US 7,508,880 B2Granted

Apparatus and method for space-time-frequency block coding for increasing performance

AssigneeSamsung Electronics Co., Ltd.

InventorsSung-Ryul Yun, Chan-Byoung Chae, Hong-Sil Jeong, Won-Il Roh, Dong-Seek Park, Jae-Yoel Kim, Jeong-Tae Oh, Kyun-Byoung Ko

Life of this patent

Estimating the term…

Abstract

A space-time-frequency block coding apparatus and method in a transmitter with three transmit (Tx) antennas are provided. An input symbol sequence is transmitted through three Tx antennas according to a permutation method using a selected transmission matrix in order to improve the performance of an STFBC.

Claims20

Dependent claims

A transmitter with three transmit antennas in a communication system using a space-time-frequency block coding scheme, the transmitter comprising:

a pre-coder for pre-coding a symbol vector of an input symbol sequence by multiplying the symbol vector by ejθ, θ being a phase rotation angle, reconstructing the symbol vector multiplied with ejθ and outputting pre-coded symbols c1, c2, c3, and c4, given as,
c1=x1+jy3
c2=x2+jy4
c3=x3+jy1
c4=x4+jy2
where ck represents a kth pre-coded symbol, xk represents a real term of kth symbol within the symbol vector multiplied with ejθ, and jyk represents an imaginary term of kth symbol within the symbol vector multiplied with ejθ;
and
a space-time-frequency block code (STFBC) mapper for selecting an STFBC using a permutation matrix in which the following matrices A, B and C are arranged in a predetermined order, mapping the pre-coded symbols to the transmit antennas according to the selected STFBC, and transmitting the mapped symbols through the transmit antennas,
A
=
[
s
1
-
s
2
*
0
0
s
2
s
1
*
s
3
-
s
4
*
0
0
s
4
s
3
*
]
B
=
[
s
1
-
s
2
*
s
3
-
s
4
*
s
2
s
1
*
0
0
0
0
s
4
s
3
*
]
C
=
[
s
1
-
s
2
*
0
0
0
0
s
3
-
s
4
*
s
2
s
1
*
s
4
s
3
*
]
where a row represents sysmbols for a corresponding antenna and a column represents symbols mapped with a subcarrier.

96 more elements

A transmitter with three transmit antennas in a communication system using a space-time-frequency block coding scheme, the transmitter comprising:

a pre-coder for pre-coding a symbol vector of an input symbol sequence by multiplying the symbol vector by ejθ, θ being a phase rotation angle, reconstructing the symbol vector multiplied with ejθ and outputting pre-coded symbols c1, c2, c3, and c4, given as,
c1=x1+jy3
c2=x2+jy4
c3=x3+jy1
c4=x4+jy2
where ck represents a kth pre-coded symbol, xk represents a real term of kth symbol within the symbol vector multiplied with ejθ, and jyk represents an imaginary term of kth symbol within the symbol vector multiplied with ejθ;
and
a space-time-frequency block code (STFBC) mapper for selecting an STFBC using a permutation matrix calculated by
Ak:k=mod(floor((index of logical data subcarrier−1)/2), 3)+1
mapping the pre-coded symbols to the transmit antennas according to the selected STFBC, and transmitting the mapped symbols through the transmit antennas,
where Ak(A1=A, A2=B, A3=C) is an antenna grouping pattern for subcarriers, index of logical data subcarrier ranges from 1 to the total number of subcarriers, and the matrices A, B and C are
A
=
[
s
1
-
s
2
*
0
0
s
2
s
1
*
s
3
-
s
4
*
0
0
s
4
s
3
*
]
B
=
[
s
1
-
s
2
*
s
3
-
s
4
*
s
2
s
1
*
0
0
0
0
s
4
s
3
*
]
C
=
[
s
1
-
s
2
*
0
0
0
0
s
3
-
s
4
*
s
2
s
1
*
s
4
s
3
*
]
where a row represents symbols for corresponding antenna and a column represents symbols mapped with a subcarrier.

99 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/205,669Filed 17 Aug 2005
Priority: KR 10-2004-006479917 Aug 2004
Published: US 2006/0039500 A123 Feb 2006
Granted: 24 Mar 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04L 1/0606
Using space diversity: space-frequency coding
H04L 1/0625
Space-time coding: transmitter arrangements
H04L 1/0668
Properties of the code: orthogonal systems, e.g. using Alamouti codes
H04L 1/0681
Characterised by the signaling: adapting space time parameters, i.e. modifying the space time matrix

Family

US 2006/0039500 A1Pre-grant publication · published 23 Feb 2006
US 7,508,880 B2This patent

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

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US 7,508,880 B2Granted

Apparatus and method for space-time-frequency block coding for increasing performance

AssigneeSamsung Electronics Co., Ltd.

