PILOT TRANSMISSION METHOD, MIMO TRANSMISSION DEVICE, AND MIMO RECEPTION DEVICE

摘要

It is possible to provide a novel pilot transmission method which can calculate an accurate channel estimation value, a MIMO transmission device using the pilot transmission method, and a MIMO reception device which communicates with the MIMO transmission device. The MIMO transmission device (100) includes phase adjustment units (130-1, 130-2) which are controlled by a pilot transmission control unit (170) to multiply parallel pilot signals by a phase adjustment coefficient group so as to adjust the pilot signal transmission timing. The pilot transmission control unit (170) differentiates the order of the transmission antennas in accordance with the pilot transmission timing between an even-number subcarrier group and an odd-number subcarrier group. At a reception side, a path not affected by the inter-path interference is extracted for each of the combinations of the transmission antennas and the subcarrier groups. A channel estimation value is calculated according to the extracted path so as to improve the channel estimation accuracy.