US 11,652,542 B2Granted

Device and method for inserting quadruplet and device and method for extracting quadruplet

AssigneeMitsubishi Electric Corporation

InventorsCristina Ciochina, Arnaud Bouttier, Jean-Christophe Sibel

Life of this patent

Estimating the term…

Abstract

The invention relates to inserting reference signals in a radio signal to be transmitted over a wireless communication system, the radio signal being emitted according to a specific SS-STBC scheme, the method comprising, inserting the reference signals to transmit them in the radio signal such as samples of these reference signals are in specific positions in the SS-STBC symbol.

Claims20

Dependent claims

A method for inserting K quadruplets of a first, a second, a third and a fourth Reference Signals in a radio signal to be transmitted over a wireless communication system, said radio signal being emitted by an emitter comprising at least two transmit antennas, each transmit antenna being configured for transmitting on at least an even number M, strictly greater than 1, of different frequencies, and K being a strictly positive integer smaller than or equal to M/2, said radio signal being provided by:

applying a first block of M symbols X=(X0, . . . XM−1) to a precoder to obtain a second block of M symbols Y=(Y0, . . . YM−1), with
Y
k
=
{
ɛ
⁢
X
M
2
+
P
1
+
mod
⁡
(
-
k
+
P
1
+
p
-
1
,
Q
)
*
,
⁢
for
⁢
⁢
k
∈
〚
P
1
;
M
2
-
P
2
〚
-
ɛ
⁢
⁢
X
P
1
+
m
⁢
o
⁢
d
⁡
(
-
k
+
P
1
+
M
2
+
p
-
1
,
Q
)
*
,
for
⁢
⁢
k
∈
〚
M
2
+
P
1
;
M
-
P
2
〚
,
with P1 and P2 predefined positive integers, such as P1+P2 is strictly smaller than M/2, p is a predefined integer, Q is a positive integer smaller than M/2, and ε is 1 or −1 and Xk* being the complex conjugate of Xk;
applying at least a M size DFT then a N size IDFT corresponding to a first transmit antenna, to the first block of M symbols to obtain a first single-carrier frequency division multiple access, SC-FDMA, symbol representing the first block of M symbols, said first SC-FDMA symbol being of a given duration;
applying at least a M size DFT then a N size IDFT corresponding to a second transmit antenna, to the second block of M symbols to obtain a second single-carrier frequency division multiple access, SC-FDMA, symbol representing the second block of M symbols, said second SC-FDMA symbol being of the given duration;
transmitting during a time interval of the given duration, respectively on the first and second transmit antennas, simultaneously the first and second SC-FDMA symbols, into the radio signal;
said method comprising:
determining a number L smaller than or equal to min(M/2−P1−P2;
K) of integers such as
{
n
i
|
i
∈
〚
1
;
L
〛
,
P
1
≤
n
i
<
M
2
-
P
2
,
∀
i
,
j
∈
〚
1
;
L
〛
2
,
i
<
j
⇒
n
i
<
n
j
}
;
and for each i-th quadruplet out of L quadruplets of a first, a second, a third and a fourth Reference Signals among the K quadruplets:
inserting the first Reference Signal such as samples of the first Reference Signal are in positions in the first SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
inserting the second Reference Signal such as samples of the second Reference Signal are in positions in the first SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
m
⁢
o
⁢
d
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols;
inserting the third Reference Signal such as samples of the third Reference Signal are in positions in the second SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
inserting the fourth Reference Signal such as samples of the fourth Reference Signal are in positions in the second SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
m
⁢
o
⁢
d
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols.

