公开(公告)号：US11025342B2

公开(公告)日：2021-06-01

申请号：US16922412

申请日：2020-07-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Pengfei Luo ,  Tong Jiang

IPC: H04B10/116 ,  H04B10/50 ,  H04B10/60

Abstract: A method includes receiving X pilot symbols, determining light source sequence numbers of the X light sources based on the X pilot symbols, receiving M×X undersampled pulse width modulation-based pulse position modulation (UPPM) symbols and parsing the M×X UPPM symbols thereby obtaining original data from a sending node by using N light sources. Each of the X pilot symbols includes W waveform segments. Each of the W waveform segments includes a first light source sequence number indication part that indicates a light source sequence number. Waveforms of waveform segments with odd sequence numbers in the W waveform segments are the same, waveforms of waveform segments with even sequence numbers in the W waveform segments are the same, and a duration of each of the W waveform segments is equal. The X pilot symbols are in a one-to-one correspondence with X light sources.

公开(公告)号：US12105188B2

公开(公告)日：2024-10-01

申请号：US17484462

申请日：2021-09-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Pengfei Luo ,  Tong Jiang

IPC: G01S13/86 ,  G01S7/292 ,  G01S7/40 ,  G01S7/487 ,  G01S13/931 ,  G01S17/931

CPC classification number: G01S13/865 ,  G01S7/292 ,  G01S7/40 ,  G01S7/487 ,  G01S13/931 ,  G01S17/931

Abstract: A radar power control method and an apparatus are provided. The method includes: emitting a first detection signal at a target emission angle; obtaining a reflectivity of a first detection point of the first detection signal if signal power of an echo signal of the first detection signal is less than a preset power threshold, where the first detection point is a point on a surface of a detected object in a direction of the target emission angle; and increasing emission power corresponding to the target emission angle if the reflectivity of the first detection point is greater than a preset first threshold. The solution helps consider both power consumption and a detection distance of a radar.

公开(公告)号：US11233567B2

公开(公告)日：2022-01-25

申请号：US16919913

申请日：2020-07-02

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Tong Jiang ,  Pengfei Luo

IPC: H04B10/114 ,  H04B10/116 ,  H04B10/2581 ,  H04B10/278 ,  H04B10/50

Abstract: Embodiments of this application disclose a communication method and an apparatus, and relate to the communications field, to resolve a problem of how to simultaneously perform transmission by using a plurality of light sources and increase transmission efficiency in a multi-light source scenario in an optical camera communications system. A specific solution is: generating N physical frames, where each of the physical frames includes a preamble, a mode indication, and valid data, the mode indication is used to indicate a sending mode of N light sources, the sending mode is a diversity mode or a multiplexing mode, and N is a positive integer greater than or equal to 2; and sending the N physical frames by using the N light sources, where one light source sends one physical frame. The embodiments of this application are used in an optical camera communication process.

公开(公告)号：US10897312B2

公开(公告)日：2021-01-19

申请号：US16692595

申请日：2019-11-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Tong Jiang ,  Pengfei Luo

IPC: H04B10/00 ,  H04B10/524 ,  H04B10/114 ,  H04B10/69

Abstract: A data transmission method, device, and system includes, when a preset condition is met, determining a quantity N of first symbols included in one first symbol group and a quantity K of bits transmitted in the first symbol group, where the preset condition is └ log2 mN┘>N·└ log2 m┘, K=└ log2 mN┘, m≥2, N≥2, and K≥3; obtaining X data blocks, where each of the first X−1 data blocks includes K bits, the last data block includes Y bits, X≥1, and K≥Y≥1; and processing each of the X data blocks into N first symbols to obtain NX first symbols, and sending the NX first symbols.

公开(公告)号：US20200092007A1

公开(公告)日：2020-03-19

申请号：US16692595

申请日：2019-11-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Tong Jiang ,  Pengfei Luo

IPC: H04B10/524 ,  H04B10/114 ,  H04B10/69

Abstract: A data transmission method, device, and system includes, when a preset condition is met, determining a quantity N of first symbols included in one first symbol group and a quantity K of bits transmitted in the first symbol group, where the preset condition is └log2 mN┘>N·└log2 m┘, K=└log 2 mN┘, m≥2, N≥2, and K≥3; obtaining X data blocks, where each of the first X−1 data blocks includes K bits, the last data block includes Y bits, X≥1, and K≥Y≥1; and processing each of the X data blocks into N first symbols to obtain NX first symbols, and sending the NX first symbols.