Signal angle and signal frequency estimation method, apparatus and device and storage medium

Patent metadata

Field	Value
Publication number	US-2023314622-A1
Application number	US-202118041734-A
Country	US
Kind code	A1
Filing date	Oct 14, 2021
Priority date	Dec 24, 2020
Publication date	Oct 5, 2023
Grant date	—

Abstract

A signal angle and signal frequency estimation method, appartus, device and storage medium are provided. The signal angle and signal frequency estimation method comprises the steps: collecting initial data of a satellite signal by means of an antenna array (S 10 ); substituting initial data into a signal function, and finding a solution to obtain the satellite signal (S 20 ); and obstaning the angle and a frequency of the satellite signal according to the satellite signal (S 30 ). According to the method, in consideration of the non-Gaussian noise environment as well as spatial domain sparse feature and frequency domain sparse feature of the satellite signal, the angle and a frequency of the satellite signal are estimated jointly, thereby facilitating subsequent obtaining and tracking the satellite signal by a satellite navigation receiver.

First claim

1 . A signal angle and signal frequency estimation method, comprising:
collecting initial data of a satellite signal by an antenna array; substituting the initial data into a signal function to solve the satellite signal; and acquiring an angle and a frequency of the satellite signal according to the solved satellite signal.

2 . The signal angle and signal frequency estimation method according to claim 1 , wherein the substituting the initial data into a signal function to solve a satellite signal comprises:
re-weighting the signal function to obtain an objective function; and substituting the initial data into the objective function to solve the satellite signal.

3 . The signal angle and signal frequency estimation method according to claim 2 , wherein the substituting the initial data into the objective function to solve the satellite signal comprises:
substituting the initial data into the objective function, and solving the objective function by using a complex-valued conjugate gradient descent method to obtain the satellite signal.

4 . The signal angle and signal frequency estimation method according to claim 1 , wherein a sampling value of the satellite signal represents an incident angle of the satellite signal, and wherein the acquiring an angle and a frequency of the satellite signal according to the solved satellite signal comprises:
performing Fourier transform on the satellite signal to obtain the frequency of the satellite signal.

5 . The signal angle and signal frequency estimation method according to claim 1 , wherein an expression of the signal function is:

X
=

arg
⁢

min

X

⁢

{



Y
-
AX



2
,
1

+

λ
1

⁢


X


2
,
1

+

λ
2

⁢


XF


2
,
1

}

where X represents the satellite signal, Y represents the initial data, A represents a steering vector matrix, λ 1 and λ 2 represent regularization factors, and F represents a Fourier transform.

6 . The signal angle and signal frequency estimation method according to claim 2 , wherein an expression of the objective function is

X
=

arg
⁢

min

X

⁢

{



Y
-
AX



2
,
1

+

λ
1

⁢

∑

i
=
1

J

ρ
i

⁢



X
i



2

+

λ
2

⁢

∑

i
=
1

J

κ
i

⁢



(
XF
)

i



2

}

where ρ i and κ i are the i-th elements in weighted vectors ρ and κ respectively, i=1, 2, . . . , J, and J is a number of columns of A.

7 . A signal angle and signal frequency estimation device, comprising:
a collecting module, configured to collect initial data of a satellite signal by an antenna array; a substitution solving module, configured to send feedback data to a sharing platform; and an acquisition module, configured to acquire the angle and the frequency of the satellite signal according to the solved satellite signal.

8 . A signal angle and signal frequency estimation device, wherein the signal angle and signal frequency estimation device comprise

Assignees

• Univ Shenzhen

Inventors

• Li Qiang
• Huang Lei
• Zhao Bo
• Huang Min
• Sun Weize
• Zhang Peichang
• Liu Shiqi
• Zhao Yuan

Classifications

• G01S19/37 Primary

  Hardware or software details of the signal processing chain · CPC title

• Y02D30/70

  in wireless communication networks · CPC title

• G01S3/14 Primary

  Systems for determining direction or deviation from predetermined direction {(aerial arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00; combinations of different interacting aerial units for giving a desired directional characteristic H01Q21/29; aerials or aerial systems providing at least two radiation patterns H01Q25/00)} · CPC title

• G01S19/36

  relating to the receiver frond end · CPC title