| 摘要 |
PROBLEM TO BE SOLVED: To provide a data reception system that constantly provides an appropriate equalization parameter for an equalizer.SOLUTION: A data reception system including a complex equalization unit 10 for equalizing a digital modulation signal A, a demodulation unit 20 for performing digital demodulation on an output signal A', and an error correction decoding unit 30 for performing error correction decoding on an output signal B comprises: a first Fourier expansion unit 40 for performing, in order to provide an appropriate equalization parameter, Fourier expansion on a signal obtained by performing re-modulation after reflecting an amount of delay generated on a propagation path in a signal obtained by re-encoding an output signal from the error correction decoding unit 30; a second Fourier expansion unit 50 for performing Fourier expansion on the output signal A' from the complex equalization unit 10; and an equalization parameter setting unit 60 for continuously providing an updated equalization parameter for the complex equalization unit while introducing, to the equalization parameter, distortion information in which a noise component is emerged and which is obtained by statistical processing from a temporal variation in a difference extracted from output signals D', D'' from the first and second Fourier expansion units.SELECTED DRAWING: Figure 1 |
