Coefficient setting method and apparatus for butterfly filter, receiver, and receiving method

摘要

The present invention relates to a coefficient setting method and apparatus for a butterfly filter, a receiver, and a receiving method. The receiver is a dual-polarization coherent optical OFDM receiver, which performs phase recovery on the signal received for each orthogonal frequency division multiplexing code, and performs the phase-recovered first polarization signal and the phase-restored first polarization signal. A phase recovery device that obtains a dual-polarized signal, and performs butterfly filtering on the first polarized signal and the second polarized signal that have been phase recovered for each orthogonal frequency division multiplex code. The first polarization signal and the butterfly filtered second polarization signal, butterfly filter, coefficient setting means for setting the filter coefficient used for the current orthogonal frequency division multiplexing code of the butterfly filter, and butterfly filtered Data recovery to recover data from the first polarization signal and the second polarization signal after butterfly filtering And a device. [Selection] Figure 2