255 more elements

A non-transitory computer readable medium having stored thereon a computer program product comprising code instructions that when executed by at least a processor cause the processor to perform a method for inserting K quadruplets of a first, a second, a third and a fourth Reference Signals in a radio signal to be transmitted over a wireless communication system, said radio signal being emitted by an emitter comprising at least two transmit antennas, each transmit antenna being configured for transmitting on at least an even number M, strictly greater than 1, of different frequencies, and K being a strictly positive integer smaller than or equal to M/2, said radio signal being provided by:

applying a first block of M symbols X=(X0, . . . XM−1) to a precoder to obtain a second block of M symbols Y=(Y0, . . . YM−1), with
Y
k
=
{
ɛ
⁢
⁢
X
M
2
+
P
1
+
mod
⁡
(
-
k
+
P
1
+
p
-
1
,
Q
)
*
,
for
⁢
⁢
k
∈
〚
P
1
;
M
2
-
P
2
〚
-
ɛ
⁢
⁢
X
P
1
+
mod
⁡
(
-
k
+
P
1
+
M
2
+
p
-
1
,
Q
)
*
,
for
⁢
⁢
k
∈
〚
M
2
+
P
1
;
M
-
P
2
〚
,
with P1 and P2 predefined positive integers, such as P1+P2 is strictly smaller than M/2, p a predefined integer, Q is a positive integer smaller than M/2, and ε is 1 or −1 and Xk* being the complex conjugate of Xk;
applying at least a M size DFT then a N size IDFT corresponding to a first transmit antenna, to the first block of M symbols to obtain a first single-carrier frequency division multiple access, SC-FDMA, symbol representing the first block of M symbols, said first SC-FDMA symbol being of a given duration;
applying at least a M size DFT then a N size IDFT corresponding to a second transmit antenna, to the second block of M symbols to obtain a second single-carrier frequency division multiple access, SC-FDMA, symbol representing the second block of M symbols, said second SC-FDMA symbol being of the given duration;
transmitting during a time interval of the given duration, respectively on the first and second transmit antennas, simultaneously the first and second SC-FDMA symbols, into the radio signal;
said method comprising:
determining a number L smaller than or equal to min(M/2−P1−P2;
K) of integers such as
{
n
i
❘
i
∈
〚
1
;
L
〛
,
P
1
≤
n
i
<
M
2
-
P
2
,
∀
i
,
j
∈
〚
1
;
L
〛
2
,
i
<
j
⇒
n
i
<
n
j
}
;
and for each i-th quadruplet out of L quadruplets of a first, a second, a third and a fourth Reference Signals among the K quadruplets:
inserting the first Reference Signal such as samples of the first Reference Signal are in positions in the first SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
inserting the second Reference Signal such as samples of the second Reference Signal are in positions in the first SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols;
inserting the third Reference Signal such as samples of the third Reference Signal are in positions in the second SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
inserting the fourth Reference Signal such as samples of the fourth Reference Signal are in positions in the second SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols.

243 more elements

A device for inserting K quadruplets of a first, a second, a third and a fourth Reference Signals in a radio signal to be transmitted over a wireless communication system, said radio signal being emitted by an emitter comprising at least two transmit antennas, each transmit antenna being configured for transmitting on at least an even number M, strictly greater than 1, of different frequencies, and K being a strictly positive smaller than or equal to M/2, said radio signal being processed by:

