公开(公告)号：US11259266B2

公开(公告)日：2022-02-22

申请号：US16729279

申请日：2019-12-27

Applicant: Industrial Technology Research Institute

Inventor： I-Ping Chang ,  Chia-Shing Huang ,  Hung-Yi Teng ,  I-Hsien Li

IPC: H04W64/00 ,  H04L1/00 ,  H04W52/24 ,  H04L27/26 ,  H04B17/318

Abstract: An estimation device is provided. The distance estimation device includes a calibration circuit and a distance estimation circuit. The calibration circuit may receive channel state information (CSI), and obtain signal-path power and noise-path power according to the CSI, and perform calculation to divide the signal-path power by the noise-path power to obtain a signal-power calibration value. The distance estimation circuit is coupled to the calibration circuit. The distance estimation circuit receives a received signal strength indication (RSSI) and the signal-power calibration value, and obtains a path-loss exponent according to the RSSI and the signal-power calibration value, and obtains a distance-estimation value according to the signal-power calibration value and the path-loss exponent.

公开(公告)号：US12081208B2

公开(公告)日：2024-09-03

申请号：US18128916

申请日：2023-03-30

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Chih-Chung Chiu ,  Hung-Yi Teng ,  Chi-Chung Liao ,  Shou-Chung Hsieh ,  Ke-Horng Chen ,  Yan-Fu Jhou

IPC: H03K17/56

CPC classification number: H03K17/56

Abstract: A driving method for a multiple frequency coupling generator is provided. The method includes: in normal operations, interpreting an input digital control signal transmitted from a digital signal processor into an interpreted digital control signal; interpreting the interpreted digital control signal into a plurality of magnetic coupling signals by a magnetic coupling switch circuit; performing signal recovery and differential delay on the magnetic coupling signals by an interlocking circuit for reducing time difference and signal loss of the magnetic coupling signals; and when the interlocking circuit determines that the magnetic coupling signals have substantially no time difference and no signal loss, transforming the magnetic coupling signals into a first driving signal and a second driving signal by a switch circuit, a driver circuit and an output pad group to drive a backend driving loop.