Receiver apparatus, receiving method, and program

摘要

An interpolation method selection processing section 41 derives, from a ZF output signal, an error in a frequency direction and an error in a time direction concerning two transmit antennas (TxAnt#0#1) used in two antenna transmission, respectively, and determines if the error in the frequency direction is smaller than the error in the time direction. In case the determination indicates that the error in the frequency direction is smaller than the error in the time direction concerning the two transmit antennas (TxAnt#0#1), a frequency interpolation processing section 43 interpolates the ZF output signal in the frequency direction and produces a provisional estimate. If it is determined that the error in the frequency direction is not smaller than the error in the time direction concerning the two transmit antennas (TxAnt#0#1), a time interpolation processing section 42 interpolates the ZF output signal in the time direction and generates a provisional estimate.

主权项

1. A receiver apparatus for a communication system using four transmitting antennas and two receiving antennas, comprising a processor configured to:
determine whether or not, in a pilot pattern in which a pilot symbol is arranged at a different location in a frequency-time matrix with respect to each of the transmitting antennas, an error of a channel estimation value at the pilot symbol location in a frequency direction is smaller than an error in a time direction for predetermined two of the transmitting antennas, the channel estimation value being calculated by multiplying a received signal by the pilot symbol; perform an interpolation in the frequency direction on the channel estimation value at the pilot symbol location to calculate a channel estimation value having a 3-subcarrier interval if the error in the frequency direction is determined to be smaller than the error in the time direction; and perform an interpolation in the time direction on the channel estimation value at the pilot symbol location to calculate a channel estimation value having a 3-subcarrier interval if the error in the frequency direction is not determined to be smaller than the error in the time direction.