applying a first block of M symbols X=(X0, . . . XM−1) to a precoder to obtain a second block of M symbols Y=(Y0, . . . YM−1), with
Y
k
=
{
ɛ
⁢
⁢
X
M
2
+
P
1
+
mod
⁡
(
-
k
+
P
1
+
p
-
1
,
Q
)
*
,
for
⁢
⁢
k
∈
〚
P
1
;
M
2
-
P
2
〚
-
ɛ
⁢
⁢
X
P
1
+
mod
⁡
(
-
k
+
P
1
+
M
2
+
p
-
1
,
Q
)
*
,
for
⁢
⁢
k
∈
〚
M
2
+
P
1
;
M
-
P
2
〚
,
with P1 and P2 predefined positive integers, such as P1+P2 is strictly smaller than M/2, p a predefined integer, Q is a positive integer smaller than M/2, and 6 is 1 or −1 and Xk* being the complex conjugate of Xk;
applying at least a M size DFT then a N size IDFT corresponding to a first transmit antenna, to the first block of M symbols to obtain a first single-carrier frequency division multiple access, SC-FDMA, symbol representing the first block of M symbols, said first SC-FDMA symbol being of a given duration;
applying at least a M size DFT then a N size IDFT corresponding to a second transmit antenna, to the second block of M symbols to obtain a second single-carrier frequency division multiple access, SC-FDMA, symbol representing the second block of M symbols, said second SC-FDMA symbol being of the given duration;
transmitting during a time interval of the given duration, respectively on the first and second transmit antennas, simultaneously the first and second SC-FDMA symbols, into the radio signal;
said device comprising:
a processor;
and
a non-transitory computer-readable medium comprising instructions stored thereon, which when executed by the processor configure the device to:
determine a number L smaller than or equal to min(M/2-P1-P2;
K) of integers such as
{
n
i
❘
i
∈
〚
1
;
L
〛
,
P
1
≤
n
i
<
M
2
-
P
2
,
∀
i
,
j
∈
〚
1
;
L
〛
2
,
i
<
j
⇒
n
i
<
n
j
}
;
and
for each i-th quadruplet out of L quadruplets of a first, a second, a third and a fourth Reference Signals among the K quadruplet:
insert the first Reference Signal such as samples of the first Reference Signal are in positions in the first SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
insert the second Reference Signal such as samples of the second Reference Signal are in positions in the first SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols;
insert the third Reference Signal such as samples of the third Reference Signal are in positions in the second SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
insert the fourth Reference Signal such as samples of the fourth Reference Signal are in positions in the second SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols.

247 more elements

A method for extracting K quadruplets of a first, a second, a third and a fourth Reference Signals in a radio signal received over a wireless communication system, said radio signal being emitted by an emitter comprising at least two transmit antennas, each transmit antenna being configured for transmitting on at least an even number M, strictly greater than 1, of different frequencies, and K being a strictly positive integer smaller than or equal to M/2, the emission of the radio signal being processed by:

applying a first block of M symbols X=(X0, . . . XM−1) to a precoder to obtain a second block of M symbols Y=(Y0, . . . YM−1), with
Y
k
=
{
ɛ
⁢
⁢
X
M
2
+
P
1
+
mod
⁡
(
-
k
+
P
1
+
p
-
1
,
Q
)
*
,
for
⁢
⁢
k
∈
〚
P
1
;
M
2
-
P
2
〚
-
ɛ
⁢
⁢
X
P
1
+
mod
⁡
(
-
k
+
P
1
+
M
2
+
p
-
1
,
Q
)
*
,
for
⁢
⁢
k
∈
〚
M
2
+
P
1
;
M
-
P
2
〚
,
with P1 and P2 predefined positive integers, such as P1+P2 is strictly smaller than M/2, p a predefined integer, Q is a positive integer smaller than M/2, and ε is 1 or −1 and Xk* being the complex conjugate of Xk;
applying at least a M size DFT then a N size IDFT corresponding to a first transmit antenna, to the first block of M symbols to obtain a first single-carrier frequency division multiple access, SC-FDMA, symbol representing the first block of M symbols, said first SC-FDMA symbol being of a given duration;
applying at least a M size DFT then a N size IDFT corresponding to a second transmit antenna, to the second block of M symbols to obtain a second single-carrier frequency division multiple access, SC-FDMA, symbol representing the second block of M symbols, said second SC-FDMA symbol being of the given duration;
transmitting during a time interval of the given duration, respectively on the first and second transmit antennas, simultaneously the first and second SC-FDMA symbols, in the radio signal;
said first, second, third and fourth reference signals being inserted in the radio signal by:
determining a number L smaller than or equal to min(M/2−P1−P2;
K) of integers such as
{
n
i
❘
i
∈
〚
1
;
L
〛
,
P
1
≤
n
i
<
M
2
-
P
2
,
∀
i
,
j
∈
〚
1
;
L
〛
2
,
i
<
j
⇒
n
i
<
n
j
}
;
and for each i-th quadruplet out of L quadruplets of a first, a second, a third and a fourth Reference Signals among the K quadruplets:
inserting the first Reference Signal such as samples of the first Reference Signal are in positions in the first SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
inserting the second Reference Signal such as samples of the second Reference Signal are in positions in the first SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols;
inserting the third Reference Signal such as samples of the third Reference Signal are in positions in the second SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
inserting the fourth Reference Signal such as samples of the fourth Reference Signal are in positions in the second SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols;
said method comprising for at least one quadruplet i of first, second, third and fourth Reference Signals among the L quadruplets:
extracting, before applying N size DFT on the received radio signal, parts of the radio signal, each part being received in one time window among time windows, said time windows being strictly included in the given time interval;
processing said extracted parts independently from other parts of the received radio signal.

