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：US12177162B2

公开(公告)日：2024-12-24

申请号：US17686791

申请日：2022-03-04

Applicant: MEDIATEK INC.

Inventor： Tzu-Han Chou ,  Cheng-Rung Tsai ,  Jiann-Ching Guey

IPC: H04L5/00

Abstract: A partial sounding method for sounding-reference-signal (SRS) is proposed. The network node may transmit higher-layer signal configuring a fractional SRS resource for partial sounding in configured resource blocks (RBs) to user equipment (UE). The UE may determine an SRS sequence length and a frequency-domain starting position of the fractional SRS resource based on the higher-layer signal to increase the SRS capacity.

公开(公告)号：US20240340655A1

公开(公告)日：2024-10-10

申请号：US18599391

申请日：2024-03-08

Applicant: MEDIATEK INC.

Inventor： TSUNG-WEI CHIANG ,  HSUAN-YI WU ,  Jiann-Ching Guey ,  Chien-Hwa Hwang

IPC: H04W16/28 ,  H04B7/06 ,  H04L5/00 ,  H04W24/08

CPC classification number: H04W16/28 ,  H04B7/0617 ,  H04L5/0051 ,  H04W24/08

Abstract: A user equipment (UE) measures one or more reference signals received from a base station to estimate a set of parameters that characterize a wireless channel between the UE and the base station. The set of parameters includes at least a respective departure angle associated with each path of a plurality of paths of the wireless channel. The UE transmits the set of parameters to the base station to enable the base station to facilitate beamforming strategies to enhance signal quality at the UE based on at least one of a channel matrix and a transmit covariance matrix associated with the wireless channel. The channel matrix and transmit covariance matrix are represented by the set of parameters.

公开(公告)号：US20240178896A1

公开(公告)日：2024-05-30

申请号：US18508148

申请日：2023-11-13

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Jiann-Ching Guey ,  Tzu-Han Chou ,  CHIN-KUO JAO

IPC: H04B7/06

CPC classification number: H04B7/0626 ,  H04B7/0639

Abstract: Method and user equipment (UE) are provided for CSI compression based on multi-dimensional MIO RF signature. In one novel aspect, the UE receives CSI-RS, estimates a basis matrix and a coefficient matrix of a downlink channel matrix based on the at least one CSI-RS, wherein the basis matrix is an N-dimensional non-orthogonal matrix, with N greater than two, and the coefficient matrix is a linear combination coefficient matrix for the basis matrix, and transmits to the network at least one feedback comprising feeding back the basis matrix in a first periodicity and feeding back the coefficient matrix in a second periodicity. In one embodiment, the UE compresses the basis matrix and the coefficient matrix to a feedback basis matrix and a feedback coefficient matrix before transmitting.

公开(公告)号：US11546897B2

公开(公告)日：2023-01-03

申请号：US16823770

申请日：2020-03-19

Applicant: MediaTek Inc.

Inventor： Cheng-Rung Tsai ,  Jiann-Ching Guey

IPC: H04W72/04 ,  H04W74/08

Abstract: A user equipment terminal (UE) operates in a wireless network according to a configuration. The UE receives the configuration for a physical downlink control channel (PDCCH), and detects downlink control information (DCI) in the PDCCH. From the DCI, the UE receives control information for a serving cell configured with one or more bandwidth units in a frequency domain. The control information is provided for each bandwidth unit of the serving cell. According to the control information, the UE performs a downlink reception from the serving cell or an uplink transmission to the serving cell.

公开(公告)号：US11490428B2

公开(公告)日：2022-11-01

申请号：US16368853

申请日：2019-03-29

Applicant: MediaTek Inc.

Inventor： Chiou-Wei Tsai ,  Jiann-Ching Guey ,  Chun-Hsuan Kuo

IPC: H04W74/08 ,  H04L5/00 ,  H04W72/12 ,  H04W74/00

Abstract: Techniques and examples of design for initial access in New Radio (NR) unlicensed spectrum (NR-U) are described. An apparatus receives from a base station of a wireless network which transmits one or multiple synchronization signal and PBCH blocks (SS/PBCH blocks) whose indices are indicated in a cyclic-wrapped order subject to a result of listen-before-talk (LBT) in NR-U. The apparatus also transmits a random access request on random access channel (RACH) resources allocated by the base station.

公开(公告)号：US11258560B2

公开(公告)日：2022-02-22

申请号：US16683108

申请日：2019-11-13

Applicant: MEDIATEK INC.

Inventor： Lung-Sheng Tsai ,  Weidong Yang ,  Jiann-Ching Guey

IPC: H04L27/26 ,  H04W16/02 ,  H04W72/04 ,  H04L5/00 ,  H04B17/336 ,  H04B7/06 ,  H04W24/10

Abstract: In one novel aspect, multiple TRPs information are provided for REG bundle configuration with PDCCH transmission and reception with multiple transmission points (TRPs). The UE configures a PDCCH associated with a CORESET comprising multiple CCEs, partitions the CORESET into multiple CCE groups associated with corresponding TCI-state, which corresponds to a source TRP, configures multiple resource element group (REG) bundles each with multiple resource elements (REs), and assumes the same precoder applied on PDCCH DMRS when the REs are in the same REG bundle and are associated with the same source TRP, and wherein each source TRP transmits corresponding portion of DCI data mapping to the corresponding first and second CCE group. In one embodiment, the REG bundles are predefined with each comprises only REs associated with the same source TRP. In another embodiment, each CCE group corresponding to a source TRP is indicated for the REG bundle configurations.