-
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.
-
102.发明授权公开(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
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
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.
-
Patent Agency Ranking
公开(公告)号：US09742606B2
公开(公告)日：2017-08-22
申请号：US14672529
申请日：2015-03-30
Applicant: APPLE INC.
Inventor： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Claude Royer
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：US20170222702A1
公开(公告)日：2017-08-03
申请号：US15486060
申请日：2017-04-12
Applicant: APPLE INC.
Inventor： Wen Tong , Ming Jia , Jianglei Ma , Peiying Zhu , Hua Xu , Dong-Sheng Yu , Hang Zhang , Mo-Han Fong
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: Systems and methods for closed loop MIMO (multiple input and multiple output) wireless communication are provided. Various transmit formats including spatial multiplexing and STTD are defined in which vector or matrix weighting is employed using information fed back from receivers. The feedback information may include channel matrix or SVD-based feedback.
-
108.发明授权公开(公告)号：US09705725B2
公开(公告)日：2017-07-11
申请号：US14978546
申请日：2015-12-22
Applicant: APPLE INC.
Inventor： Shiquan Wu , Wen Tong , Claude Royer , Peiying Zhu
CPC classification number: H04L27/265 , H04J11/0023 , H04L27/2605 , H04L27/2626 , H04L27/2691 , H04L27/2695
Abstract: Systems and methods for transmitting and receiving OFDM symbols are provided which enable the otherwise wasted transmission time normally used as a prefix for each OFDM symbol to contain useful information. At the receiver, the received signal is processed to convert received OFDM symbols from a linear convolution with the channel to a cyclic convolution.
-
公开(公告)号：US09629061B2
公开(公告)日：2017-04-18
申请号：US15149739
申请日：2016-05-09
Applicant: Apple Inc.
Inventor： Hang Zhang , Peiying Zhu , Wen Tong , Nimal Gamini Senarath , Derek Yu , David G. Steer
IPC: H04W4/00 , H04L12/28 , G01R31/08 , H04W40/12 , H04B7/26 , H04L12/46 , H04W28/18 , H04W76/02 , H04W28/24 , H04L29/06 , H04W72/04 , H04W16/26 , H04W84/04 , H04W84/12
CPC classification number: H04W40/12 , H04B7/2606 , H04L12/4633 , H04L47/24 , H04L47/28 , H04L69/22 , H04W16/26 , H04W28/18 , H04W28/24 , H04W40/22 , H04W72/0413 , H04W72/042 , H04W76/12 , H04W84/047 , H04W84/12
Abstract: A wireless communication access path exists between an ingress station and an egress station. A logical communication tunnel is established between the ingress and egress stations directly or through any number of intermediate relay stations to handle session flows of PDUs. As PDUs arrive, the ingress station may determine and add information bearing on an identified QoS associated with the PDU to the PDUs before they are delivered to the downstream egress station(s) or intermediate relay station(s). The information may be used by the downstream stations to schedule the PDUs for further delivery. The information may also be used by the egress station to schedule the PDUs for delivery.
-
公开(公告)号：US09628153B2
公开(公告)日：2017-04-18
申请号：US15000542
申请日：2016-01-19
Applicant: APPLE INC.
Inventor： Wen Tong , Ming Jia , Jianglei Ma , Peiying Zhu , Hua Xu , Dong-Sheng Yu , Hang Zhang , Mo-Han Fong
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: Systems and methods for closed loop MIMO (multiple input and multiple output) wireless communication are provided. Various transmit formats including spatial multiplexing and STTD are defined in which vector or matrix weighting is employed using information fed back from receivers. The feedback information may include channel matrix or SVD-based feedback.
-
-
-
-
-
-
-
-
-
Search Results
239
records
(took 0.033 seconds)