InventorsSung-Ryul Yun, Chan-Byoung Chae, Hong-Sil Jeong, Won-Il Roh, Dong-Seek Park, Jae-Yoel Kim, Jeong-Tae Oh, Kyun-Byoung Ko

Life of this patent

Estimating the term…

Abstract

Claims20

Dependent claims

A transmitter with three transmit antennas in a communication system using a space-time-frequency block coding scheme, the transmitter comprising:

a pre-coder for pre-coding a symbol vector of an input symbol sequence by multiplying the symbol vector by ejθ, θ being a phase rotation angle, reconstructing the symbol vector multiplied with ejθ and outputting pre-coded symbols c1, c2, c3, and c4, given as,
c1=x1+jy3
c2=x2+jy4
c3=x3+jy1
c4=x4+jy2
where ck represents a kth pre-coded symbol, xk represents a real term of kth symbol within the symbol vector multiplied with ejθ, and jyk represents an imaginary term of kth symbol within the symbol vector multiplied with ejθ;
and
a space-time-frequency block code (STFBC) mapper for selecting an STFBC using a permutation matrix in which the following matrices A, B and C are arranged in a predetermined order, mapping the pre-coded symbols to the transmit antennas according to the selected STFBC, and transmitting the mapped symbols through the transmit antennas,
A
=
[
s
1
-
s
2
*
0
0
s
2
s
1
*
s
3
-
s
4
*
0
0
s
4
s
3
*
]
B
=
[
s
1
-
s
2
*
s
3
-
s
4
*
s
2
s
1
*
0
0
0
0
s
4
s
3
*
]
C
=
[
s
1
-
s
2
*
0
0
0
0
s
3
-
s
4
*
s
2
s
1
*
s
4
s
3
*
]
where a row represents sysmbols for a corresponding antenna and a column represents symbols mapped with a subcarrier.

96 more elements

A transmitter with three transmit antennas in a communication system using a space-time-frequency block coding scheme, the transmitter comprising:

a pre-coder for pre-coding a symbol vector of an input symbol sequence by multiplying the symbol vector by ejθ, θ being a phase rotation angle, reconstructing the symbol vector multiplied with ejθ and outputting pre-coded symbols c1, c2, c3, and c4, given as,
c1=x1+jy3
c2=x2+jy4
c3=x3+jy1
c4=x4+jy2
where ck represents a kth pre-coded symbol, xk represents a real term of kth symbol within the symbol vector multiplied with ejθ, and jyk represents an imaginary term of kth symbol within the symbol vector multiplied with ejθ;
and
a space-time-frequency block code (STFBC) mapper for selecting an STFBC using a permutation matrix calculated by
Ak:k=mod(floor((index of logical data subcarrier−1)/2), 3)+1
mapping the pre-coded symbols to the transmit antennas according to the selected STFBC, and transmitting the mapped symbols through the transmit antennas,
where Ak(A1=A, A2=B, A3=C) is an antenna grouping pattern for subcarriers, index of logical data subcarrier ranges from 1 to the total number of subcarriers, and the matrices A, B and C are
A
=
[
s
1
-
s
2
*
0
0
s
2
s
1
*
s
3
-
s
4
*
0
0
s
4
s
3
*
]
B
=
[
s
1
-
s
2
*
s
3
-
s
4
*
s
2
s
1
*
0
0
0
0
s
4
s
3
*
]
C
=
[
s
1
-
s
2
*
0
0
0
0
s
3
-
s
4
*
s
2
s
1
*
s
4
s
3
*
]
where a row represents symbols for corresponding antenna and a column represents symbols mapped with a subcarrier.

99 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/205,669Filed 17 Aug 2005
Priority: KR 10-2004-006479917 Aug 2004
Published: US 2006/0039500 A123 Feb 2006
Granted: 24 Mar 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04L 1/0606
Using space diversity: space-frequency coding
H04L 1/0625
Space-time coding: transmitter arrangements
H04L 1/0668
Properties of the code: orthogonal systems, e.g. using Alamouti codes
H04L 1/0681
Characterised by the signaling: adapting space time parameters, i.e. modifying the space time matrix