Multi-pilot generation method and detection method in multi-antenna communication system
View Patent ↗Provided are a multi-pilot generation method and a detection method in a multi-antenna communication system. In the method, a transmission side superimposes a first preamble sequence and a third preamble sequence to generate a second preamble sequence, which is subjected to serial/parallel conversion before the first preamble sequence and the second preamble sequence are successively transmitted from a plurality of antennas by time division. A reception side receives the first preamble sequence and the second preamble sequence by a plurality of antennas, separates the third preamble sequence from the second preamble sequence by a spatial division process, and performs a pilot correlation process by using the first preamble sequence and the separated third preamble sequence.
1. A multi-pilot generation method in a multi-antenna communication system, comprising the steps of:
generating a first preamble sequence;
superimposing the first preamble sequence and a third preamble sequence to generate a second preamble sequence; and
converting the first preamble sequence and the second preamble sequence from serial to parallel and sequentially transmitting the first preamble sequence and the second preamble sequence from a plurality of antennas through space division.
2. The multi-pilot generation method in a multi-antenna communication system according to claim 1 , wherein the first preamble sequence is a long preamble sequence.
3. The multi-pilot generation method in a multi-antenna communication system according to claim 1 , wherein the third preamble sequence is a short preamble sequence.
4. The multi-pilot generation method in a multi-antenna communication system according to claim 2 , wherein the long preamble sequence comprises a preamble sequence for channel estimation.
5. The multi-pilot generation method in a multi-antenna communication system according to claim 3 , wherein the short preamble sequence comprises a preamble sequence for frequency offset elimination.
6. The multi-pilot generation method in a multi-antenna communication system according to claim 1 , wherein the second preamble sequence is a result of multiplication of the first preamble sequence after serial-to-parallel conversion by the third preamble sequence after the serial-to-parallel conversion in a time domain.
7. The multi-pilot generation method in a multi-antenna communication system according to claim 1 , wherein the second preamble sequence is a result of multiplication of the first preamble sequence after the serial-to-parallel conversion by the third preamble sequence after the serial-to-parallel conversion in the time domain and a frequency domain.
8. A multi-pilot detection method in a multi-antenna communication system, comprising the steps of:
receiving a first preamble sequence transmitted from a plurality of antennas and a second preamble sequence on which the first preamble sequence and a third preamble sequence are superimposed, at a plurality of antennas; and
separating the third preamble sequence from the second preamble sequence through space division processing.
9. The multi-pilot detection method in a multi-antenna communication system according to claim 8 , wherein the first preamble sequence is a long preamble sequence.
10. The multi-pilot detection method in a multi-antenna communication system according to claim 8 , wherein the third preamble sequence is a short preamble sequence.
11. The multi-pilot detection method in a multi-antenna communication system according to claim 9 , wherein the long preamble sequence comprises a preamble sequence for channel estimation.
12. The multi-pilot detection method in a multi-antenna communication system according to claim 10 , wherein the short preamble sequence comprises a preamble sequence for frequency offset elimination.
13. The multi-pilot detection method in a multi-antenna communication system according to claim 8 , further comprising a step of performing channel estimation processing and frequency offset elimination processing using the first preamble sequence and the third preamble sequence.