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

Patent metadata

Field	Value
Publication number	US-12449551-B2
Application number	US-202118041734-A
Country	US
Kind code	B2
Filing date	Oct 14, 2021
Priority date	Dec 24, 2020
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

A signal angle and signal frequency estimation method, apparatus, 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 element; substituting initial data into a signal function, and finding a solution to obtain the satellite signal; and obtaining the angel and frequency of the satellite signal according to the satellite signal. 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 the frequency of the satellite signal are estimated jointly, thereby facilitating subsequent obtaining and tracking the satellite signal by a satellite navigation receiver.

First claim

What is claimed is:

1. A signal angle and signal frequency estimation method, comprising:
collecting, by antenna elements of an antenna array in a satellite navigation receiver, a plurality of primary satellite signals and carrying out a time domain sampling on each primary satellite signal, to obtain initial data of satellite signals;
substituting, by a processor in the satellite navigation receiver, the initial data into a signal function to solve the satellite signals, 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

}

wherein X is a matrix representing the satellite signals, Y is a matrix representing the initial data, A represents a steering vector matrix, λ 1 and λ 2 represent regularization factors, and F represents a Fourier transform matrix, ∥·∥ 2,1 represents a norm 2,1 ;
wherein the substituting, by the processor in the satellite navigation receiver, the initial data into a signal function to solve the satellite signals comprises: re-weighting, by the processor, the signal function to obtain an objective function;
and substituting, by the processor, the initial data into the objective function to solve the satellite signals, 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

}

wherein X i represents an i-th row data of X, (X F) i represents an i-th row data of a matrix (X F), and ∥·∥ 2 represents a norm 2 , ρ i and κ i are respectively an i-th element in a weighted vector ρ and κ, i=1,2, . . . , J, ρ and κ are both J×1 dimensional weighted vector, and J is a number of columns of A;
acquiring, by the processor, an angle and a frequency of each satellite signal according to solved satellite signals;
forming, by the antenna array in the satellite navigation receiver, beams in a direction of the satellite signal according to the angle of the satellite signal; and
tracking, by a frequency locked loop in the satellite navigation receiver, the satellite signal according to the frequency of the satellite signal.

2. The signal angle and signal frequency estimation method according to claim 1 , wherein the substituting, by the processor, the initial data into the objective function to solve the satellite signal comprises:
substituting, by the processor, the initial data into the objective function, and
solving, by the processor, the objective function by using a complex-valued conjugate gradient descent method to obtain the satellite signals.

3. The signal angle and signal frequency estimation method according to claim 1 , wherein a sampling value of each satellite signal represents an incident angle of the satellite signal, and wherein the acquiring, by the processor, an angle and a frequency of each sate

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

• G01S19/36

  relating to the receiver frond end · 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