246 more elements

A device for extracting K quadruplets of a first, a second, a third and a fourth Reference Signals in a radio signal received over a wireless communication system, said radio signal being emitted by an emitter comprising at least two transmit antennas, each transmit antenna being configured for transmitting on at least an even number M, strictly greater than 1, of different frequencies, and K being a strictly positive integer smaller than or equal to M/2, the emission of the radio signal being processed by:

applying a first block of M symbols X=(X0, . . . XM−1) to a precoder to obtain a second block of M symbols Y=(Y0, . . . YM−1), with
Y
k
=
{
ε
⁢
X
M
2
+
P
1
+
mod
(
-
k
+
P
1
+
p
-
1
,
Q
)
*
,
for
⁢
k
∈
〚
P
1
;
M
2
-
P
2
〚
_
-
ε
⁢
X
P
1
+
mod
(
-
k
+
P
1
+
M
2
+
p
-
1
,
Q
)
*
,
for
⁢
k
∈
〚
M
2
+
P
1
;
M
-
P
2
〚
′
_
with P1 and P2 predefined positive integers, such as P1+P2 is strictly smaller than M/2, p a predefined integer, Q is a positive integer smaller than M/2, and ε is 1 or −1 and Xk* being the complex conjugate of Xk;
applying at least a M size DFT then a N size IDFT corresponding to a first transmit antenna, to the first block of M symbols to obtain a first single-carrier frequency division multiple access, SC-FDMA, symbol representing the first block of M symbols, said first SC-FDMA symbol being of a given duration;
applying at least a M size DFT then a N size IDFT corresponding to a second transmit antenna, to the second block of M symbols to obtain a second single-carrier frequency division multiple access, SC-FDMA, symbol representing the second block of M symbols, said second SC-FDMA symbol being of the given duration;
transmitting during a time interval of the given duration, respectively on the first and second transmit antennas, simultaneously the first and second SC-FDMA symbols, into the radio signal;
said first, second, third and fourth reference signals being inserted in the radio signal by:
determining a number L smaller than or equal to min(M/2−P1−P2;
K) of integers such as
{
n
i
⁢
❘
"\[LeftBracketingBar]"
i
∈
〚
1
;
L
〛
,
P
1
≤
n
i
<
M
2
-
P
2
,
∀
i
,
j
∈
〚
1
;
L
〛
2
,
i
<
j
⇒
n
i
<
n
j
}
;
and
for each i-th quadruplet out of L quadruplets of a first, a second, a third and a fourth Reference Signals among the K quadruplets:
inserting the first Reference Signal such as samples of the first Reference Signal are in positions in the first SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
inserting the second Reference Signal such as samples of the second Reference Signal are in positions in the first SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
mod
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the rust block of M symbols;
inserting the third Reference Signal such as samples of the third Reference Signal are in positions in the second SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
inserting the fourth Reference Signal such as samples of the fourth Reference Signal are in positions in the second SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
mod
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols;
said device comprising:
a processor;
and
a non-transitory computer-readable medium comprising instructions stored thereon, which when executed by the processor configure the device to,
for at least one quadruplet i of first, second, third and fourth Reference Signals:
extract, before applying N size DFT modules on the received radio signal, parts of the radio signal, each part being received in one time window among time windows, said time windows being strictly included in the given time interval;
process said extracted parts independently from other parts of the received radio signal.

