Anti-jamming processing architecture based on dual-component fusion application of satellite navigation signal

Patent metadata

Field	Value
Publication number	US-12413330-B2
Application number	US-202418973147-A
Country	US
Kind code	B2
Filing date	Dec 9, 2024
Priority date	Dec 26, 2023
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

The provided is an anti-jamming processing architecture based on a dual-component fusion application of a satellite navigation signal. The anti-jamming processing architecture includes: a receiver matched reception module, configured to receive a satellite navigation signal and separate the satellite navigation signal into a pilot component and a data component; a data channel anti-jamming module, configured to design a filtering weight vector recursive formula and perform anti-jamming on the received data component based on an updated filtering weight vector; a pilot channel anti-jamming module, configured to design a filter weight update formula and perform anti-jamming on the received pilot component based on an updated filter weight; and a data fusion application module, configured to perform message solving and pseudocode ranging respectively based on an anti-jamming data component and pilot component, fuse a pseudocode ranging result and solved message information, and provide a fusion result for a user.

First claim

What is claimed is:

1. An anti-jamming method based on a dual-component fusion application of a satellite navigation signal, comprising:
receiving the satellite navigation signal, separating the satellite navigation signal into a pilot component and a data component, and performing weighted summation on the pilot component and the data component to achieve matched reception of the satellite navigation signal;
filtering the received data component based on a filtering weight vector to obtain a time-domain anti-jamming data component, determining a filtering weight vector recursive formula based on the received data component and the time-domain anti-jamming data component, continuously updating the filtering weight vector of a next batch of data component according to the filtering weight vector recursive formula, and performing anti-jamming on the received data component based on the updated filtering weight vector to obtain an anti-jamming data component;
performing batch filtering on the received pilot component based on a filter weight to obtain a time-domain anti-jamming pilot component, determining a filter weight update formula based on the received pilot component and the time-domain anti-jamming pilot component, and continuously updating a filter weight of a next batch of data based on the filter weight update formula, and performing anti-jamming on the received pilot component based on the updated filter weight to obtain an anti-jamming pilot component, wherein the filter weight is updated once for each batch of data received; and
receiving the anti-jamming data component and the anti-jamming pilot component, perform message solving and pseudocode ranging respectively based on the anti-jamming data component and the anti-jamming pilot component to obtain a pseudocode ranging result and solved message information, fusing the pseudocode ranging result and the solved message information to obtain a fusion result, and
providing the fusion result including the pseudocode ranging result and the solved message information to a user and allowing utilization of the dual-component characteristic of the navigation signal by the user.

2. The anti-jamming method according to claim 1 , further comprising determining a frequency of a matched filter for implementing the matched reception of the satellite navigation signal:

h
⁡
(
t
)

↔
FFT

H
⁡
(
ω
)

=

kS
*

(
ω
)

⁢

e

-
j

⁢
ω
⁢

t
0

;

wherein h(t) denotes an impulse response of the matched filter; H(ω) denotes a frequency response function of the matched filter; k denotes a transfer coefficient; S(ω) denotes a frequency spectrum of a predetermined component signal; t 0 denotes a sampling time; and *, a superscript, denotes conjugation taking.

3. The anti-jamming method according to claim 1 , further comprising filtering the received data component based on the filtering weight vector to obtain the time-domain anti-jamming data component:

y
data

(
n
)

=

x
data

·
W

=

∑

k
=
1

N

x
data

(

n
-
k
+
1

)

⁢

w
k
l

;

wherein x data denotes the received data component; W denotes the filtering weight vector; N denotes a length of an anti-jamming filter; n denotes data at time n; k denotes a filter coefficient number; w k l denotes a k-th filter coefficient for an l-th iteration; and l denotes a weight vector iteration number of the anti-jamming filter.

4. The anti-jamming method according to claim 3 , wherein the received data component is:

x
data

=

[

x
data

(
n
)

,

x
data

(

n
-
1

)

,
…

,

x
data

(

n
-
N
+
1

)

]

T

;

wherein T, a superscript, denotes a transpose operation.

5. The anti-jamming method according to claim 3 , wherein the filtering weight vector is:

Assignees

• National Univ Of Defense Technology

Inventors

• Lu Zukun
• Song Jie
• Xiao Zhibin
• Chen Feiqiang
• Li Baiyu
• Huang Long
• Xue Zhihao

Classifications

• H04K3/224

  with countermeasures at transmission and/or reception of the jammed signal, e.g. stopping operation of transmitter or receiver, nulling or enhancing transmitted power in direction of or at frequency of jammer · CPC title

• Y02D30/70

  in wireless communication networks · CPC title

• G01S19/37

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

• H04K3/90 Primary

  related to allowing or preventing navigation or positioning, e.g. GPS · CPC title

• G01S19/21 Primary

  Interference related issues {; Issues related to cross-correlation, spoofing or other methods of denial of service} · CPC title