Method for wireless communication system and device using the same
View Patent ↗A method, for determining a first amount of a plurality of high-throughput long training fields within a packet in a wireless communication system, includes determining a second amount of a plurality of space time streams needed by the wireless communication system transmitting the packet, and setting the first amount to be greater than or equal to 8 when the second amount is greater than 4.
1. A method for determining a first amount of a plurality of high-throughput long training fields within a packet in a wireless communication system, comprising:
determining a second amount of a plurality of space time streams needed by the wireless communication system transmitting the packet;
setting the first amount to be equal to 8 for at least two different values of the second amount of the plurality of space time streams when the second amount equals any integer selected from 5 to 8; and
setting a spreading code matrix P, for transforming the plurality of high-throughput long training field by the wireless communication system, to be:
P
=
[
P
11
P
12
P
21
P
22
]
;
wherein P11, P12, P21, and P22 are 4×4 matrixes, respectively.
2. The method of claim 1 , wherein P11 is a spreading code matrix for transforming the plurality of high-throughput long training field by the wireless communication system, when the second amount is smaller than or equal to 4.
3. The method of claim 2 , wherein
P
11
=
[
1
-
1
1
1
1
1
-
1
1
1
1
1
-
1
-
1
1
1
1
]
;
P
12
=
[
1
-
1
1
1
1
1
-
1
1
1
1
1
-
1
-
1
1
1
1
]
;
P
21
=
[
1
1
1
1
1
-
1
1
-
1
1
1
-
1
-
1
-
1
-
1
-
1
1
]
;
and
P
22
=
[
-
1
-
1
-
1
-
1
-
1
1
-
1
1
-
1
-
1
1
1
-
1
1
1
-
1
]
.
4. The method of claim 2 , wherein
P
11
=
[
1
-
1
1
1
1
1
-
1
1
1
1
1
-
1
-
1
1
1
1
]
;
P
12
=
[
1
-
1
1
1
1
1
-
1
1
1
1
1
-
1
-
1
1
1
1
]
;
P
21
=
[
1
-
1
1
1
1
1
-
1
1
1
1
1
-
1
-
1
1
1
1
]
;
and
P
22
=
[
-
1
1
-
1
-
1
-
1
-
1
1
-
1
-
1
-
1
-
1
1
1
-
1
-
1
-
1
]
.
5. The method of claim 2 , wherein P21 and P22 are capable of undergoing linear operations by a unit of a row.
6. A wireless communication device, for transmitting a packet having a first amount of a plurality of high-throughput long training fields, comprising:
a microprocessor; and
a memory, for storing a program for instructing the microprocessor to execute the following steps:
determining a second amount of a plurality of space time streams for transmitting the packet;
setting the first amount to be equal to 8 for at least two different values of the second amount of the plurality of space time streams when the second amount equals any integer selected from 5 to 8; and
setting a spreading code matrix P, for transforming the plurality of high-throughput long training field, to be:
P
=
[
P
11
P
12
P
21
P
22
]
;
wherein P11, P12, P21, and P22 are 4×4 matrixes, respectively.
7. The wireless communication device of claim 6 , wherein P11 is a spreading code matrix for transforming the plurality of high-throughput long training field, when the second amount is smaller than or equal to 4.
8. The wireless communication device of claim 7 , wherein
P
11
=
[
1
-
1
1
1
1
1
-
1
1
1
1
1
-
1
-
1
1
1
1
]
;
P
12
=
[
1
-
1
1
1
1
1
-
1
1
1
1
1
-
1
-
1
1
1
1
]
;
P
21
=
[
1
1
1
1
1
-
1
1
-
1
1
1
-
1
-
1
-
1
-
1
-
1
1
]
;
and
P
22
=
[
-
1
-
1
-
1
-
1
-
1
1
-
1
1
-
1
-
1
1
1
-
1
1
1
-
1
]
.
9. The wireless communication device of claim 7 , wherein
P
11
=
[
1
-
1
1
1
1
1
-
1
1
1
1
1
-
1
-
1
1
1
1
]
;
P
12
=
[
1
-
1
1
1
1
1
-
1
1
1
1
1
-
1
-
1
1
1
1
]
;
P
21
=
[
1
-
1
1
1
1
1
-
1
1
1
1
1
-
1
-
1
1
1
1
]
;
and
P
22
=
[
-
1
1
-
1
-
1
-
1
-
1
1
-
1
-
1
-
1
-
1
1
1
-
1
-
1
-
1
]
.
10. The wireless communication device of claim 7 , wherein P21 and P22 are capable of undergoing linear operations by a unit of a row.