Long training sequence method and device for wireless communications
View Patent ↗A method and device for transmitting a frame of a wireless communication begins by generating a preamble of the frame that includes a short training sequence and at least one long training sequence. The at least one long training sequence includes non-zero energy on each of a plurality of subcarriers except a DC subcarrier. The at least one long training sequence corresponds to the number of antennas and applicable wireless communication standards. A matrix is defined to represent the at least one long training sequence. The preamble is compatible with legacy and current standards. A channel is defined with a set of sub carriers to transmit the frame.
1. A method for transmitting a frame for wireless communication, the method comprising:
determining at least one first training sequence according to a number of antennas for transmitting a frame;
generating a preamble for said frame, said preamble including a second training sequence and said at least one first training sequence; and
transmitting said preamble with said frame using said number of antennas,
wherein said determining includes deriving a matrix for said at least one first training sequence, and
wherein said deriving includes determining a size for said matrix, wherein said size corresponds to said number of antennas.
2. The method of claim 1 , wherein said generating includes determining a type of said preamble, and wherein said type corresponds to a protocol standard.
3. The method of claim 2 , wherein said protocol standard comprises a current wireless communication standard.
4. The method of claim 2 , wherein said protocol standard comprises a legacy wireless communication standard.
5. The method of claim 1 , wherein said generating includes generating a legacy set up information field.
6. The method of claim 1 , wherein said generating includes generating a remaining set up information field.
7. The method of claim 1 , further comprising determining whether a legacy device is receiving said frame.
8. The method of claim 1 , wherein said generating comprises inserting a signal field into said preamble.
9. The method of claim 1 , wherein said generating comprises generating a legacy set up information field in said preamble.
10. The method of claim 1 , wherein said generating includes determining a type of said preamble.
11. The method of claim 10 , wherein said type corresponds to a wireless communication protocol standard.
12. The method of claim 11 , wherein said wireless communication protocol standard comprises a wireless digital communication protocol standard.
13. The method of claim 11 , wherein said wireless communication protocol standard comprises a wireless local area network communication protocol standard.
14. The method of claim 11 , wherein said wireless communication protocol standard comprises IEEE 802.11n protocol.
15. The method of claim 1 , wherein said wireless communication comprises multiple-input-multiple-output (MIMO) wireless communication.
16. The method of claim 1 , wherein said wireless communication comprises orthogonal frequency division multiplexing (OFDM) wireless communication.
17. The method of claim 1 , wherein said wireless communication comprises advanced mobile phone services (AMPS) or digital AMPS.
18. The method of claim 1 , wherein said wireless communication comprises global system for mobile communications (GSM) wireless communication.
19. The method of claim 1 , wherein said wireless communication comprises code division multiple access (CDMA) wireless communication.
20. The method of claim 1 , wherein said wireless communication comprises Bluetooth wireless communication.
21. The method of claim 1 , wherein said wireless communication comprises one or more of the following types of wireless communication: IEEE 802.11a communication, IEEE 802.11b communication and 802.11g communication.