公开(公告)号：US20200336207A1

公开(公告)日：2020-10-22

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: Embodiments of this application relate to the communications field, disclose a camera communication method and an apparatus. A solution is: generating N pilot symbols and M×N UPPM symbols, where each of the N pilot symbols includes W waveform segments, each of the W waveform segments includes a first light source sequence number indication part used to indicate 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 duration of each of the W waveform segments is equal; and sending the N pilot symbols and the M×N UPPM symbols by using the N light sources, where one light source is used to send one pilot symbol and M UPPM symbols. The embodiments of this application are used in an optical camera communication process.

公开(公告)号：US20220011425A1

公开(公告)日：2022-01-13

申请号：US17484462

申请日：2021-09-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Pengfei LUO ,  Tong JIANG

IPC: G01S13/86 ,  G01S7/40 ,  G01S7/292 ,  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：US20200336206A1

公开(公告)日：2020-10-22

申请号：US16919913

申请日：2020-07-02

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Tong JIANG ,  Pengfei LUO

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

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.