公开(公告)号：US20170195023A1

公开(公告)日：2017-07-06

申请号：US15461702

申请日：2017-03-17

Applicant: Sun Patent Trust

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04B7/04 ,  H04B1/713

CPC classification number: H04B7/0465 ,  H04B1/713 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0615 ,  H04L1/0009 ,  H04L1/005 ,  H04L1/0643 ,  H04L1/20

Abstract: Disclosed is a precoding method comprising the steps of: generating a first coded block and a second coded block with use of a predetermined error correction block coding scheme; generating a first precoded signal z1 and a second precoded signal z2 by performing a precoding process, which corresponds to a matrix selected from among the N matrices F[i], on a first baseband signal s1 generated from the first coded block and a second baseband signal s2 generated from the second coded block, respectively; the first precoded signal z1 and the second precoded signal z2 satisfying (z1, z2)T=F[i] (s1, s2)T; and changing both of or one of a power of the first precoded signal z1 and a power of the second precoded signal z2, such that an average power of the first precoded signal z1 is less than an average power of the second precoded signal z2.

公开(公告)号：US20170163383A1

公开(公告)日：2017-06-08

申请号：US15434283

申请日：2017-02-16

Applicant: InterDigital Technology Corporation

Inventor： Robert L. Olesen ,  Eldad M. Zeira ,  Peter J. Voltz ,  Yongwen E. Yang ,  Qingyuan Dai ,  Chang-Soo Koo ,  I-Tai Lu ,  KunJu Tsai

IPC: H04L1/06 ,  H04B7/0456 ,  H04B17/336 ,  H04B7/06

CPC classification number: H04L1/0643 ,  H04B7/0456 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0837 ,  H04B7/0891 ,  H04B17/336 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0631 ,  H04L27/2626 ,  H04L27/2647 ,  H04W84/12

Abstract: A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.

公开(公告)号：US20170126301A1

公开(公告)日：2017-05-04

申请号：US15357552

申请日：2016-11-21

Applicant: APPLE INC.

Inventor： Mahmoud Taherzadehboroujeni ,  Hosein Nikopour ,  Amir Khandani ,  Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Dong-Sheng Yu ,  Jianglei Ma

IPC: H04B7/06 ,  H04B7/0413

CPC classification number: H04B7/0669 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/0697 ,  H04B7/0891 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0643 ,  H04L1/0668 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L27/2626

Abstract: Methods and devices are provided for MIMO OFDM transmitter and receivers having odd and/even numbers of transmit antennas. Various methods for pre-coding information bits before space time coding (STC) are described for enabling transmission of information bits over all antennas. Methods of decoding received signals that have been pre-coded and STC coded are also provided by embodiments of the invention. Pilot patterns for downlink and uplink transmission between a base station and one or more wireless terminals for three transmit antenna transmitters are also provided. Variable rate codes are provided that combine various fixed rate codes in a manner that results in codes whose rates are dependent on all the various fixed rate codes that are combined

公开(公告)号：US20170104516A1

公开(公告)日：2017-04-13

申请号：US15272740

申请日：2016-09-22

Applicant: INTEL CORPORATION

Inventor： Alexander Alexandrovich Maltsev ,  Andrey Pudeyev ,  Alexei Vladimirovich Davydov ,  Ali S. Sadri ,  Carlos Cordeiro

IPC: H04B7/04 ,  H04L1/06 ,  H04B7/06

CPC classification number: H04B7/0413 ,  H04B7/0617 ,  H04B7/0669 ,  H04B7/068 ,  H04B7/0689 ,  H04B7/0691 ,  H04L1/0606 ,  H04L1/0643 ,  H04L1/0668

Abstract: Some demonstrative embodiments include devices, systems and/or methods of beamformed communication with space block coding. For example, an apparatus may include a controller to control a plurality of antenna subarrays to form a plurality of directional beams directed in a plurality of different directions for communicating a multi-input-multi-output (MIMO) wireless transmission, which is encoded according to a space-block coding scheme.

