| 摘要 |
PROBLEM TO BE SOLVED: To estimate an ICI component in a receiver in a MIMO system.SOLUTION: A receiver 2 comprises: a Fourier transform unit 202 for receiving, through a plurality of reception antennas 200, an OFDM signal including a cluster pilot obtained by making carrier symbols sandwiching a SP signal from both adjacent sides be null signals, to generate a complex baseband signal by performing Fourier transform on the OFDM signal; a pilot signal extraction unit 203 for extracting the cluster pilot included in the complex baseband signal; a transmission path response estimation unit 204 for calculating a propagation path matrix in a time region on the basis of the cluster pilot before calculating a propagation path matrix in a frequency region; a MIMO detection unit 205 for performing MIMO separation on the complex baseband signal by using a transmission path response in the frequency region; a likelihood ratio calculation unit 207 for calculating a likelihood ratio of each transmission bit by using data obtained by the MIMO separation; and an error correction decoding unit 209 for decoding an estimation value of the transmitted bit by using the likelihood ratio.SELECTED DRAWING: Figure 1 |
