Wireless signal transmitting method and wireless apparatus
Interference in preamble signals and pilot signals in cooperative transmission using interference suppressing technology is avoided. A wireless apparatus for transmitting a wireless signal on which directivity control has been performed to stations in a wireless system including at least one wireless apparatus is provided with a known signal generating unit which generates a known signal to be added to the wireless signal, a weighting processing unit which performs weighting on the known signal generated by the known signal generating unit, and a wireless processing unit which transmits the known signal on which the weighting has been performed by the weighting processing unit.
1. A wireless signal receiving method in which a single access point transmits a wireless signal on which spatial division multiplexing has been performed to more than one wireless apparatuses, the wireless signal receiving method comprising:
receiving a known signal that includes at least L-LTF and signals that follow the L-LTF on which a weighting has been performed;
measuring propagation channels using the known signal; and
generating a signal in which the propagation channels are included.
2. The wireless signal receiving method according to claim 1 , wherein preamble signals and pilot signals in the known signal are beamformed.
3. A wireless apparatus that is provided in a wireless system in which a single access point transmits a wireless signal on which spatial division multiplexing has been performed to more than one wireless apparatuses, the wireless apparatus comprising:
a processor; and
a storage medium having computer program instructions stored thereon, when executed by the processor, perform to:
receive a known signal that includes at least L-LTF and signals that follow the L-LTF on which a weighting has been performed;
measure propagation channels using the known signal; and
generate a signal in which the propagation channels are included.
4. The wireless apparatus according to claim 3 , wherein preamble signals and pilot signals in the known signal are beamformed.