Title:
BROADBAND MILLIMETER WAVE BEAM TRACKING METHOD BASED ON VEHICLE MOTION TRAJECTORY COGNITION
Document Type and Number:
WIPO Patent Application WO/2022/143561
Kind Code:
A1
Abstract:
The present application relates to the field of wireless communications. Disclosed is a broadband millimeter wave beam tracking method based on vehicle motion trajectory cognition. Rough estimation values of beam angles are first obtained according to positions and attitudes of vehicles of two parties at an initial moment in a communication scenario, and the state of the vehicles is determined from the next moment according to an abrupt change rate of a sending beam angle; if the state is a steering abrupt change mode, an observation valueŷ
k
of a received signal is calculated; if the state is a smooth change mode, an observation value [Equation 1] is calculated; the observation values in different modes are inputted into an improved particle filtering algorithm to perform beam fine estimation to obtain an optimization value x
k
and u
k
; by using a beam optimization value at a current moment, a transceiving beamforming vector is re-estimated and then sent to the vehicle for adjustment, and a pilot signal at the next moment is sent; and beamforming vectors at different moments are continuously adjusted to achieve beam tracking within an error range.
Inventors:
ZHANG QIXUN (CN)
FENG ZHIYONG (CN)
SUN HUAN (CN)
WEI ZHIQING (CN)
HUANG SAI (CN)
ZHANG YIFAN (CN)
FENG ZHIYONG (CN)
SUN HUAN (CN)
WEI ZHIQING (CN)
HUANG SAI (CN)
ZHANG YIFAN (CN)
Application Number:
PCT/CN2021/141756
Publication Date:
July 07, 2022
Filing Date:
December 27, 2021
Export Citation:
Assignee:
UNIV BEIJING POSTS & TELECOMM (CN)
International Classes:
H04W4/40
Foreign References:
| CN110429964A | 2019-11-08 | |||
| CN110492911A | 2019-11-22 | |||
| CN105052199A | 2015-11-11 | |||
| US20200128597A1 | 2020-04-23 | |||
| CN112738764A | 2021-04-30 |
Attorney, Agent or Firm:
PATENTSINO IP FIRM (CN)
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