公开(公告)号：US20190229787A1

公开(公告)日：2019-07-25

申请号：US16373183

申请日：2019-04-02

Applicant: APPLE INC.

Inventor： Hang Zhang ,  Mo-Han Fong ,  Peiying Zhu ,  Jianglei Ma ,  Wen Tong

IPC: H04B7/0456 ,  H04L5/02 ,  H04B7/06 ,  H04L5/00 ,  H04B7/0413 ,  H04W74/06 ,  H04W72/08 ,  H04W72/04 ,  H04W48/08

CPC classification number: H04B7/0478 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0671 ,  H04B7/0673 ,  H04B7/0691 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/005 ,  H04L5/006 ,  H04L5/023 ,  H04L27/2601 ,  H04W48/08 ,  H04W72/042 ,  H04W72/044 ,  H04W72/08 ,  H04W74/06

Abstract: Aspects of the present invention provide additional MAC functionality to support the PHY features of a wireless communication system framework. The additional MAC functionality aids in enabling feedback from wireless terminals to base stations. In some aspects of the invention the feedback is provided on an allocated feedback channel. In other aspects of the invention the feedback is provided by MAC protocol data units (PDU) in a header, mini-header, or subheader. The feedback may be transmitted from the wireless terminal to the base station autonomously by the wireless terminal or in response to an indication from the base station that feedback is requested. Aspects of the invention also provide for allocating feedback resources to form a dedicated feedback channel. One or more of these enhancements is included in a given implementation. Base stations and wireless terminals are also described upon which methods described herein can be implemented.

公开(公告)号：US10340990B2

公开(公告)日：2019-07-02

申请号：US16049080

申请日：2018-07-30

Applicant: Apple Inc.

Inventor： Wen Tong ,  Hosein Nikopour ,  Amir Khandani ,  Hua Xu ,  Ming Jia ,  Peiying Zhu ,  Dong-sheng Yu

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/0417 ,  H04B7/06 ,  H04L29/06

Abstract: A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords ci, where i is a unique codeword index for each codeword ci. Each codeword defines weighting factors to apply to the MIMO signals, and may correspond to channel matrices or vectors to apply to the MIMO signals prior to transmission from the respective antennas of the MIMO transmitter. The present invention creates codeword subsets Si for each codeword ci of the codebook C. Each codeword subset Si defines L codewords cj, which are selected from all the codewords ci in the codebook C. The codewords cj in a codeword subset Si are the L codewords in the entire codebook that best correlate with the corresponding codeword ci.

公开(公告)号：US10237794B2

公开(公告)日：2019-03-19

申请号：US15355440

申请日：2016-11-18

Applicant: Apple Inc.

Inventor： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

IPC: H04W36/08 ,  H04B7/0413 ,  H04L27/26

Abstract: A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.

公开(公告)号：US20180316455A1

公开(公告)日：2018-11-01

申请号：US16031047

申请日：2018-07-10

Applicant: Apple Inc.

Inventor： Jianglei Ma ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Hua Xu ,  Hang Zhang ,  Mo-Han Fong

IPC: H04J13/00 ,  H04L25/02 ,  H04L5/00 ,  H04B7/0404 ,  H04L27/26 ,  H04B1/707

CPC classification number: H04J13/0003 ,  H04B1/707 ,  H04B7/0404 ,  H04B7/0678 ,  H04J13/00 ,  H04J13/16 ,  H04L5/0016 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/005 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0232 ,  H04L25/03866 ,  H04L27/2613 ,  H04L27/2627 ,  H04W72/044

Abstract: In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions.

公开(公告)号：US10075939B2

公开(公告)日：2018-09-11

申请号：US14494695

申请日：2014-09-24

Applicant: Apple Inc.

Inventor： Hang Zhang ,  Jianglei Ma ,  Ming Jia ,  Mo-Han Fong ,  Peiying Zhu ,  Wen Tong

IPC: H04W72/00 ,  H04W72/04 ,  H04L12/18 ,  H04W4/08 ,  H04W48/10 ,  H04B7/0413 ,  H04L1/18 ,  H04L27/26 ,  H04L29/12 ,  H04W74/00 ,  H04L5/02

CPC classification number: H04W72/0406 ,  H04B7/0413 ,  H04L1/1887 ,  H04L5/023 ,  H04L12/185 ,  H04L27/2627 ,  H04L61/2069 ,  H04W4/08 ,  H04W48/10 ,  H04W72/005 ,  H04W72/04 ,  H04W74/004 ,  H04W74/006 ,  Y02D30/30

Abstract: A method and system for allocating shareable wireless transmission resources. A resource pool is established. The resource pool is divided into a plurality of physical layer allocation units usable for wirelessly transmitting control information and traffic data. The allocation units are assigned at the media access control layer for the wireless transmission of the control information and traffic data. The system and method of the present invention also allows mobile stations to be dynamically grouped into multicast groupings to reduce system overhead resource requirements.

公开(公告)号：US10038485B2

公开(公告)日：2018-07-31

申请号：US15852585

申请日：2017-12-22

Applicant: Apple Inc.

