Multiple streams using partial STBC with SDM within a wireless local area network
View Patent ↗A method of communicating data to M receiving antennas from N transmitting antennas, where M and N are integers, the method includes the steps of receiving M data signals from M receive antennas, applying the M data signals to a space/time decoder to produce M decoded streams and reconstructing original data transmitted via N transmit antennas from the M decoded streams. At least P transmitting antennas transmit space-time block-coded signals and (N-P) transmitting antennas transmit code signals through spatial division multiplexing, where P is an integer.
1. A method of communicating data to M receiving antennas from N transmitting antennas, where M and N are integers, the method comprising:
receiving M data signals from M receive antennas;
applying the M data signals to a space/time decoder to produce M decoded streams; and
reconstructing original data transmitted via N transmit antennas of the N transmitting antennas from the M decoded streams;
wherein at least P transmitting antennas of the N transmitting antennas transmit space-time block-coded signals and (N-P) transmitting antennas transmit code signals through spatial division multiplexing, where P is an integer.
2. The method of claim 1 , wherein reconstructing of original data comprises determining a number of transmit streams and configurations of those transmit streams through analysis of the M decoded streams.
3. The method of claim 1 , wherein P comprises two and the receiving of M data signals comprises receiving two space-time block-coded signals.
4. The method of claim 3 , wherein N comprises three and the receiving of M data signals comprises receiving a repetition code signal.
5. A method according to claim 1 , wherein the reconstructing of original data comprises zero-forcing terms equivalent to relationships between signals sent from the N transmitting antennas to the M receiving antennas to cancel interference.
6. A method according to claim 5 , wherein the relationships comprise:
[
r
1
r
2
]
=
[
H
1
G
1
H
2
G
2
]
[
c
1
c
2
]
+
[
n
1
n
2
]
where
,
c
1
=
[
c
1
(
t
0
)
c
1
(
t
1
)
]
,
c
2
=
[
c
2
(
t
0
)
]
,
r
1
=
[
r
1
(
t
1
)
r
1
*
(
t
2
)
]
,
r
2
=
[
r
2
(
t
1
)
r
2
*
(
t
2
)
]
,
H
i
=
[
h
1
i
h
2
i
h
2
i
*
-
h
1
i
*
]
,
G
i
=
[
g
i
g
i
*
]
,
where r i (t) and c i (t) are the received and transmitted signals, respectively, n i represent noise terms and G i and H i represent relationships between signals sent from three transmit antennas to two receive antennas.
7. A method according to claim 5 , wherein the relationships comprise:
[
r
1
r
2
]
4
×
1
=
[
H
1
G
1
H
2
G
2
]
4
×
4
[
c
1
c
2
]
4
×
1
+
[
n
1
n
2
]
4
×
1
where
,
c
1
=
[
c
1
(
t
0
)
c
2
(
t
0
)
]
,
c
2
=
[
c
3
(
t
0
)
c
4
(
t
0
)
]
,
r
1
=
[
r
1
(
t
0
)
r
1
*
(
t
1
)
]
,
r
2
=
[
r
2
(
t
0
)
r
2
*
(
t
1
)
]
,
H
i
=
[
h
1
i
h
2
i
h
2
i
*
-
h
1
i
*
]
,
G
i
=
[
g
i
0
0
g
i
*
]
where r i (t) and c i (t) are the received and transmitted signals, respectively, n i represent noise terms and G i and H i represent relationships between signals sent three transmit antennas to two receive antennas.
8. A method according to claim 5 , wherein the relationships comprise:
[
r
1
r
2
r
3
]
6
×
1
=
[
H
1
G
1
H
2
G
2
H
3
G
3
]
6
×
6
[
c
1
c
2
c
3
]
6
×
1
+
[
n
1
n
2
n
3
]
6
×
1
where
,
c
1
=
[
c
1
(
t
0
)
c
2
(
t
0
)
]
,
c
2
=
[
c
3
(
t
0
)
c
4
(
t
0
)
]
,
c
3
=
[
c
5
(
t
0
)
c
6
(
t
0
)
]
,
r
1
=
[
r
1
(
t
0
)
r
1
*
(
t
1
)
]
,
r
2
=
[
r
2
(
t
0
)
r
2
*
(
t
1
)
]
,
r
3
=
[
r
3
(
t
0
)
r
3
*
(
t
1
)
]
,
H
i
=
[
h
1
i
h
2
i
h
2
i
*
-
h
1
i
*
]
,
G
i
=
[
g
1
i
0
g
2
i
0
0
g
1
i
*
0
g
2
i
*
]
where r i (t) and c i (t) are the received and transmitted signals, respectively, n i represent noise terms and G i and H i represent relationships between signals sent from four transmit antennas to three receive antennas.
