Title:
DATA PRE-PROCESSING METHOD, APPARATUS AND SYSTEM IN WIRELESS POSITIONING SYSTEM, AND MEDIUM
Document Type and Number:
WIPO Patent Application WO/2024/036845
Kind Code:
A1
Abstract:
The present disclosure belongs to the technical field of wireless communication signal positioning. Disclosed are a data pre-processing method, apparatus and system in a wireless positioning system, and a medium. The method in the embodiments of the present disclosure comprises: a signal receiving end determining first channel state information (CSI) to be pre-processed; the signal receiving end estimating a sampling time deviation by means of compensating each sub-carrier of each antenna channel with a corresponding phase difference, and performing phase compensation on the first CSI by using the sampling time deviation, so as to obtain second CSI; the signal receiving end performing inverse fast Fourier transform on the second CSI, so as to obtain a channel impulse response (CIR) signal; the signal receiving end performing a right cyclic shift of a first amplitude sequence of the CIR signal by a first number of sampling points, wherein the first number is the number of sampling points in a rise time of a main path of the amplitude sequence of the CIR signal; and the signal receiving end performing amplitude normalization on the first amplitude sequence of the CIR signal, which has been subjected to the right cyclic shift, so as to obtain a second amplitude sequence of the CIR signal.
Inventors:
LI YUQING (CN)
LIU PENG (CN)
QI WANGDONG (CN)
YOU XIAOHU (CN)
HUANG YONGMING (CN)
LIU SHENGHENG (CN)
JIA XINGHUA (CN)
LIU PENG (CN)
QI WANGDONG (CN)
YOU XIAOHU (CN)
HUANG YONGMING (CN)
LIU SHENGHENG (CN)
JIA XINGHUA (CN)
Application Number:
PCT/CN2022/139669
Publication Date:
February 22, 2024
Filing Date:
December 16, 2022
Export Citation:
Assignee:
PURPLE MOUNTAIN LABORATORIES (CN)
International Classes:
H04W64/00; H04B17/309
Domestic Patent References:
| WO2020134552A1 | 2020-07-02 |
Foreign References:
| CN112953659A | 2021-06-11 | |||
| CN112954791A | 2021-06-11 | |||
| CN113423097A | 2021-09-21 |
Other References:
YANGPENG YUAN, GUO XIANSHENG; HE YUANHU; LI LIN; HUANG JIAN: "A Dual-Band Time-Frequency Domain Joint Fingerprint Optimization Method for Indoor Localization ", JOURNAL OF SIGNAL PROCESSING, vol. 38, no. 4, 17 January 2022 (2022-01-17), pages 708 - 719, XP093140290
Attorney, Agent or Firm:
CN-KNOWHOW INTELLECTUAL PROPERTY AGENT LIMITED (CN)
Download PDF: