Anti-jamming processing architecture based on dual-component fusion application of satellite navigation signal
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.
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:
W
l
=
[
w
1
l
,
w
2
l
,
…
,
w
N
l
]
.
6. The anti-jamming method according to claim 3 , further comprising determining the filtering weight vector recursive formula based on the received data component and the time-domain anti-jamming data component:
W
l
=
W
l
-
1
-
α
x
data
(
n
)
2
+
β
e
*
(
n
)
x
data
(
n
)
=
W
l
-
1
-
α
x
data
(
n
)
2
+
β
[
s
data
(
n
)
-
y
data
(
n
)
]
*
x
data
(
n
)
=
W
l
-
1
+
α
x
data
(
n
)
2
+
β
y
data
*
(
n
)
x
data
(
n
)
;
wherein α and β denote step size control parameters; denotes an error signal; s data (n) denotes the satellite navigation signal; y data (n) denotes the time-domain anti-jamming data component; and ∥ ∥ 2 denotes an l2 norm.
7. The anti-jamming method according to claim 1 , wherein the received pilot component is:
x
pilot
(
n
)
=
[
x
pilot
(
n
)
,
x
pilot
(
n
-
1
)
,
…
,
x
pilot
(
n
-
N
+
1
)
]
T
;
wherein N denotes a length of an anti-jamming filter; n denotes data at time n; and T, a superscript, denotes a transpose operation.
8. The anti-jamming method according to claim 1 , further comprising filtering the received pilot component based on the filter weight to obtain the time-domain anti-jamming pilot component:
y
pilot
(
3
k
+
i
)
=
W
H
(
k
)
x
pilot
(
3
k
+
i
)
,
i
=
0
,
TagBox[",", "NumberComma", Rule[SyntaxForm, "0"]]
1
,
TagBox[",", "NumberComma", Rule[SyntaxForm, "0"]]
2
;
wherein k denotes a length number of a filter; (⋅) H denotes conjugate transpose; and x pilot denotes the received pilot component.
9. The anti-jamming method according to claim 8 , further comprising determining the filter weight update formula based on the received pilot component and the time-domain anti-jamming pilot component:
W
(
k
)
=
W
(
k
-
1
)
+
2
μ
3
∑
i
=
0
2
y
pilot
*
(
3
(
k
-
1
)
+
i
)
x
pilot
(
3
(
k
-
1
)
+
i
)
;
wherein μ denotes an anti-jamming convergence step size; and *, a superscript, denotes conjugation taking.