247 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/967,689Filed 18 Feb 2019
Priority: EP 1830532222 Mar 2018
Published: US 2021/0036773 A14 Feb 2021
Granted: 16 May 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04B 7/0413
Using two or more spaced independent antennas: mIMO systems
H04B 7/208
Multiple access: frequency-division multiple access [FDMA]
H04B 7/0456
MIMO systems: selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
H04B 7/2126
Synchronisation: using a reference station

Family

US 2021/0036773 A1Pre-grant publication · published 4 Feb 2021
US 11,652,542 B2This patent

From the US filing history. Foreign family members aren’t listed.

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Abstract

applying a first block of M symbols X=(X0, . . . XM−1) to a precoder to obtain a second block of M symbols Y=(Y0, . . . YM−1), with
Y
k
=
{
ɛ
⁢
X
M
2
+
P
1
+
mod
⁡
(
-
k
+
P
1
+
p
-
1
,
Q
)
*
,
⁢
for
⁢
⁢
k
∈
〚
P
1
;
M
2
-
P
2
〚
-
ɛ
⁢
⁢
X
P
1
+
m
⁢
o
⁢
d
⁡
(
-
k
+
P
1
+
M
2
+
p
-
1
,
Q
)
*
,
for
⁢
⁢
k
∈
〚
M
2
+
P
1
;
M
-
P
2
〚
,
with P1 and P2 predefined positive integers, such as P1+P2 is strictly smaller than M/2, p is a predefined integer, Q is a positive integer smaller than M/2, and ε is 1 or −1 and Xk* being the complex conjugate of Xk;
applying at least a M size DFT then a N size IDFT corresponding to a first transmit antenna, to the first block of M symbols to obtain a first single-carrier frequency division multiple access, SC-FDMA, symbol representing the first block of M symbols, said first SC-FDMA symbol being of a given duration;
applying at least a M size DFT then a N size IDFT corresponding to a second transmit antenna, to the second block of M symbols to obtain a second single-carrier frequency division multiple access, SC-FDMA, symbol representing the second block of M symbols, said second SC-FDMA symbol being of the given duration;
transmitting during a time interval of the given duration, respectively on the first and second transmit antennas, simultaneously the first and second SC-FDMA symbols, into the radio signal;
said method comprising:
determining a number L smaller than or equal to min(M/2−P1−P2;
K) of integers such as
{
n
i
|
i
∈
〚
1
;
L
〛
,
P
1
≤
n
i
<
M
2
-
P
2
,
∀
i
,
j
∈
〚
1
;
L
〛
2
,
i
<
j
⇒
n
i
<
n
j
}
;
and for each i-th quadruplet out of L quadruplets of a first, a second, a third and a fourth Reference Signals among the K quadruplets:
inserting the first Reference Signal such as samples of the first Reference Signal are in positions in the first SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
inserting the second Reference Signal such as samples of the second Reference Signal are in positions in the first SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
m
⁢
o
⁢
d
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols;
inserting the third Reference Signal such as samples of the third Reference Signal are in positions in the second SC-FDMA symbol dependent on a position ni of the symbol Xni in the first block of M symbols;
inserting the fourth Reference Signal such as samples of the fourth Reference Signal are in positions in the second SC-FDMA symbol dependent on the position
M
2
+
P
1
+
mod
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
of the symbol
X
M
2
+
P
1
+
m
⁢
o
⁢
d
⁡
(
-
n
i
+
P
1
+
p
-
1
,
Q
)
in the first block of M symbols.

255 more elements

Facts

Application

16/967,689Filed 18 Feb 2019

Priority

EP 1830532222 Mar 2018

Published

US 2021/0036773 A14 Feb 2021

Granted

16 May 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04B 7/0413
Using two or more spaced independent antennas: mIMO systems
H04B 7/208
Multiple access: frequency-division multiple access [FDMA]
H04B 7/0456
MIMO systems: selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
H04B 7/2126
Synchronisation: using a reference station