公开(公告)号：US09544035B2

公开(公告)日：2017-01-10

申请号：US15207744

申请日：2016-07-12

Applicant: Sun Patent Trust

Inventor： Yutaka Murakami ,  Tomohiro Kimura ,  Mikihiro Ouchi

IPC: H04B7/04 ,  H04L5/00 ,  H04L27/26 ,  H04L1/00 ,  H04L1/06

CPC classification number: H04L27/265 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/046 ,  H04B7/0473 ,  H04B7/0617 ,  H04B7/0697 ,  H04B7/08 ,  H04B7/086 ,  H04B7/12 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0045 ,  H04L1/0047 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/06 ,  H04L1/0643 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0226 ,  H04L25/0248 ,  H04L25/03942 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/3405 ,  H04L2001/0093

Abstract: Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

Abstract translation: 在用于从多个天线同时发送多个调制信号的传输方法中直接主导的环境中，传输质量得到改善。 在调制信号的数据传输中使用的所有数据符号通过预编码矩阵之间的跳变进行预编码，使得用于预编码每个数据符号的预编码矩阵和用于预编码与频域中的数据符号相邻的数据符号的预编码矩阵，以及 时域完全不同 发送其中布置有这样的数据符号的调制信号。

公开(公告)号：US20160309344A1

公开(公告)日：2016-10-20

申请号：US15097784

申请日：2016-04-13

Applicant: Hossein KHOSHNEVIS ,  Ian MARSLAND ,  Halim YANIKOMEROGLU ,  Ngoc Dung DAO ,  Nimal Gamini SENARATH

Inventor： Hossein KHOSHNEVIS ,  Ian MARSLAND ,  Halim YANIKOMEROGLU ,  Ngoc Dung DAO ,  Nimal Gamini SENARATH

IPC: H04W24/02 ,  H04L1/00 ,  H04L5/00 ,  H04B7/04 ,  H04W72/12

CPC classification number: H04W24/02 ,  H04B7/04 ,  H04B7/0417 ,  H04L1/004 ,  H04L1/0058 ,  H04L1/0643 ,  H04L1/0668 ,  H04L5/005 ,  H04W72/1226

Abstract: Space-time block codes (STBCs) is a known approach for using multiple transmit antennas to provide higher data rates and better reliability by exploiting spatial diversity. Existing STBCs use independent two-dimensional constellations. Methods and systems for using multidimensional constellations to improve the performance of orthogonal STBCs are disclosed. Methods for finding optimized multidimensional constellations for orthogonal STBCs are also disclosed.

Abstract translation: 空时块码（STBC）是已知的使用多个发射天线通过利用空间分集来提供更高数据速率和更好的可靠性的方法。 现有的STBC使用独立的二维星座。 公开了使用多维星座来提高正交STBC的性能的方法和系统。 还公开了用于寻找正交STBC的优化多维星座的方法。

公开(公告)号：US09461860B2

公开(公告)日：2016-10-04

申请号：US14536341

申请日：2014-11-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaolei Tie ,  Xueli Ma ,  Meng Hua ,  Shuju Fan

IPC: H04L27/26 ,  H04B7/04 ,  H04B7/06 ,  H04L25/02 ,  H04B1/04 ,  H04L5/00

CPC classification number: H04L27/2626 ,  H04B1/0483 ,  H04B7/0413 ,  H04B7/0667 ,  H04B7/0684 ,  H04L1/0643 ,  H04L5/0025 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  Y02D70/1242 ,  Y02D70/444

Abstract: Embodiments of the present invention disclose a pilot signal transmitting method, and a channel estimation method, an apparatus, and a system. The method includes: within a transmission time interval (TTI), transmitting a first pilot signal (CPICH1) on a first antenna, and transmitting a second pilot signal (CPICH2) on a second antenna; when no first-type terminal is scheduled within coverage of a MIMO system within the TTI, transmitting a third pilot signal (CPICH3) on a third antenna, and transmitting a fourth pilot signal (CPICH4) on a fourth antenna; and when a first-type terminal is scheduled within the coverage of the MIMO system within the TTI, transmitting the CPICH3 and a fifth pilot signal (CPICH5) on the third antenna, and transmitting the CPICH4 and a sixth pilot signal (CPICH6) on the fourth antenna. By using the method, interference of a pilot signal to a legacy terminal can be greatly reduced.

Abstract translation: 本发明的实施例公开了一种导频信号发送方法，信道估计方法，装置和系统。 该方法包括：在传输时间间隔（TTI）内传输第一天线上的第一导频信号（CPICH1），并在第二天线上发送第二导频信号（CPICH2）; 当在TTI内的MIMO系统的覆盖范围内没有调度第一类型终端时，在第三天线上发送第三导频信号（CPICH3），并在第四天线上发送第四导频信号（CPICH4）; 并且当在TTI内的MIMO系统的覆盖范围内调度第一类型终端时，在第三天线上发送CPICH3和第五导频信号（CPICH5），并且在第三天线上发送CPICH4和第六导频信号（CPICH6） 第四天线。 通过使用该方法，可以大大减少导频信号对传统终端的干扰。

公开(公告)号：US20160248490A1

公开(公告)日：2016-08-25

申请号：US15143664

申请日：2016-05-02

Applicant: Sun Patent Trust

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04B7/04 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0413 ,  H04B7/0615 ,  H04J11/0033 ,  H04L1/0003 ,  H04L1/0071 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0643 ,  H04L5/0007 ,  H04L25/03343 ,  H04L25/03891 ,  H04L27/2602 ,  H04L27/2647 ,  H04L27/3444 ,  H04L27/368

Abstract: Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal over the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a baseband signal after a first mapping and a baseband signal after a second mapping by a precoding weight and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.

公开(公告)号：US09397794B2

公开(公告)日：2016-07-19

申请号：US14321117

申请日：2014-07-01

Applicant: Inventergy, Inc.

Inventor： Choo Eng Yap ,  Lee Ying Loh

IPC: H04L1/18 ,  H03M13/00 ,  H04L1/06 ,  H04B7/04 ,  H04L1/08 ,  H03M13/09 ,  H03M13/23 ,  H03M13/29 ,  H04L1/00

CPC classification number: H04L1/1819 ,  H03M13/09 ,  H03M13/23 ,  H03M13/2957 ,  H03M13/6306 ,  H04B7/0413 ,  H04L1/0001 ,  H04L1/0625 ,  H04L1/0643 ,  H04L1/0656 ,  H04L1/08 ,  H04L1/1822 ,  H04L1/1825 ,  H04L1/1887

Abstract: Automatic retransmission in communications systems. An embodiment includes retransmitting data. A cyclic redundancy check (CRC) is executed on a portion of data received as part of a data stream at a receiver antenna. Feedback information of acknowledgment (ACK) or negative acknowledgement (NACK) for the portion of data is determined based on a result of the CRC. It is identified that the portion of data is to be retransmitted based on the feedback information indicating a NACK with respect to the portion of data. A retransmission mode is selected for the portion of data based on desired characteristics of the data stream, including a first mode that retransmits the portion of data on at least a first transmitter antenna while transmitting new data on at least a second transmitter antenna; and a second mode that retransmits the portion of data simultaneously on at least the first and second transmitter antennas.

Abstract translation: 通信系统中的自动重传。 一个实施例包括重传数据。 在作为接收机天线的数据流的一部分接收的数据的一部分上执行循环冗余校验（CRC）。 基于CRC的结果确定数据部分的确认（ACK）或否定确认（NACK）的反馈信息。 基于指示关于数据部分的NACK的反馈信息，识别出要重发数据的部分。 基于数据流的期望特性为数据的部分选择重传模式，包括在至少第二发射机天线上传输新数据的同时在至少第一发射机天线上重发数据的第一模式; 以及第二模式，其在至少所述第一和第二发射机天线上同时重传所述部分数据。

公开(公告)号：US09363037B2

公开(公告)日：2016-06-07

申请号：US14741001

申请日：2015-06-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yunbo Li ,  Xun Yang ,  Yi Luo

IPC: H04L1/02 ,  H04L1/00 ,  H04L1/06 ,  H04B7/04

CPC classification number: H04L1/0009 ,  H04B7/0417 ,  H04L1/0003 ,  H04L1/0025 ,  H04L1/0028 ,  H04L1/0643 ,  H04L1/0681

Abstract: Embodiments of the present disclosure provide a link adaptation feedback method, including: receiving, by a device, a link adaptation feedback frame sent by a communication peer end, where the link adaptation feedback frame includes a modulation and coding scheme request sequence identifier (MSI), where the MSI is configured to indicate space-time block coding type information.

Abstract translation: 本公开的实施例提供一种链路自适应反馈方法，包括：由设备接收由通信对端发送的链路自适应反馈帧，其中链路自适应反馈帧包括调制和编码方案请求序列标识符（MSI） ，其中MSI被配置为指示空时块编码类型信息。