9. A receiver for communicating data from N transmitting antennas to M receiving antennas, where M and N are integers, comprising:
receiving means for receiving M data signals via M receive antennas;
applying means for applying the M data signals to a space/time decoder to produce M decoded streams; and
reconstructing means for reconstructing original data transmitted via N transmit antennas from the M decoded streams;
wherein at least P transmitting antennas of the N transmitting antennas transmit space-time block-coded signals and (N-P) transmitting antennas of the N transmitting antennas transmit code signals through spatial division multiplexing, where P is an integer.
10. The reciever of claim 9 , wherein the reconstructing means comprises determining means for determining a number of transmit streams and configurations of those transmit streams through analysis of the M decoded streams.
11. The receiver of claim 9 , wherein P comprises two and the receiving means comprise means for receiving two space-time block-coded signals.
12. The receiver of claim 11 , wherein N comprises three and the receiving means comprise means for receiving a repetition code signal.
13. A receiver according to claim 9 , wherein the applying means further comprises zero-forcing means for zero-forcing terms equivalent to relationships between signals sent from the N transmitting antennas to the M receiving antennas to cancel interference.
14. A receiver according to claim 13 , wherein the relationships comprise:
[
r
1
r
2
]
=
[
H
1
G
1
H
2
G
2
]
[
c
1
c
2
]
+
[
n
1
n
2
]
where
,
c
1
=
[
c
1
(
t
0
)
c
1
(
t
1
)
]
,
c
2
=
[
c
2
(
t
0
)
]
,
r
1
=
[
r
1
(
t
1
)
r
1
*
(
t
2
)
]
,
r
2
=
[
r
2
(
t
1
)
r
2
*
(
t
2
)
]
,
H
i
=
[
h
1
i
h
2
i
h
2
i
*
-
h
1
i
*
]
,
G
i
=
[
g
i
g
i
*
]
,
where r i (t) and c i (t) are the received and transmitted signals, respectively, n i represent noise terms and G i and H i represent relationships between signals sent from three transmit antennas to two receive antennas.
15. A receiver according to claim 13 , wherein the relationships comprise:
[
r
1
r
2
]
4
×
1
=
[
H
1
G
1
H
2
G
2
]
4
×
4
[
c
1
c
2
]
4
×
1
+
[
n
1
n
2
]
4
×
1
where
,
c
1
=
[
c
1
(
t
0
)
c
2
(
t
0
)
]
,
c
2
=
[
c
3
(
t
0
)
c
4
(
t
0
)
]
,
r
1
=
[
r
1
(
t
0
)
r
1
*
(
t
1
)
]
,
r
2
=
[
r
2
(
t
0
)
r
2
*
(
t
1
)
]
,
H
i
=
[
h
1
i
h
2
i
h
2
i
*
-
h
1
i
*
]
,
G
i
=
[
g
i
0
0
g
i
*
]
where r i (t) and c i (t) are the received and transmitted signals, respectively, n i represent noise terms and G i and H i represent relationships between signals sent three transmit antennas to two receive antennas.
16. A receiver according to claim 13 , wherein the relationships comprise:
[
r
1
r
2
r
3
]
6
×
1
=
[
H
1
G
1
H
2
G
2
H
3
G
3
]
6
×
6
[
c
1
c
2
c
3
]
6
×
1
+
[
n
1
n
2
n
3
]
6
×
1
where
,
c
1
=
[
c
1
(
t
0
)
c
2
(
t
0
)
]
,
c
2
=
[
c
3
(
t
0
)
c
4
(
t
0
)
]
,
c
3
=
[
c
5
(
t
0
)
c
6
(
t
0
)
]
,
r
1
=
[
r
1
(
t
0
)
r
1
*
(
t
1
)
]
,
r
2
=
[
r
2
(
t
0
)
r
2
*
(
t
1
)
]
,
r
3
=
[
r
3
(
t
0
)
r
3
*
(
t
1
)
]
,
H
i
=
[
h
1
i
h
2
i
h
2
i
*
-
h
1
i
*
]
,
G
i
=
[
g
1
i
0
g
2
i
0
0
g
1
i
*
0
g
2
i
*
]
where r i (t) and c i (t) are the received and transmitted signals, respectively, n i represent noise terms and G i and H i represent relationships between signals sent from four transmit antennas to three receive antennas.
