| 摘要 |
PROBLEM TO BE SOLVED: To minimize reduction of the decoding accuracy of an error correction code due to co-channel interference.SOLUTION: A receiver unit 2 includes an input processing unit 22 for generating a complex baseband signal from an OFDM signal received, a transmission path response calculation unit 23 for calculating the transmission path response of each carrier, a MIMO detection unit 24 for generating an estimate of a transmission signal from the complex baseband signal by using the transmission path response, a noise variance calculation unit 26 for calculating the average value of noise variance in the time direction, as a carrier noise variance, for each carrier of the OFDM signal, a likelihood calculation unit 28 for calculating the likelihood ratio of each bit transmitted by using the carrier noise variance and the estimate, and an error correction code decoding unit 31 for decoding the estimate of a bit transmitted by using the likelihood ratio. |
