公开(公告)号：US20180097677A1

公开(公告)日：2018-04-05

申请号：US15616277

申请日：2017-06-07

Applicant: MEDIATEK INC.

Inventor： Jiann-Ching Guey ,  Chun-Hsuan Kuo ,  Chao-Cheng Su

IPC: H04L27/26 ,  H04L12/26 ,  H04L27/18

CPC classification number: H04L27/18 ,  H04L5/005 ,  H04L25/0226 ,  H04L27/261 ,  H04L27/2615

Abstract: Aspects of the disclosure provide an apparatus that includes a baseband processing circuit and a transmitting circuit. The baseband processing circuit is configured to encode a reference signal based on a specific sequence to generate a digital stream. The specific sequence has non-zero values at selected positions, and the number of coincidences of non-zero value positions between the specific sequence and a shifted copy of the specific sequence is smaller than a threshold. The transmitting circuit is configured to transmit wireless signals in response to the digital stream.

公开(公告)号：US20170332249A1

公开(公告)日：2017-11-16

申请号：US15589052

申请日：2017-05-08

Applicant: MEDIATEK INC.

Inventor： Jiann-Ching Guey ,  Ming-Po Chang ,  Ju-Ya Chen

IPC: H04W16/28 ,  H04B7/06 ,  H04W72/04 ,  H04W84/04

CPC classification number: H04W16/28 ,  H04B7/0617 ,  H04B7/084 ,  H04W72/046 ,  H04W84/042

Abstract: A method of steering beam direction and shaping beamwidth of a directional beam using a phased antenna array in a beamforming cellular system is proposed. The N antenna elements of the phased antenna array are applied with a set of combined beam coefficients to steer the direction of the beam and to shape the beamwidth to a desired width. Specifically, in addition to the original constant phase shift values, additional phase modulations are applied to expand the beam to a desirable width. The phased antenna array applied with the combined beam coefficients involve only phase shift, no amplitude modulation is needed and thereby increasing beamforming gain and efficiency.

公开(公告)号：US09698884B2

公开(公告)日：2017-07-04

申请号：US14723689

申请日：2015-05-28

Applicant: MEDIATEK INC.

Inventor： Jiann-Ching Guey ,  Chia-Hao Yu ,  Ming-Po Chang

IPC: H04B7/06 ,  H04W74/08 ,  H04W72/04

CPC classification number: H04B7/0617 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0053 ,  H04W72/046 ,  H04W74/0833

Abstract: A method of control signaling in a beamforming system is proposed. A base station allocates a first sets of DL control resource blocks for DL transmission to a plurality of user equipments (UEs) in a beamforming network. Each set of DL control resource blocks is associated with a corresponding set of beamforming weights. The base station also allocates a second sets of UL control resource blocks for UL transmission from the UEs. Each set of UL control resource blocks is associated with the same corresponding set of beamforming weights. The base station transmits cell and beam identification information using a set of control beams. Each control beam comprises a set of DL control resource block, a set of UL control resource block, and the corresponding set of beamforming weights.

公开(公告)号：US20160080060A1

公开(公告)日：2016-03-17

申请号：US14854344

申请日：2015-09-15

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Ming-Po Chang ,  Ju-ya Chen ,  Jiann-Ching Guey

IPC: H04B7/06 ,  H04W72/04 ,  H04W72/08 ,  H04L5/00

CPC classification number: H04B7/0626 ,  H04B7/0408 ,  H04B7/0452 ,  H04B7/0695 ,  H04L5/0023 ,  H04L5/0051 ,  H04L5/0053

Abstract: A method of providing channel station information in a beamforming system is proposed. Reference Signal (RS) is used for channel state estimation. For fine-resolution dedicated beam with smaller spatial coverage, additional channel monitoring of coarse-resolution beams for beam fallback is applied. The joint coverage of monitored fallback beams covers a desired service area. For beam administration, fallback beams need to be evaluated and the most preferable beam is selected for use in case the currently used dedicated beam is no longer suitable. For link adaptation, at least the channel state of the selected fallback beam is evaluated and provided to a scheduler (e.g., a BS) for adapting the transmission of the selected fallback beam.

Abstract translation: 提出了一种在波束成形系统中提供信道站信息的方法。 参考信号（RS）用于信道状态估计。 对于具有较小空间覆盖的精细分辨率专用光束，应用用于光束后退的粗分辨率光束的附加通道监视。 受监视的后备光束的联合覆盖覆盖了所需的服务区域。 对于光束管理，需要评估回退光束，并且最优选的光束被选择用于当前使用的专用光束不再适用的情况。 对于链路自适应，至少所选择的回退波束的信道状态被评估并提供给调度器（例如，BS），以调整所选择的后备波束的传输。

公开(公告)号：US12149475B2

公开(公告)日：2024-11-19

申请号：US17752819

申请日：2022-05-24

Applicant: MEDIATEK INC.