17. A receiver for communicating data from N transmitting antennas to M receiving antennas, where M and N are integers, comprising:
M receive antennas, for receiving M data signals;
a space/time decoder, configured to produce M decoded streams based on the M data signals; and
symbol demapping modules, configured to reconstruct original data transmitted via N transmit antennas from the M decoded streams;
wherein at least P transmitting antennas of the N transmitting antennas transmit space-time block-coded signals and (N-P) transmitting antennas of the N transmitting antennas transmit code signals through spatial division multiplexing, where P is an integer.
18. The reciever of claim 17 , wherein the space/time decoder is configured to determine a number of transmit streams and configurations of those transmit streams through analysis of the M decoded streams.
19. The receiver of claim 17 , wherein P comprises two and the space/time decoder is configured to receive two space-time block-coded signals.
20. The receiver of claim 19 , wherein N comprises three and the space/time decoder is configured to receive a repetition code signal.
21. A receiver according to claim 17 , wherein the space/time decoder is configured to zero-force terms equivalent to relationships between signals sent from the N transmitting antennas to the M receiving antennas to cancel interference.
22. A receiver according to claim 21 , wherein the relationships comprise:
[
r
1
r
2
]
=
[
H
1
G
1
H
2
G
2
]
[
c
1
c
2
]
+
[
n
1
n
2
]
where
,
c
1
=
[
c
1
(
t
0
)
c
1
(
t
1
)
]
,
c
2
=
[
c
2
(
t
0
)
]
,
r
1
=
[
r
1
(
t
1
)
r
1
*
(
t
2
)
]
,
r
2
=
[
r
2
(
t
1
)
r
2
*
(
t
2
)
]
,
H
i
=
[
h
1
i
h
2
i
h
2
i
*
-
h
1
i
*
]
,
G
i
=
[
g
i
g
i
*
]
,
where r i (t) and c i (t) are the received and transmitted signals, respectively, n i represent noise terms and G i and H i represent relationships between signals sent from three transmit antennas to two receive antennas.
23. A receiver according to claim 21 , wherein the relationships comprise:
[
r
1
r
2
]
4
×
1
=
[
H
1
G
1
H
2
G
2
]
4
×
4
[
c
1
c
2
]
4
×
1
+
[
n
1
n
2
]
4
×
1
where
,
c
1
=
[
c
1
(
t
0
)
c
2
(
t
0
)
]
,
c
2
=
[
c
3
(
t
0
)
c
4
(
t
0
)
]
,
r
1
=
[
r
1
(
t
0
)
r
1
*
(
t
1
)
]
,
r
2
=
[
r
2
(
t
0
)
r
2
*
(
t
1
)
]
,
H
i
=
[
h
1
i
h
2
i
h
2
i
*
-
h
1
i
*
]
,
G
i
=
[
g
i
0
0
g
i
*
]
where r i (t) and c i (t) are the received and transmitted signals, respectively, n i represent noise terms and G i and H i represent relationships between signals sent three transmit antennas to two receive antennas.
24. A receiver according to claim 21 , wherein the relationships comprise:
[
r
1
r
2
r
3
]
6
×
1
=
[
H
1
G
1
H
2
G
2
H
3
G
3
]
6
×
6
[
c
1
c
2
c
3
]
6
×
1
+
[
n
1
n
2
n
3
]
6
×
1
where
,
c
1
=
[
c
1
(
t
0
)
c
2
(
t
0
)
]
,
c
2
=
[
c
3
(
t
0
)
c
4
(
t
0
)
]
,
c
3
=
[
c
5
(
t
0
)
c
6
(
t
0
)
]
,
r
1
=
[
r
1
(
t
0
)
r
1
*
(
t
1
)
]
,
r
2
=
[
r
2
(
t
0
)
r
2
*
(
t
1
)
]
,
r
3
=
[
r
3
(
t
0
)
r
3
*
(
t
1
)
]
,
H
i
=
[
h
1
i
h
2
i
h
2
i
*
-
h
1
i
*
]
,
G
i
=
[
g
1
i
0
g
2
i
0
0
g
1
i
*
0
g
2
i
*
]
where r i (t) and c i (t) are the received and transmitted signals, respectively, n i represent noise terms and G i and H i represent relationships between signals sent from four transmit antennas to three receive antennas.