Inventor： Wen Tong ,  Hosein Nikopour ,  Amir Khandani ,  Hua Xu ,  Ming Jia ,  Peiying Zhu ,  Dong-sheng Yu

IPC: H04B7/04 ,  H04B7/0456 ,  H04L29/06 ,  H04B7/06 ,  H04B7/0417

CPC classification number: H04B7/0478 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/0634 ,  H04B7/0639 ,  H04L69/04 ,  H04L69/14

Abstract: A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords ci, where i is a unique codeword index for each codeword ci. Each codeword defines weighting factors to apply to the MIMO signals, and may correspond to channel matrices or vectors to apply to the MIMO signals prior to transmission from the respective antennas of the MIMO transmitter. The present invention creates codeword subsets Si for each codeword ci of the codebook C. Each codeword subset Si defines L codewords cj, which are selected from all the codewords ci in the codebook C. The codewords cj in a codeword subset Si are the L codewords in the entire codebook that best correlate with the corresponding codeword ci.

公开(公告)号：US09923617B2

公开(公告)日：2018-03-20

申请号：US14257949

申请日：2014-04-21

Applicant: Apple Inc.

Inventor： Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Alexandre M. Chloma ,  Mikhail G. Bakouline ,  Vitali B. Kreindeline

IPC: H04B7/04 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/06 ,  H04L1/06 ,  H04L25/02 ,  H04L25/03

CPC classification number: H04B7/0482 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0626 ,  H04L1/0656 ,  H04L25/0248 ,  H04L25/03343 ,  H04L2025/03426

Abstract: Systems and methods of optimizing communication channels in multi-user communication systems are provided. Coding weights are determined based on communication channel state information for communication channels between a transmitter and multiple receivers. The coding weights are applied to communication signals to be transmitted from the transmitter to the receivers. Each receiver decodes received signals using inverses of the coding weights. Embodiments of the invention support multi-user MIMO (Multiple Input Multiple Output) where each receiver has fewer antennas than the transmitter, and enhance system performance if the total number of antennas at all of the receivers exceeds the number of antennas at the transmitter.

公开(公告)号：US20180041367A1

公开(公告)日：2018-02-08

申请号：US15674785

申请日：2017-08-11

Applicant: APPLE INC.

Inventor： Jianglei MA ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Claude Royer

IPC: H04L27/26 ,  H04B7/06

CPC classification number: H04L27/261 ,  H04B7/06 ,  H04B7/0615 ,  H04B7/0684 ,  H04L5/0026 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0234

Abstract: Pilot, preamble and midamble patterns are provided that are particularly suited for four transmit antenna OFDM systems. Pilots are inserted in a scattered manner for each of the four antennas, either uncoded, space-time coded in pairs, space-time frequency coded in pairs, or space-time-frequency coded.

公开(公告)号：US20180020489A1

公开(公告)日：2018-01-18

申请号：US15664431

申请日：2017-07-31

Applicant: Apple Inc.

Inventor： Jianglei Ma ,  Hua Xu ,  Ming Jia ,  Sarah Boumendil ,  Evelyne Le Strat ,  Hang Zhang ,  Peiying Zhu ,  Wen Tong

IPC: H04W74/08 ,  H04L1/06 ,  H04L5/02 ,  H04W74/00 ,  H04L27/26

CPC classification number: H04W74/0891 ,  H04L1/06 ,  H04L1/0618 ,  H04L5/023 ,  H04L27/2627 ,  H04L27/2657 ,  H04L27/2662 ,  H04W74/006 ,  H04W74/0866

Abstract: Physical layer structures and access schemes for use in such networks are described and in particular initial access channel (IACH) structures are proposed. A spectrum efficient downlink (DL) IACH design supports different types of User Equipment (UE) capabilities and different system bandwidths. An IACH includes the synchronization channel (SCH) and broadcast-control channel (BCH). A non-uniform SCH for all system bandwidths is provided, as well as scalable bandwidth BCH depending on system bandwidth. An initial access procedure is provided, as well as an access procedure.

公开(公告)号：US20170366239A1

公开(公告)日：2017-12-21

申请号：US15691877

申请日：2017-08-31

Applicant: Apple Inc.

Inventor： Jianglei Ma ,  Ming Jia ,  Hua Xu ,  Wen Tong ,  Peiying Zhu ,  Moussa Abdi

IPC: H04B7/0452 ,  H04B7/0413 ,  H04W72/04 ,  H04J13/18 ,  H04L5/00 ,  H04W88/08 ,  H04L27/26 ,  H04L25/02 ,  H04J13/16 ,  H04L1/06

CPC classification number: H04B7/0452 ,  H04B7/0413 ,  H04J13/18 ,  H04J2013/165 ,  H04L1/0625 ,  H04L5/001 ,  H04L5/0026 ,  H04L5/0032 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L25/0226 ,  H04L25/0228 ,  H04L27/2613 ,  H04W72/04 ,  H04W72/044 ,  H04W88/08

Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.