Patent ID: 8787496

Claim:
A receiving apparatus, comprising: a first receiver configured for receiving a first known signal which is in a format of a legacy system and communicated in a predetermined channel; a processing unit configured for determining whether a control signal is assigned posterior to said first known signal or not, wherein said control signal has a format compatible with the legacy system, wherein said control signal is in a format of a MIMO system and is communicated in a plurality of channels into which the predetermined channel corresponding to the legacy system is spatially divided; said receiving apparatus further comprising a second receiver configured for performing a reception operation for receiving a data signal which is assigned posterior to the first known signal and which is assigned in a channel corresponding to the legacy system, if said processing unit has determined that the control signal is not assigned; and wherein said processing unit is further configured for stopping said reception operation for MIMO-STS, MIMO-LTS, and data assigned posterior to the control signal before the reception of said signal is completed if said processing unit has determined that the control signal is assigned.