can achieve higher SINRs.

    REDUCED COMPLEXITY CHANNEL ESTIMATION FOR WIRELESS COMMUNICATION SYSTEMS
    40.
    发明申请
    REDUCED COMPLEXITY CHANNEL ESTIMATION FOR WIRELESS COMMUNICATION SYSTEMS 审中-公开
    降低无线通信系统的复杂通道估计

    公开(公告)号：WO2004047311A2

    公开(公告)日：2004-06-03

    申请号：PCT/US2003/036232

    申请日：2003-11-12

    Applicant: QUALCOMM INCORPORATED

    Inventor： SUBRAMANIAM, Anand ,  KADOUS, Tamer

    IPC: H04B

    CPC classification number: H04L25/0242 ,  H04L25/0208 ,  H04L27/2601

    Abstract: Techniques to derive a channel estimate using substantially fewer number of complex multiplications than with a brute-force method to derive the same channel estimate. In one method, an intermediate vector B is initially derived based on K sub-vectors of a vector Ĥ for a channel frequency response estimate and at least two DFT sub-matrices for a DFT matrix W , where K > 1. An intermediate matrix for A the DFT matrix W is also obtained. A least square channel impulse response estimate is then derived based on the intermediate vector B and the intermediate matrix A . In one implementation, the intermediate vector B is obtained by first computing DFTs of a matrix Ĥ TXL , which is formed based on the vector Ĥ , to provide a matrix G LXL . Inner products between the columns of a base DFT sub-matrix W 1 and the rows of the matrix G LXL are then computed to obtain the entries of the intermediate vector B .

    Abstract translation: 使用大量更少数量的复数乘法来获得信道估计的技术，而不是用蛮力方法来导出相同的信道估计。 在一种方法中，基于用于信道频率响应估计的向量H的K个子向量和用于DFT矩阵W的至少两个DFT子矩阵，其中K> 1，最初导出中间向量B。 还得到DFT矩阵W. 然后基于中间向量B和中间矩阵A导出最小二乘通道脉冲响应估计。 在一个实现中，通过首先计算基于向量H形成的矩阵HTXL的DFT来获得中间向量B，以提供矩阵GLXL。 然后计算基本DFT子矩阵W1的列与矩阵GLXL的行之间的内积，以获得中间向量B的条目。

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