US 2023/0403097 A1 · HIGH-DIMENSIONAL NON-ORTHOGONAL TRANSMISSION METHOD

Abstract

A high-dimensional non-orthogonal transmission method is provided. In the method, signals of various users are mapped to form high-dimensional signals, and the high-dimensional signals are pre-coded, such that non-orthogonal transmission is realized in a higher dimension. Moreover, different users perform matched receiving on respective signals, and non-orthogonal transmission signals can be recovered merely by means of a receiver with a linear complexity. By means of the method, multi-user data non-orthogonal transmission can be realized without depending on conditions such as user pairing and collaboration, and various users do not need to perform iterative feedback, such that the detection complexity of non-orthogonal multi-user signals is significantly reduced.

A high-dimensional non-orthogonal transmission method, wherein in the method, a transmitter, a plurality of users and a plurality of channel resources are provided;

the transmitter is configured to process and transmit original signals of the plurality of users;
the plurality of users receive and recover respective original signals;
the plurality of channel resources comprise a time-domain, a frequency-domain and a space-domain resources, for the transmitter and the plurality of users to use;
the high-dimensional non-orthogonal transmission method comprises the following steps:
step 1:
mapping, by the transmitter, an original signal of a uth user to a uth high-dimensional original signal, wherein the uth high-dimensional original signal is as follows:
s
⁡
(
u
)
=
[
s
1
(
u
)
s
2
(
u
)
⋮
s
M
(
u
)
]
,
s
1
(
u
)
=
s
2
(
u
)
=
…
=
s
M
(
u
)
=
s
0
(
u
)
M
wherein s0(u) represents the original signal of the uth user, s(u) represents the uth high-dimensional original signal, s1(u) represents an ith dimension of the uth high-dimensional original signal, i=1, 2, . . . , M, and M represents a dimension of the uth high-dimensional original signal and has a value equal to a number of the channel resources;
step 2:
precoding, by the transmitter, the uth high-dimensional original signal to generate a uth high-dimensional transmission signal, wherein a precoding process is as follows:
x
⁡
(
u
)
=
[
x
1
(
u
)
x
2
(
u
)
⋮
x
M
(
u
)
]
=
[
s
1
(
u
)
⁢
α
1
(
u
)
s
2
⁢
(
u
)
⁢
α
2
⁢
(
u
)
⋮
s
M
(
u
)
⁢
α
M
(
u
)
]
wherein x(u) represents the uth high-dimensional transmission signal, xi(u) represents a ith dimension of the uth high-dimensional transmission signal, and α1(u) represents a ith dimension of a uth precoding signal;
step 3:
summing up, by the transmitter, all uth high-dimensional transmission signals to obtain a total high-dimensional transmission signal:
x
˜
=
∑
u
=
1
U
x
⁡
(
u
)
wherein U represents a number of the users, and {tilde over (x)} represents the total high-dimensional transmission signal;
broadcasting, by the transmitter, the total high-dimensional transmission signal to all the users by the plurality of channel resources, wherein one of the plurality of channel resources is used to transmit one dimension of the high-dimensional transmission signal;
and
step 4:
receiving, by the uth user, the total high-dimensional transmission signal to obtain a total high-dimensional received signal, and performing matched receiving on the total high-dimensional received signal according to the uth precoding signal to obtain an estimation of a uth original signal, wherein u=1, 2, . . . , U, and a matched receiving process is as follows:
x
~
^
=
[
x
~
^
1
x
~
^
2
⋮
x
~
^
M
]
s
ˆ
0
(
u
)
=
∑
i
=
1
M
a
i
*
(
u
)
⁢
x
˜
^
i
wherein ŝ0(u) represents the estimation of the uth original signal, αi*(u) represents a conjugation of the ith dimension of the uth precoding signal, {tilde over ({circumflex over (x)})} represents the total high-dimensional received signal, {tilde over ({circumflex over (x)})}i represents an ith dimension of the total high-dimensional signal, and i=1, 2, . . . , M.

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High-dimensional non-orthogonal transmission method

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High-dimensional non-orthogonal transmission method

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Abstract

Claims2