公开(公告)号：US10404515B2

公开(公告)日：2019-09-03

申请号：US15722591

申请日：2017-10-02

Applicant: APPLE INC.

Inventor： Shiquan Wu ,  Wen Tong ,  Leo Strawczynski

IPC: H04W4/00 ,  H04L27/26 ,  H04B7/0417 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04B7/0413 ,  H04L5/00

Abstract: An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria. The criteria includes a calculation of a smallest eigen value of a frequency channel response matrix and a smallest element of a diagonal of the matrix and a ratio of the largest and smallest eigen values of the matrix.

公开(公告)号：US09780987B2

公开(公告)日：2017-10-03

申请号：US15155693

申请日：2016-05-16

Applicant: APPLE INC.

Inventor： Shiquan Wu ,  Wen Tong ,  Leo Strawczynski

IPC: H04W4/00 ,  H04L27/26 ,  H04B7/0417 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04B7/0413 ,  H04L5/00

CPC classification number: H04L27/2646 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0662 ,  H04L1/0675 ,  H04L5/0007 ,  H04L27/2626 ,  H04L27/2628

Abstract: An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria. The criteria includes a calculation of a smallest eigen value of a frequency channel response matrix and a smallest element of a diagonal of the matrix and a ratio of the largest and smallest eigen values of the matrix.

公开(公告)号：US09344316B2

公开(公告)日：2016-05-17

申请号：US14482481

申请日：2014-09-10

Applicant: APPLE INC.

Inventor： Shiquan Wu ,  Wen Tong ,  Leo Strawczynski

IPC: H04J11/00 ,  H04L27/26 ,  H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06

CPC classification number: H04L27/2646 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0662 ,  H04L1/0675 ,  H04L5/0007 ,  H04L27/2626 ,  H04L27/2628

Abstract: An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria. The criteria includes a calculation of a smallest eigen value of a frequency channel response matrix and a smallest element of a diagonal of the matrix and a ratio of the largest and smallest eigen values of the matrix.

公开(公告)号：US08837272B2

公开(公告)日：2014-09-16

申请号：US13678702

申请日：2012-11-16

Applicant: Apple Inc.

Inventor： Shiquan Wu ,  Wen Tong ,  Leo Strawczynski

IPC: H04J11/00

CPC classification number: H04L27/2646 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0662 ,  H04L1/0675 ,  H04L5/0007 ,  H04L27/2626 ,  H04L27/2628

Abstract: An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria. The criteria includes a calculation of a smallest eigen value of a frequency channel response matrix and a smallest element of a diagonal of the matrix and a ratio of the largest and smallest eigen values of the matrix.

Abstract translation: 一种适应性正交频分复用系统（OFDM），其使用多输入多输出（MIMO）来具有根据时间分集发送的OFDM信号以减少信号衰落或者根据空间分集来增加数据速率。 基于阈值与三个标准中的至少一个的比较的结果，将子载波分类为空间分集发送或时间分集发送。 标准包括计算频道响应矩阵的最小本征值和矩阵的对角线的最小元素以及矩阵的最大和最小本征值的比率。

公开(公告)号：US20130142031A1

公开(公告)日：2013-06-06

申请号：US13678702

申请日：2012-11-16

Applicant: Apple Inc.

Inventor： Shiquan Wu ,  Wen Tong ,  Leo Strawczynski

IPC: H04B7/04

CPC classification number: H04L27/2646 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0662 ,  H04L1/0675 ,  H04L5/0007 ,  H04L27/2626 ,  H04L27/2628

Abstract: An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria. The criteria includes a calculation of a smallest eigen value of a frequency channel response matrix and a smallest element of a diagonal of the matrix and a ratio of the largest and smallest eigen values of the matrix.

Abstract translation: 一种适应性正交频分复用系统（OFDM），其使用多输入多输出（MIMO）来具有根据时间分集发送的OFDM信号以减少信号衰落或者根据空间分集来增加数据速率。 基于阈值与三个标准中的至少一个的比较的结果，将子载波分类为空间分集发送或时间分集发送。 标准包括计算频道响应矩阵的最小本征值和矩阵的对角线的最小元素以及矩阵的最大和最小本征值的比率。