Inventor： Chien-Yi Wang ,  Jiann-Ching Guey

IPC: H04L5/00

Abstract: A method of downlink channel state information (DL CSI) computation and reporting is proposed to support high velocity in new radio (NR) systems. In a first novel aspect, two CSI reference slots are defined. CSI reference slot for CSI measurement is defined for determining which CSI-RS/SSB occasion(s) is used for computing CSI. CSI reference slot for CSI computation is defined for determining the slot where UE assumes the CSI computation should be based upon the channel at that time onwards. In a second novel aspect, UE can be configured with a CSI computation period consisting of one or N slots and can be divided into multiple sub-periods without overlap. UE can be configured to compute and report wideband CSI and subband CSI for the whole CSI computation period and/or for each sub-period.

公开(公告)号：US20240283493A1

公开(公告)日：2024-08-22

申请号：US18440998

申请日：2024-02-14

Applicant: MediaTek Inc.

Inventor： Chia-Hao Yu ,  Tzu-Han Chou ,  Jiann-Ching Guey ,  Chin-Kuo Jao ,  Parisa Cheraghi ,  Chun-Chia Tsai

IPC: H04B7/0417 ,  H04B7/0452

CPC classification number: H04B7/0417 ,  H04B7/0452

Abstract: Various solutions for tiered channel information feedback with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine a first tier channel state information (CSI) based on a first reference signal resource measurement. The apparatus may report the first tier CSI to a network node. The apparatus may determine a second tier CSI based on the first tier CSI and based on a second reference signal resource measurement. The apparatus may report the second tier CSI to the network node. The second tier CSI may be different from the first tier CSI.

公开(公告)号：US20240137139A1

公开(公告)日：2024-04-25

申请号：US18374139

申请日：2023-09-28

Applicant: MediaTek Inc.

Inventor： Pedram Kheirkhah Sangdeh ,  Gyu Bum Kyung ,  Yahia Ahmed Mahmoud Mahmoud Shabara ,  Jiann-Ching Guey

IPC: H04B17/391

CPC classification number: H04B17/3913

Abstract: Techniques pertaining to channeling state information (CSI) pre-processing are described. A user equipment (UE) that is in wireless communication with a base station node extracts eigenvectors (EVs) from CSI acquired by the UE. The UE generates pre-processed CSI for compression by a machine-learning (ML)-based encoder of the UE into CSI feedback for the base station node by at least performing one or more of a phase discontinuity compensation (PDC), a one-step polarization separation with re-ordering, or a two-step polarization separation that includes separation based on polarization type and separation by position on the EVs.

公开(公告)号：US11672012B2

公开(公告)日：2023-06-06

申请号：US17315333

申请日：2021-05-09

Applicant: MediaTek Inc.

Inventor： Jiann-Ching Guey ,  Chun-Hsuan Kuo ,  Chien-Hwa Hwang ,  Chiou-Wei Tsai ,  Ming-Po Chang

IPC: H04W4/00 ,  H04W74/08 ,  H04W74/00 ,  H04W24/00 ,  H04W48/16 ,  H04W72/12 ,  H04W72/23 ,  H04L5/00

CPC classification number: H04W74/0816 ,  H04W24/00 ,  H04W48/16 ,  H04W72/12 ,  H04W72/23 ,  H04W74/006 ,  H04L5/001

Abstract: Techniques and examples of efficient detection of a transmission session in New Radio unlicensed spectrum (NR-U) are described. An apparatus (e.g., user equipment (UE)) detects presence of an indication from a base station of a wireless network in an NR-U. The apparatus determines that a transmission opportunity (TXOP) follows the indication responsive to the detecting. The apparatus then receives a downlink (DL) transmission in the NR-U from the base station during the TXOP.

公开(公告)号：US20230171128A1

公开(公告)日：2023-06-01

申请号：US17978961

申请日：2022-11-01

Applicant: MEDIATEK INC.

Inventor： Chien-Hwa Hwang ,  Jiann-Ching Guey

IPC: H04L25/02 ,  H04L5/00

CPC classification number: H04L25/0224 ,  H04L5/005 ,  H04L5/0007

Abstract: Method and apparatus are provided for joint communication and sensing with same radio resource in a mobile communication system. An apparatus can receive a common signal from a network node. The apparatus can use the common signal as a pilot signal to perform a channel estimation. The apparatus can use the common signal as a sensing signal to perform a sensing. The common signal comprises the pilot signal and the sensing signal.

公开(公告)号：US20230007518A1

公开(公告)日：2023-01-05

申请号：US17752825

申请日：2022-05-24

Applicant: MEDIATEK INC.

Inventor： Chien-Yi Wang ,  Jiann-Ching Guey

IPC: H04W24/08 ,  H04L5/00 ,  H04L1/00

Abstract: A method of downlink channel state information (DL CSI) computation and reporting is proposed to support high velocity in new radio (NR) systems. In a first novel aspect, two CSI reference slots are defined. CSI reference slot for CSI measurement is defined for determining which CSI-RS/SSB occasion(s) is used for computing CSI. CSI reference slot for CSI computation is defined for determining the slot where UE assumes the CSI computation should be based upon the channel at that time onwards. In a second novel aspect, UE can be configured with a CSI computation period consisting of one or N slots and can be divided into multiple sub-periods without overlap. UE can be configured to compute and report wideband CSI and subband CSI for the whole CSI computation period and/or for each sub-period.